General

  • Target

    8abea63ae718961fedbb03715ef8ae75a0692ce147d63022861b34f5a6b441ef

  • Size

    1.5MB

  • Sample

    221202-1wyg4shb83

  • MD5

    5f5bb24ef830fbb5f551d5b38d60df97

  • SHA1

    20e9f9002e049cd73a628a1448a853cbb84f4514

  • SHA256

    8abea63ae718961fedbb03715ef8ae75a0692ce147d63022861b34f5a6b441ef

  • SHA512

    d8f2b8ff8d053a3415706c280b6eca0ea4b5e258b17d62372521279e67d8a5a8ae85bfeaf59f69c8a983f4cf7a44018caa75eb832861da222794f6e288b72a18

  • SSDEEP

    24576:rg3YT2QMW8gwS+LgKrROcuZEROM/2K4AyVQx1i/I4ESJJKaPRR6nAETVgLk0gQv:rg3YTr7u1fELK4Cx1r2JJhj6ApLLgQ

Malware Config

Targets

    • Target

      8abea63ae718961fedbb03715ef8ae75a0692ce147d63022861b34f5a6b441ef

    • Size

      1.5MB

    • MD5

      5f5bb24ef830fbb5f551d5b38d60df97

    • SHA1

      20e9f9002e049cd73a628a1448a853cbb84f4514

    • SHA256

      8abea63ae718961fedbb03715ef8ae75a0692ce147d63022861b34f5a6b441ef

    • SHA512

      d8f2b8ff8d053a3415706c280b6eca0ea4b5e258b17d62372521279e67d8a5a8ae85bfeaf59f69c8a983f4cf7a44018caa75eb832861da222794f6e288b72a18

    • SSDEEP

      24576:rg3YT2QMW8gwS+LgKrROcuZEROM/2K4AyVQx1i/I4ESJJKaPRR6nAETVgLk0gQv:rg3YTr7u1fELK4Cx1r2JJhj6ApLLgQ

    • Darkcomet

      DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

    • Modifies WinLogon for persistence

    • Executes dropped EXE

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Loads dropped DLL

    • Adds Run key to start application

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Registry Run Keys / Startup Folder

1
T1060

Browser Extensions

1
T1176

Defense Evasion

Modify Registry

3
T1112

Discovery

Query Registry

5
T1012

System Information Discovery

6
T1082

Peripheral Device Discovery

1
T1120

Remote System Discovery

1
T1018

Tasks