General

  • Target

    ef4bdcb7a4565b7a4879d30ba9ed8c0466f82ca8695dcb7942479e2105b562d7.exe

  • Size

    4.9MB

  • Sample

    241128-vkrmjatnax

  • MD5

    364f9aa7879d48ffeb12ca794d1a1fb6

  • SHA1

    7c5e4c6237881d714d43a95cfe69a4d15d8ff641

  • SHA256

    ef4bdcb7a4565b7a4879d30ba9ed8c0466f82ca8695dcb7942479e2105b562d7

  • SHA512

    a6175b2facffdc57a98e77791cff47cf3b4ffba13e0ae433052bb70bdf94948a2724d0ba7e993094bb63f248dae9f78b8f615b7676299442b37aee61efc5492d

  • SSDEEP

    49152:jl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8O:O

Malware Config

Extracted

Family

colibri

Version

1.2.0

Botnet

Build1

C2

http://zpltcmgodhvvedxtfcygvbgjkvgvcguygytfigj.cc/gate.php

http://yugyuvyugguitgyuigtfyutdtoghghbbgyv.cx/gate.php

rc4.plain

Targets

    • Target

      ef4bdcb7a4565b7a4879d30ba9ed8c0466f82ca8695dcb7942479e2105b562d7.exe

    • Size

      4.9MB

    • MD5

      364f9aa7879d48ffeb12ca794d1a1fb6

    • SHA1

      7c5e4c6237881d714d43a95cfe69a4d15d8ff641

    • SHA256

      ef4bdcb7a4565b7a4879d30ba9ed8c0466f82ca8695dcb7942479e2105b562d7

    • SHA512

      a6175b2facffdc57a98e77791cff47cf3b4ffba13e0ae433052bb70bdf94948a2724d0ba7e993094bb63f248dae9f78b8f615b7676299442b37aee61efc5492d

    • SSDEEP

      49152:jl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8O:O

    • Colibri Loader

      A loader sold as MaaS first seen in August 2021.

    • Colibri family

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Dcrat family

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • UAC bypass

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Checks whether UAC is enabled

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks