General

  • Target

    1bf46be35cd2b12bdba1eea93dc2cbed8b02fd40bb1ecc955edd2d20120b33eeN.exe

  • Size

    4.9MB

  • Sample

    241128-qda9raykfw

  • MD5

    052d4c3f15c5c8287292023613a04e70

  • SHA1

    3cefd72b8de7cdc3b9a713224603fcfbcb148350

  • SHA256

    1bf46be35cd2b12bdba1eea93dc2cbed8b02fd40bb1ecc955edd2d20120b33ee

  • SHA512

    8a91c712564fb3add3b9b66eb259a0321fb1bcb5cd3642667a9a0b3a34cb2b30431e4455d457a95ddef01921a1a88830e2dcb3aab2d3949f160f8da9486c224c

  • SSDEEP

    49152:bl5MTGChZpxtlBBgxchXb/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

      1bf46be35cd2b12bdba1eea93dc2cbed8b02fd40bb1ecc955edd2d20120b33eeN.exe

    • Size

      4.9MB

    • MD5

      052d4c3f15c5c8287292023613a04e70

    • SHA1

      3cefd72b8de7cdc3b9a713224603fcfbcb148350

    • SHA256

      1bf46be35cd2b12bdba1eea93dc2cbed8b02fd40bb1ecc955edd2d20120b33ee

    • SHA512

      8a91c712564fb3add3b9b66eb259a0321fb1bcb5cd3642667a9a0b3a34cb2b30431e4455d457a95ddef01921a1a88830e2dcb3aab2d3949f160f8da9486c224c

    • SSDEEP

      49152:bl5MTGChZpxtlBBgxchXb/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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks