General

  • Target

    31b10a4ebf0f0a98a283f4fd5cd09f18be036846d59d9528b5e28112debf98e2N

  • Size

    4.9MB

  • Sample

    241108-t1vhpavkfx

  • MD5

    4f2a2b2ffa4db5771f5e9f6927ee7390

  • SHA1

    dbcc615437c6925f3e18010854607e66c3e5bce3

  • SHA256

    31b10a4ebf0f0a98a283f4fd5cd09f18be036846d59d9528b5e28112debf98e2

  • SHA512

    51493c4ef3de3a62f6b630f24daf609d509a23cc1f663311496794a49e932fab57c0196f88688ddcd939028eead0bf46b2979bf5042c1ab5de3a0605a67c2f8e

  • SSDEEP

    49152:rl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8E:

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

      31b10a4ebf0f0a98a283f4fd5cd09f18be036846d59d9528b5e28112debf98e2N

    • Size

      4.9MB

    • MD5

      4f2a2b2ffa4db5771f5e9f6927ee7390

    • SHA1

      dbcc615437c6925f3e18010854607e66c3e5bce3

    • SHA256

      31b10a4ebf0f0a98a283f4fd5cd09f18be036846d59d9528b5e28112debf98e2

    • SHA512

      51493c4ef3de3a62f6b630f24daf609d509a23cc1f663311496794a49e932fab57c0196f88688ddcd939028eead0bf46b2979bf5042c1ab5de3a0605a67c2f8e

    • SSDEEP

      49152:rl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8E:

    • 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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks