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MITRE ATT&CK® Malware

S0433: Rifdoor

Rifdoor is a remote access trojan (RAT) that shares numerous code similarities with HotCroissant.[1]

EnterpriseS0433MalwareObject v1.1Modified
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Glexia's Take · Automated analysis

Security context for executives and security teams

Automation confidenceMedium

S0433: Rifdoor describes [Rifdoor](https://attack.mitre.org/software/S0433) is a remote access trojan (RAT) that shares numerous code similarities with [HotCroissant](https://attack.mitre.org/software/S0431).(Citation: Carbon Black HotCroissant April 2020)

Executive priority

S0433: Rifdoor is an official MITRE ATT&CK software. Glexia treats it as defensive behavior context for prioritizing monitoring, control validation, and response planning without using the object by itself as an attribution claim.

Technical view

Security teams should validate S0433: Rifdoor by reviewing the official ATT&CK relationships, mapped tactics (the mapped ATT&CK tactic context), supported platforms (Windows), and available local telemetry before making detection or mitigation decisions.

Likely telemetry

  • Official ATT&CK relationships and object metadata
  • Network, endpoint, and security-tool telemetry

Detection direction

  • Validate whether S0433: Rifdoor appears in your detection coverage and tabletop scenarios.
  • Use the object to align executive risk language with SOC, incident response, and detection engineering work.
  • Do not treat ATT&CK relationship context as attribution without corroborating evidence.

Mitigation priorities

  • Map the object to existing controls and identify missing telemetry or response ownership.
  • Prioritize mitigations that reduce exposure on the listed platforms and tactics.
  • Review adjacent ATT&CK relationships before changing policy, detections, or reporting language.
Additional notes and limits

Baseline Glexia take generated from the official MITRE ATT&CK STIX object, source hash, tactics, platforms, and detection fields. It is safe to replace with a richer model-generated take for the same source hash later.

This baseline take is source-grounded and schema-validated, but it does not include environment-specific telemetry, incident evidence, or threat-intelligence corroboration.

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

Official MITRE ATT&CK definition

Rifdoor

Rifdoor is a remote access trojan (RAT) that shares numerous code similarities with HotCroissant.[1]

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.

9 rows
DomainIDNameRelationship / procedure
EnterpriseT1027.013Encrypted/Encoded FileSub-technique

Rifdoor has encrypted strings with a single byte XOR algorithm.[1]

EnterpriseT1082System Information Discovery

Rifdoor has the ability to identify the Windows version on the compromised host.[1]

EnterpriseT1027.001Binary PaddingSub-technique

Rifdoor has added four additional bytes of data upon launching, then saved the changed version as C:\ProgramData\Initech\Initech.exe.[1]

EnterpriseT1016System Network Configuration Discovery

Rifdoor has the ability to identify the IP address of the compromised host.[1]

EnterpriseT1547.001Registry Run Keys / Startup FolderSub-technique

Rifdoor has created a new registry entry at HKEY_CURRENT_USERS\Software\Microsoft\Windows\CurrentVersion\Run\Graphics with a value of C:\ProgramData\Initech\Initech.exe /run.[1]

EnterpriseT1566.001Spearphishing AttachmentSub-technique

Rifdoor has been distributed in e-mails with malicious Excel or Word documents.[1]

EnterpriseT1573.001Symmetric CryptographySub-technique

Rifdoor has encrypted command and control (C2) communications with a stream cipher.[1]

EnterpriseT1033System Owner/User Discovery

Rifdoor has the ability to identify the username on the compromised host.[1]

EnterpriseT1204.002Malicious FileSub-technique

Rifdoor has been executed from malicious Excel or Word documents containing macros.[1]

Associated objects

Groups, software, and campaigns

GroupEnterprise

G0138: Andariel

Andariel is a North Korean state-sponsored threat group that has been active since at least 2009. Andariel has primarily focused its operations--which have included destructive attacks--against South Korean government agencies, military organizations, and a variety of domestic companies; they have also conducted cyber financial operations against ATMs, banks, and cryptocurrency exchanges. Andariel's notable activity includes Operation Black Mine, Operation GoldenAxe, and Campaign Rifle.[1][2][3][4][5]

Andariel is considered a sub-set of Lazarus Group, and has been attributed to North Korea's Reconnaissance General Bureau.[6]

North Korean group definitions are known to have significant overlap, and some security researchers report all North Korean state-sponsored cyber activity under the name Lazarus Group instead of tracking clusters or subgroups.

Relationship explorer

All related ATT&CK context

uses · GroupG0138: AndarielEnterpriseuses · TechniqueT1027.013: Encrypted/Encoded FileEnterpriseuses · TechniqueT1082: System Information DiscoveryEnterpriseuses · TechniqueT1027.001: Binary PaddingEnterpriseuses · TechniqueT1016: System Network Configuration DiscoveryEnterpriseuses · TechniqueT1547.001: Registry Run Keys / Startup FolderEnterpriseuses · TechniqueT1566.001: Spearphishing AttachmentEnterpriseuses · TechniqueT1573.001: Symmetric CryptographyEnterpriseuses · TechniqueT1033: System Owner/User DiscoveryEnterpriseuses · TechniqueT1204.002: Malicious FileEnterprise
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
19.2
Object version
1.1
Created
Modified
Raw hash
5a84c2ccab4462a0...
Imported snapshots across ATT&CK releases(2)
ReleaseBundle importedObject versionModifiedStatusRaw hash
19.21.1Current bundle5a84c2ccab44…
19.11.1Older bundle5a84c2ccab44…
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]
    Carbon Black HotCroissant April 2020

    Knight, S.. (2020, April 16). VMware Carbon Black TAU Threat Analysis: The Evolution of Lazarus. Retrieved May 1, 2020.

    Open source URL
  2. [2]
    mitre-attackS0433
    Open source URL
Source and licensing

Source: MITRE ATT&CK®. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation. Glexia is not affiliated with or endorsed by MITRE.

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