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MITRE ATT&CK® Malware

S1245: InvisibleFerret

InvisibleFerret is a modular python malware that is leveraged for data exfiltration and remote access capabilities.[1][2][3] InvisibleFerret consists of four modules: main, payload, browser, and AnyDesk.[1] InvisibleFerret malware has been leveraged by North Korea-affiliated threat actors identified as DeceptiveDevelopment or Contagious Interview since 2023.[4][2][3][5] InvisibleFerret has historically been introduced to the victim environment through the use of the BeaverTail malware.[6][1][2][3][5]

EnterpriseS1245MalwareObject v1.0Modified
Discuss defensive coverageBack to ATT&CK
Glexia's Take · Automated analysis

Security context for executives and security teams

Automation confidenceHigh

InvisibleFerret matters because ATT&CK describes it as modular Python malware with remote access and data exfiltration capabilities across Windows, macOS, and Linux. For leaders, the practical risk is not only malware execution; it is whether the organization can recognize a cross-platform intrusion that performs discovery, collects local/browser/user data, captures input, stages data, and sends it out over command-and-control or other network channels. The supplied ATT&CK context also links it to Contagious Interview and historical introduction through BeaverTail, making software developer and cryptocurrency-related environments especially relevant where those business profiles exist.

Executive priority

Prioritize validation where business operations depend on developer workstations, remote work endpoints, cryptocurrency-related workflows, or sensitive local data. Key executive questions: do we collect enough endpoint and network evidence on macOS, Linux, and Windows; can SOC teams investigate Python-based malware and remote access tool misuse; and can incident responders prove what data was discovered, staged, captured, or exfiltrated? Because no official ATT&CK detection text is provided, this should be treated as a coverage-assessment and readiness item rather than a claim of existing detection capability.

Technical view

SOC and IR teams should map coverage to the related ATT&CK behaviors: Python and PowerShell execution, file and directory discovery, user/account/process/system/software/network discovery, local data collection and staging, clipboard and keylogging-style input capture, encoded or decoded payload artifacts, ingress tool transfer, web-protocol or non-application-layer C2, remote access tool use including the AnyDesk module noted in the description, service stopping, and exfiltration over C2 or unencrypted non-C2 protocols. Validate behavior chains rather than single indicators: a Python process performing host discovery, accessing user/browser/local data, staging files, then making unusual outbound connections is more meaningful than any one event alone.

Likely telemetry

  • Endpoint process creation and command-line telemetry for Python, PowerShell, discovery utilities, file enumeration, and service-stop activity
  • File system telemetry for new scripts, encoded or decoded files, module drops, local staging directories, and suspicious access to user or browser data locations
  • Network telemetry for outbound web traffic, non-application-layer communications, tool transfer, and possible exfiltration over C2 or unencrypted non-C2 protocols
  • Remote access tool inventory and session telemetry, especially for AnyDesk or other legitimate remote access software used outside approved support workflows
  • Clipboard access, input-capture-related endpoint signals, and security product alerts where available

Detection direction

  • Build detections around correlated behavior sequences across Linux, macOS, and Windows rather than relying on malware names, since ATT&CK provides no official detection guidance for this object.
  • Tune for Python-based execution followed by discovery techniques such as system, process, network configuration, file/directory, software, local account, and user discovery.
  • Look for collection and staging patterns before exfiltration: local data access, browser-related data access where telemetry allows, clipboard collection, keylogging-related signals, and staged files followed by outbound connections.
  • Monitor remote access tool use in context: legitimate tools can be normal, so alerting should consider installation source, first-seen use, unusual user/device pairing, unsanctioned external sessions, or activity inconsistent with IT support workflows.
  • Assess blind spots on macOS and Linux endpoints, where process, file, clipboard, and network visibility may be less mature than Windows coverage.

Mitigation priorities

  • Establish cross-platform endpoint visibility for Windows, macOS, and Linux before relying on detections for this malware family.
  • Restrict and monitor scripting runtimes and administrative interpreters according to business need, including Python and PowerShell where applicable.
  • Govern legitimate remote access tools through approved inventory, allowlisting, logging, and documented support procedures.
  • Reduce exfiltration risk with outbound network monitoring, egress controls, and review of unencrypted protocols where business operations allow.
  • Harden developer and high-risk workstations with least privilege, software inventory, and controls over downloaded tools or scripts.
Additional notes and limits

The supplied ATT&CK object identifies InvisibleFerret as modular Python malware with main, payload, browser, and AnyDesk modules, remote access and data exfiltration capabilities, and usage by Contagious Interview/DeceptiveDevelopment context. The relationship set is valuable because it expands defensive planning across execution, discovery, collection, credential access, command and control, exfiltration, stealth, and impact behaviors. Local validation should focus on whether these behaviors can be observed on the organization’s actual endpoint and network stack.

ATT&CK provides no official detection section and no top-level tactics for this malware object. This take is derived only from the supplied STIX fields, external references, and relationships; it does not assert current activity, customer exposure, specific indicators, or guaranteed detection. Platform scope is limited to the supplied Linux, macOS, and Windows listing, with related techniques including additional platforms that should not be assumed applicable without local evidence.

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Official MITRE ATT&CK definition

InvisibleFerret

InvisibleFerret is a modular python malware that is leveraged for data exfiltration and remote access capabilities.[1][2][3] InvisibleFerret consists of four modules: main, payload, browser, and AnyDesk.[1] InvisibleFerret malware has been leveraged by North Korea-affiliated threat actors identified as DeceptiveDevelopment or Contagious Interview since 2023.[4][2][3][5] InvisibleFerret has historically been introduced to the victim environment through the use of the BeaverTail malware.[6][1][2][3][5]

View the same entry on attack.mitre.org (MITRE-hosted reference; in-page links above use the Glexia ATT&CK library.)

Glexia analysis

How security teams should use this page

Treat this object as behavior context, not an attribution claim. Validate the related groups, software, data sources, and mitigations against official ATT&CK relationships and your own telemetry before making control-coverage decisions.

ATT&CK relationship table

Techniques used

This mirrors the MITRE pattern of making group, software, campaign, and technique relationships scannable. Relationship notes come from mirrored ATT&CK relationship text when available.

35 rows
DomainIDNameRelationship / procedure
EnterpriseT1082System Information Discovery

InvisibleFerret has collected OS type, hostname and system version through the "pay" module.[6][1] InvisibleFerret has also queried the victim device using Python scripts to obtain the User and Hostname.[4][3]

EnterpriseT1657Financial Theft

InvisibleFerret has searched the victim device credentials and files commonly associated with cryptocurrency wallets.[6][1][2][3]

EnterpriseT1083File and Directory Discovery

InvisibleFerret has identified specific directories and files for exfiltration using the `ssh_upload` command which contains subcommands of `.sdira`, `sdir`, `sfile`, `sfinda`, `sfindr`, `sfind`.[1][2] InvisibleFerret also has the capability to scan and upload files of interest from multiple OS systems through the use of scripts that check file names, file extensions, and avoids certain path names.[6][3] InvisibleFerret has utilized the `findstr` on Windows or the macOS `find` commands to search for files of interest.[5]

EnterpriseT1056Input Capture

InvisibleFerret has collected mouse and keyboard events using “pyWinhook”.[3]

EnterpriseT1140Deobfuscate/Decode Files or Information

InvisibleFerret has decoded XOR-encrypted and Base-64-encoded payloads prior to execution.[1]

EnterpriseT1679Selective Exclusion

InvisibleFerret has the capability to scan for file names, file extensions, and avoids pre-designated path names and file types.[6][3]

EnterpriseT1105Ingress Tool Transfer

InvisibleFerret has downloaded “AnyDesk.exe” into the user’s home directory from the C2 server when checks for the service fail to identify its presence in the victim environment.[1] InvisibleFerret has also been configured to download additional payloads using a command which calls to the /bow URI.[2][3]

EnterpriseT1518Software Discovery

InvisibleFerret has gathered installed programs and running processes.[2]

EnterpriseT1057Process Discovery

InvisibleFerret has the capability to query installed programs and running processes.[2] InvisibleFerret has also identified running processes using the Python project “psutil”.[3]

EnterpriseT1056.001KeyloggingSub-technique

InvisibleFerret has conducted keylogging using the Python project “pyWinHook” and "Pyhook".[6][1][3] InvisibleFerret has also captured keylogging thread checks for changes in an active window and key presses.[2]

EnterpriseT1087.001Local AccountSub-technique

InvisibleFerret has queried the victim device using Python scripts to obtain the User and Hostname.[4][3]

EnterpriseT1555.003Credentials from Web BrowsersSub-technique

InvisibleFerret has stolen login data, autofill data, cryptocurrency wallets, and payment information saved in web browsers such as Chrome, Brave, Opera, Yandex and Edge, to include versions affiliated with major operating systems on Windows, Linux, and macOS.[6][1] InvisibleFerret has also leveraged the command `ssh_zcp` to copy browser data to include extensions and cryptocurrency wallet data.[2]

EnterpriseT1016System Network Configuration Discovery

InvisibleFerret has collected the local IP address, and external IP.[1][3]

EnterpriseT1489Service Stop

InvisibleFerret has terminated Chrome and Brave browsers using the `taskkill` command on Windows and the `killall` command on other systems such as Linux and macOS.[1] InvisibleFerret has also utilized it’s `ssh_kill` command to terminate Chrome and Brave browser processes.[3]

EnterpriseT1033System Owner/User Discovery

InvisibleFerret has identified the user’s UUID and username through the "pay" module.[6][1][3]

EnterpriseT1543.001Launch AgentSub-technique

InvisibleFerret has established persistence using LaunchAgents on macOS that run on Startup using a file named “com.avatar.update.wake.plist”.[2]

EnterpriseT1547.013XDG Autostart EntriesSub-technique

InvisibleFerret has established persistence within GNOME-based Linux environments by placing entries within `.desktop` that run on Startup.[2]

EnterpriseT1219Remote Access Tools

InvisibleFerret has utilized remote access software including AnyDesk client through the “adc” module.[6][1][3] InvisibleFerret has also downloaded the AnyDesk client should it not already exist on the compromised host by searching for `C:/Program Files(x86)/AnyDesk/AnyDesk.exe`.[2]

EnterpriseT1614System Location Discovery

InvisibleFerret has collected the internal IP address, IP geolocation information of the infected host and sends the data to a C2 server.[3] InvisibleFerret has also leveraged the “pay” module to obtain region name, country, city, zip code, ISP, latitude and longitude using “http://ip-api.com/json”.[1]

EnterpriseT1059.006PythonSub-technique

InvisibleFerret is written in Python and has used Python scripts for execution.[6][4][1][2][3]

EnterpriseT1564.003Hidden WindowSub-technique

InvisibleFerret has executed Python instances of the browser module “.n2/bow” utilizing the `CREATE_NO_WINDOW` process creation flag.[1]

EnterpriseT1571Non-Standard Port

InvisibleFerret has been observed utilizing HTTP communications to the C2 server over ports 1224, 2245 and 8637.[6]

EnterpriseT1041Exfiltration Over C2 Channel

InvisibleFerret has used HTTP communications to the “/Uploads” URI for file exfiltration.[2]

EnterpriseT1074.001Local Data StagingSub-technique

InvisibleFerret has staged data in consolidated folders prior to exfiltration.[1]

EnterpriseT1555.005Password ManagersSub-technique

InvisibleFerret has utilized the command `ssh_zcp` to exfiltrate data from browser extensions and password managers via Telegram and FTP.[1][2]

EnterpriseT1071.001Web ProtocolsSub-technique

InvisibleFerret has used HTTP for C2 communications.[6][1][3]

EnterpriseT1560.001Archive via UtilitySub-technique

InvisibleFerret has used 7zip, RAR and zip files to archive collected data for exfiltration.[1][2]

EnterpriseT1547.001Registry Run Keys / Startup FolderSub-technique

InvisibleFerret has established persistence within Windows devices by creating a .bat file “queue.bat” within the Startup folder to run a Python script.[2]

EnterpriseT1005Data from Local System

InvisibleFerret has collected data utilizing a script that contained a list of excluded files and directory names and naming patterns of interest such as environment and configuration files, documents, spreadsheets, and other files that contained the words secret, wallet, private, and password.[1]

EnterpriseT1115Clipboard Data

InvisibleFerret has stolen data from the clipboard using the Python project “pyperclip”.[6][1][3] InvisibleFerret has also captured clipboard contents during copy and paste operations.[2]

EnterpriseT1027.013Encrypted/Encoded FileSub-technique

InvisibleFerret has utilized the XOR and Base64 encoding for each of its modules.[1] InvisibleFerret has also obfuscated files with a combination of zlib, Base64 and reverse string order.[6] InvisibleFerret has also utilized the XOR and Base64 encoding some of its Python scripts.[3]

EnterpriseT1048.003Exfiltration Over Unencrypted Non-C2 ProtocolSub-technique

InvisibleFerret has used FTP to exfiltrate files and directories using the command `ssh_upload` which contains with six subcommands of `.sdira`, `sdir`, `sfile`, `sfinda`, `sfindr` and `sfind` that had varying functions.[1][2] InvisibleFerret has exfiltrated stolen files and data to the C2 servers over ports 1224, 2245 and 8637.[6]

EnterpriseT1095Non-Application Layer Protocol

InvisibleFerret has established a connection with the C2 server over TCP traffic.[3] InvisibleFerret has also created a TCP reverse shell communicating via a socket connection over ports 1245, 80, 2245, 3001, and 5000.[1]

EnterpriseT1567Exfiltration Over Web Service

InvisibleFerret has leveraged Telegram chat to upload stolen data using the Telegram API with a bot token.[1][2]

EnterpriseT1059.001PowerShellSub-technique

InvisibleFerret has utilized a PowerShell script created in the victim’s home directory named “conf.ps1” that is used to modify configuration files for AnyDesk remote services.[1]

Associated objects

Groups, software, and campaigns

Relationship explorer

All related ATT&CK context

uses · TechniqueT1082: System Information DiscoveryEnterpriseuses · GroupG1052: Contagious InterviewEnterpriseuses · TechniqueT1657: Financial TheftEnterpriseuses · TechniqueT1083: File and Directory DiscoveryEnterpriseuses · TechniqueT1056: Input CaptureEnterpriseuses · TechniqueT1140: Deobfuscate/Decode Files or InformationEnterpriseuses · TechniqueT1679: Selective ExclusionEnterpriseuses · TechniqueT1105: Ingress Tool TransferEnterpriseuses · TechniqueT1518: Software DiscoveryEnterpriseuses · TechniqueT1057: Process DiscoveryEnterpriseuses · TechniqueT1056.001: KeyloggingEnterpriseuses · TechniqueT1087.001: Local AccountEnterpriseuses · TechniqueT1555.003: Credentials from Web BrowsersEnterpriseuses · TechniqueT1016: System Network Configuration DiscoveryEnterpriseuses · TechniqueT1489: Service StopEnterpriseuses · TechniqueT1033: System Owner/User DiscoveryEnterpriseuses · TechniqueT1543.001: Launch AgentEnterpriseuses · TechniqueT1547.013: XDG Autostart EntriesEnterpriseuses · TechniqueT1219: Remote Access ToolsEnterpriseuses · TechniqueT1614: System Location DiscoveryEnterpriseuses · TechniqueT1059.006: PythonEnterpriseuses · TechniqueT1564.003: Hidden WindowEnterpriseuses · TechniqueT1571: Non-Standard PortEnterpriseuses · TechniqueT1041: Exfiltration Over C2 ChannelEnterprise
Change history

Object version and sync metadata

The fields below describe the current mirrored snapshot. When Glexia retains multiple ATT&CK source imports, you can open the table to compare the same object across releases (hashes and MITRE timestamps). For MITRE’s own release notes and roadmap, see ATT&CK resources — Updates.

ATT&CK release
19.1
Object version
1.0
Created
Modified
Raw hash
3fed931b84de7e72...
Imported snapshots across ATT&CK releases(1)
ReleaseBundle importedObject versionModifiedStatusRaw hash
19.11.0Current bundle3fed931b84de…
Raw source

Mirrored ATT&CK source object

The raw object is retained through the mirrored ATT&CK source bundle and object hash. The raw endpoint returns the exact object from the mirrored bundle when available.

Open mirrored raw JSONOpen MITRE-hosted copy
Source references

External references and citations

MITRE external references are preserved separately from Glexia analysis so citations remain traceable to their original source records.

  1. [1]
    ESET Contagious Interview BeaverTail InvisibleFerret February 2025

    Matej Havranek. (2025, February 20). DeceptiveDevelopment targets freelance developers. Retrieved October 17, 2025.

    Open source URL
  2. [2]
    Zscaler ContagiousInterview BeaverTail InvisibleFerret November 2024

    Seongsu Park. (2024, November 4). From Pyongyang to Your Payroll: The Rise of North Korean Remote Workers in the West. Retrieved October 17, 2025.

    Open source URL
  3. [3]
    PaloAlto ContagiousInterview BeaverTail InvisibleFerret November 2023

    Unit 42. (2023, November 21). Hacking Employers and Seeking Employment: Two Job-Related Campaigns Bear Hallmarks of North Korean Threat Actors. Retrieved October 17, 2025.

    Open source URL
  4. [4]
    Recorded Future Contagious Inteview BeaverTail InvisibleFerret OtterCookie February 2025

    Insikt Group. (2025, February 13). Inside the Scam: North Korea’s IT Worker Threat. Retrieved October 17, 2025.

    Open source URL
  5. [5]
    PaloAlto Unit42 ContagiousInterview BeaverTail InvisibileFerret October 2024

    Unit42. (2024, October 9). Contagious Interview: DPRK Threat Actors Lure Tech Industry Job Seekers to Install New Variants of BeaverTail and InvisibleFerret Malware. Retrieved October 17, 2025.

    Open source URL
  6. [6]
    Esentire ContagiousInterview BeaverTail InvisibleFerret November 2024

    eSentire Threat Response Unit (TRU). (2024, November 14). Bored BeaverTail & InvisibleFerret Yacht Club – A Lazarus Lure Pt.2. Retrieved October 17, 2025.

    Open source URL
  7. [7]
    ESET Contagious Interview BeaverTail InvisibleFerret February 2025

    Matej Havranek. (2025, February 20). DeceptiveDevelopment targets freelance developers. Retrieved October 17, 2025.

    Open source URL
  8. [8]
    ESET Contagious Interview BeaverTail InvisibleFerret February 2025

    Matej Havranek. (2025, February 20). DeceptiveDevelopment targets freelance developers. Retrieved October 17, 2025.

    Open source URL
  9. [9]
    Esentire ContagiousInterview BeaverTail InvisibleFerret November 2024

    eSentire Threat Response Unit (TRU). (2024, November 14). Bored BeaverTail & InvisibleFerret Yacht Club – A Lazarus Lure Pt.2. Retrieved October 17, 2025.

    Open source URL
  10. [10]
    Esentire ContagiousInterview BeaverTail InvisibleFerret November 2024

    eSentire Threat Response Unit (TRU). (2024, November 14). Bored BeaverTail & InvisibleFerret Yacht Club – A Lazarus Lure Pt.2. Retrieved October 17, 2025.

    Open source URL
  11. [11]
    PaloAlto ContagiousInterview BeaverTail InvisibleFerret November 2023

    Unit 42. (2023, November 21). Hacking Employers and Seeking Employment: Two Job-Related Campaigns Bear Hallmarks of North Korean Threat Actors. Retrieved October 17, 2025.

    Open source URL
  12. [12]
    PaloAlto ContagiousInterview BeaverTail InvisibleFerret November 2023

    Unit 42. (2023, November 21). Hacking Employers and Seeking Employment: Two Job-Related Campaigns Bear Hallmarks of North Korean Threat Actors. Retrieved October 17, 2025.

    Open source URL
  13. [13]
    PaloAlto Unit42 ContagiousInterview BeaverTail InvisibileFerret October 2024

    Unit42. (2024, October 9). Contagious Interview: DPRK Threat Actors Lure Tech Industry Job Seekers to Install New Variants of BeaverTail and InvisibleFerret Malware. Retrieved October 17, 2025.

    Open source URL
  14. [14]
    PaloAlto Unit42 ContagiousInterview BeaverTail InvisibileFerret October 2024

    Unit42. (2024, October 9). Contagious Interview: DPRK Threat Actors Lure Tech Industry Job Seekers to Install New Variants of BeaverTail and InvisibleFerret Malware. Retrieved October 17, 2025.

    Open source URL
  15. [15]
    Recorded Future Contagious Inteview BeaverTail InvisibleFerret OtterCookie February 2025

    Insikt Group. (2025, February 13). Inside the Scam: North Korea’s IT Worker Threat. Retrieved October 17, 2025.

    Open source URL
  16. [16]
    Recorded Future Contagious Inteview BeaverTail InvisibleFerret OtterCookie February 2025

    Insikt Group. (2025, February 13). Inside the Scam: North Korea’s IT Worker Threat. Retrieved October 17, 2025.

    Open source URL
  17. [17]
    Zscaler ContagiousInterview BeaverTail InvisibleFerret November 2024

    Seongsu Park. (2024, November 4). From Pyongyang to Your Payroll: The Rise of North Korean Remote Workers in the West. Retrieved October 17, 2025.

    Open source URL
  18. [18]
    Zscaler ContagiousInterview BeaverTail InvisibleFerret November 2024

    Seongsu Park. (2024, November 4). From Pyongyang to Your Payroll: The Rise of North Korean Remote Workers in the West. Retrieved October 17, 2025.

    Open source URL
  19. [19]
    mitre-attackS1245
    Open source URL
  20. [20]
    mitre-attackS1245
    Open source URL
  21. [21]
    mitre-attackS1245
    Open source URL
  22. [22]
    ESET Contagious Interview BeaverTail InvisibleFerret February 2025

    Matej Havranek. (2025, February 20). DeceptiveDevelopment targets freelance developers. Retrieved October 17, 2025.

    Open source URL
  23. [23]
    ESET Contagious Interview BeaverTail InvisibleFerret February 2025

    Matej Havranek. (2025, February 20). DeceptiveDevelopment targets freelance developers. Retrieved October 17, 2025.

    Open source URL
  24. [24]
    Esentire ContagiousInterview BeaverTail InvisibleFerret November 2024

    eSentire Threat Response Unit (TRU). (2024, November 14). Bored BeaverTail & InvisibleFerret Yacht Club – A Lazarus Lure Pt.2. Retrieved October 17, 2025.

    Open source URL
  25. [25]
    Esentire ContagiousInterview BeaverTail InvisibleFerret November 2024

    eSentire Threat Response Unit (TRU). (2024, November 14). Bored BeaverTail & InvisibleFerret Yacht Club – A Lazarus Lure Pt.2. Retrieved October 17, 2025.

    Open source URL
  26. [26]
    PaloAlto ContagiousInterview BeaverTail InvisibleFerret November 2023

    Unit 42. (2023, November 21). Hacking Employers and Seeking Employment: Two Job-Related Campaigns Bear Hallmarks of North Korean Threat Actors. Retrieved October 17, 2025.

    Open source URL
  27. [27]
    PaloAlto ContagiousInterview BeaverTail InvisibleFerret November 2023

    Unit 42. (2023, November 21). Hacking Employers and Seeking Employment: Two Job-Related Campaigns Bear Hallmarks of North Korean Threat Actors. Retrieved October 17, 2025.

    Open source URL
  28. [28]
    Recorded Future Contagious Inteview BeaverTail InvisibleFerret OtterCookie February 2025

    Insikt Group. (2025, February 13). Inside the Scam: North Korea’s IT Worker Threat. Retrieved October 17, 2025.

    Open source URL
  29. [29]
    Recorded Future Contagious Inteview BeaverTail InvisibleFerret OtterCookie February 2025

    Insikt Group. (2025, February 13). Inside the Scam: North Korea’s IT Worker Threat. Retrieved October 17, 2025.

    Open source URL
  30. [30]
    ESET Contagious Interview BeaverTail InvisibleFerret February 2025

    Matej Havranek. (2025, February 20). DeceptiveDevelopment targets freelance developers. Retrieved October 17, 2025.

    Open source URL
  31. [31]
    ESET Contagious Interview BeaverTail InvisibleFerret February 2025

    Matej Havranek. (2025, February 20). DeceptiveDevelopment targets freelance developers. Retrieved October 17, 2025.

    Open source URL
  32. [32]
    Esentire ContagiousInterview BeaverTail InvisibleFerret November 2024

    eSentire Threat Response Unit (TRU). (2024, November 14). Bored BeaverTail & InvisibleFerret Yacht Club – A Lazarus Lure Pt.2. Retrieved October 17, 2025.

    Open source URL
  33. [33]
    Esentire ContagiousInterview BeaverTail InvisibleFerret November 2024

    eSentire Threat Response Unit (TRU). (2024, November 14). Bored BeaverTail & InvisibleFerret Yacht Club – A Lazarus Lure Pt.2. Retrieved October 17, 2025.

    Open source URL
  34. [34]
    PaloAlto ContagiousInterview BeaverTail InvisibleFerret November 2023

    Unit 42. (2023, November 21). Hacking Employers and Seeking Employment: Two Job-Related Campaigns Bear Hallmarks of North Korean Threat Actors. Retrieved October 17, 2025.

    Open source URL
  35. [35]
    PaloAlto ContagiousInterview BeaverTail InvisibleFerret November 2023

    Unit 42. (2023, November 21). Hacking Employers and Seeking Employment: Two Job-Related Campaigns Bear Hallmarks of North Korean Threat Actors. Retrieved October 17, 2025.

    Open source URL
  36. [36]
    PaloAlto Unit42 ContagiousInterview BeaverTail InvisibileFerret October 2024

    Unit42. (2024, October 9). Contagious Interview: DPRK Threat Actors Lure Tech Industry Job Seekers to Install New Variants of BeaverTail and InvisibleFerret Malware. Retrieved October 17, 2025.

    Open source URL
  37. [37]
    PaloAlto Unit42 ContagiousInterview BeaverTail InvisibileFerret October 2024

    Unit42. (2024, October 9). Contagious Interview: DPRK Threat Actors Lure Tech Industry Job Seekers to Install New Variants of BeaverTail and InvisibleFerret Malware. Retrieved October 17, 2025.

    Open source URL
  38. [38]
    Recorded Future Contagious Inteview BeaverTail InvisibleFerret OtterCookie February 2025

    Insikt Group. (2025, February 13). Inside the Scam: North Korea’s IT Worker Threat. Retrieved October 17, 2025.

    Open source URL
  39. [39]
    Recorded Future Contagious Inteview BeaverTail InvisibleFerret OtterCookie February 2025

    Insikt Group. (2025, February 13). Inside the Scam: North Korea’s IT Worker Threat. Retrieved October 17, 2025.

    Open source URL
  40. [40]
    Zscaler ContagiousInterview BeaverTail InvisibleFerret November 2024

    Seongsu Park. (2024, November 4). From Pyongyang to Your Payroll: The Rise of North Korean Remote Workers in the West. Retrieved October 17, 2025.

    Open source URL
  41. [41]
    Zscaler ContagiousInterview BeaverTail InvisibleFerret November 2024

    Seongsu Park. (2024, November 4). From Pyongyang to Your Payroll: The Rise of North Korean Remote Workers in the West. Retrieved October 17, 2025.

    Open source URL
  42. [42]
    ESET Contagious Interview BeaverTail InvisibleFerret February 2025

    Matej Havranek. (2025, February 20). DeceptiveDevelopment targets freelance developers. Retrieved October 17, 2025.

    Open source URL
  43. [43]
    ESET Contagious Interview BeaverTail InvisibleFerret February 2025

    Matej Havranek. (2025, February 20). DeceptiveDevelopment targets freelance developers. Retrieved October 17, 2025.

    Open source URL
  44. [44]
    Esentire ContagiousInterview BeaverTail InvisibleFerret November 2024

    eSentire Threat Response Unit (TRU). (2024, November 14). Bored BeaverTail & InvisibleFerret Yacht Club – A Lazarus Lure Pt.2. Retrieved October 17, 2025.

    Open source URL
  45. [45]
    Esentire ContagiousInterview BeaverTail InvisibleFerret November 2024

    eSentire Threat Response Unit (TRU). (2024, November 14). Bored BeaverTail & InvisibleFerret Yacht Club – A Lazarus Lure Pt.2. Retrieved October 17, 2025.

    Open source URL
  46. [46]
    PaloAlto ContagiousInterview BeaverTail InvisibleFerret November 2023

    Unit 42. (2023, November 21). Hacking Employers and Seeking Employment: Two Job-Related Campaigns Bear Hallmarks of North Korean Threat Actors. Retrieved October 17, 2025.

    Open source URL
  47. [47]
    PaloAlto ContagiousInterview BeaverTail InvisibleFerret November 2023

    Unit 42. (2023, November 21). Hacking Employers and Seeking Employment: Two Job-Related Campaigns Bear Hallmarks of North Korean Threat Actors. Retrieved October 17, 2025.

    Open source URL
  48. [48]
    Zscaler ContagiousInterview BeaverTail InvisibleFerret November 2024

    Seongsu Park. (2024, November 4). From Pyongyang to Your Payroll: The Rise of North Korean Remote Workers in the West. Retrieved October 17, 2025.

    Open source URL
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