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MITRE ATT&CK® Malware

S9005: DocSwap

DocSwap is an Android malware first identified in 2025, and attributed to Kimsuky. DocSwap’s name is a combination of its Korean name “문서열람 인증 앱” (Document Viewing Authentication App) and a phishing page masquerading as CoinSwap at the C2 address. Based on DocSwap’s name and Korean-language strings, DocSwap potentially targets mobile device users in South Korea. Several variants of DocSwap exist; one of the latest samples indicates that the adversary added a native decryption function that decrypts an internal APK.[1][2]

MobileS9005MalwareObject v1.0Modified
Glexia's Take · Automated analysis

Security context for executives and security teams

Automation confidenceMedium

S9005: DocSwap describes [DocSwap](https://attack.mitre.org/software/S9005) is an Android malware first identified in 2025, and attributed to [Kimsuky](https://attack.mitre.org/groups/G0094). [DocSwap](https://attack.mitre.org/software/S9005)’s name is a combination of its Korean name “문서열람 인증 앱” (Document Viewing Authentication App) and a phishing page masquerading as CoinSwap at the C2 address. Based on [DocSwap](https://attack.mitre.org/software/S9005)’s name and Korean-language strings, [DocSwap](https://attack.mitre.org/software/S9005...

Executive priority

S9005: DocSwap 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 S9005: DocSwap by reviewing the official ATT&CK relationships, mapped tactics (the mapped ATT&CK tactic context), supported platforms (Android), and available local telemetry before making detection or mitigation decisions.

Likely telemetry

  • Official ATT&CK relationships and object metadata

Detection direction

  • Validate whether S9005: DocSwap 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

DocSwap

DocSwap is an Android malware first identified in 2025, and attributed to Kimsuky. DocSwap’s name is a combination of its Korean name “문서열람 인증 앱” (Document Viewing Authentication App) and a phishing page masquerading as CoinSwap at the C2 address. Based on DocSwap’s name and Korean-language strings, DocSwap potentially targets mobile device users in South Korea. Several variants of DocSwap exist; one of the latest samples indicates that the adversary added a native decryption function that decrypts an internal APK.[1][2]

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.

27 rows
DomainIDNameRelationship / procedure
MobileT1406Obfuscated Files or Information

DocSwap has used an obfuscated APK file and Base64-encoded URLs and files.[1][2]

MobileT1429Audio Capture

DocSwap has the ability to start and stop audio recording.[1][2]

MobileT1417.001KeyloggingSub-technique

When an accessibility event occurs, DocSwap has used a keylogger to record the target application’s icon, package name, event text, and timestamp.[1][2]

MobileT1426System Information Discovery

DocSwap has checked for the `LOCAL_MAC_ADDRESS` permission and has the ability to send system information.[1][2]

MobileT1575Native API

DocSwap has decrypted the encrypted APK file security.dat using the `decryptFile` function in the `native-lib` library.[1]

MobileT1541Foreground Persistence

DocSwap has checked for the `FOREGROUND_SERVICE` permission.[1] DocSwap has also used the StartForeground API to generate a notification saying “Tap to view more details or stop the app” in Korean and to maintain persistence.[2]

MobileT1420File and Directory Discovery

DocSwap has checked for the `READ_EXTERNAL_STORAGE` and `MANAGE_EXTERNAL_STORAGE` permissions.[1][2]

MobileT1636.004SMS MessagesSub-technique

DocSwap has checked for the `READ_SMS` and `RECEIVE_SMS` permissions.[1][2] DocSwap also has the ability to send SMS information, including the sender or receiver, the message content, and the timestamp.[2]

MobileT1422.002Wi-Fi DiscoverySub-technique

DocSwap has checked for the `ACCESS_WIFI_STATE` and `CHANGE_WIFI_STATE` permissions.[1]

MobileT1422System Network Configuration Discovery

DocSwap has checked for the `LOCAL_MAC_ADDRESS` and `READ_PRIVILEGED_PHONE_STATE` permissions.[1]

MobileT1512Video Capture

DocSwap has the ability to start and stop camera recording.[1][2]

MobileT1627Execution Guardrails

DocSwap has checked if the victim has accessed the malicious URL from a PC. If so, DocSwap redirected the victim to scan the malicious QR code using a mobile device.[1]

MobileT1636.003Contact ListSub-technique

DocSwap has requested for the `READ_CONTACTS` and `WRITE_CONTACTS` permissions and has the ability to send contact information.[1][2]

MobileT1616Call Control

DocSwap has requested for the `CALL_PHONE` permission to make phone calls.[1][2]

MobileT1636.002Call LogSub-technique

DocSwap has requested for the `READ_CALL_LOG` and `WRITE_CALL_LOG` permissions and has the ability to send call logs.[1][2]

MobileT1453Abuse Accessibility Features

Once accessibility permissions are granted, DocSwap has abused the Accessibility Service to execute a keylogging capability.[1][2]

MobileT1544Ingress Tool Transfer

DocSwap has the ability to upload and download files via socket communication.[1][2]

MobileT1624.001Broadcast ReceiversSub-technique

DocSwap has registered the following intents to automatically execute MainService on device reboot: `android.intent.action.BOOT_COMPLETED`, `android.intent.action.ACTION_POWER_CONNECTED`, and `android.intent.action.ACTION_POWER_DISCONNECTED`.[1][2]

MobileT1430Location Tracking

DocSwap has the ability to collect location information and to start/stop location information from being sent to the C2 server.[1][2]

MobileT1655.001Match Legitimate Name or LocationSub-technique

DocSwap has masqueraded as a VPN application, using the same package name (` com.bycomsolutions.bycomvpn `) and having similar file structure, metadata and code routines as the legitimate application.[1]

MobileT1630.002File DeletionSub-technique

DocSwap has the ability to delete files and directories.[1][2]

MobileT1660Phishing

DocSwap has used phishing messages (smishing) and emails to gain initial access to devices.[1]

MobileT1636.005AccountsSub-technique

DocSwap has the ability to send registered account information.[1][2]

MobileT1437.001Web ProtocolsSub-technique

DocSwap has sent a POST request to downcat.php while recording the access time and APK URL path.[1]

MobileT1533Data from Local System

DocSwap has checked for the `WRITE_EXTERNAL_STORAGE` permission.[1][2]

MobileT1646Exfiltration Over C2 Channel

DocSwap has used a hardcoded IP address and port for C2 and exfiltration over socket communication.[2]

MobileT1418Software Discovery

DocSwap has the ability to send installed application information, including application name, package name, installation timestamp, icon, and properties.[2]

Relationship explorer

All related ATT&CK context

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
1.0
Created
Modified
Raw hash
939dea167974769f...
Imported snapshots across ATT&CK releases(2)
ReleaseBundle importedObject versionModifiedStatusRaw hash
19.21.0Current bundle939dea167974…
19.11.0Older bundle939dea167974…
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.

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]
    EnkiWhiteHat_KimsukyDOCSWAP_Dec2025

    EnkiWhiteHat. (2025, December 16). Kimsuky Distributing Malicious Mobile App via QR Code. Retrieved January 8, 2026.

    Open source URL
  2. [2]
    S2W_DocSwap_Mar2025

    Kim, H., S2W TALON. (2025, March 13). Detailed Analysis of DocSwap Malware Disguised as Security Document Viewer. Retrieved January 12, 2026.

    Open source URL
  3. [3]
    mitre-attackS9005
    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.