General

  • Target

    6b446d1d3f1ed5c7cc712e7c6516ad5e620a94eadb0023abb3961afc17c82890N

  • Size

    4.9MB

  • Sample

    241027-t6nmbszbmg

  • MD5

    98f6d1c7482e03953bd88b57feb7d6b0

  • SHA1

    437f469f92fea1fe222fb031353065152eb4d95e

  • SHA256

    6b446d1d3f1ed5c7cc712e7c6516ad5e620a94eadb0023abb3961afc17c82890

  • SHA512

    240e23c6a92008588b5e70969bbc94b2adfb12fb74e5f31ee4d3fc3b918b160bb13868ab29f14b29029a5889f0aff635a97507c6c1ae13dcadaaa6998d6f8165

  • SSDEEP

    49152:Dl5MTGChZpxtlBBgxchXb/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

      6b446d1d3f1ed5c7cc712e7c6516ad5e620a94eadb0023abb3961afc17c82890N

    • Size

      4.9MB

    • MD5

      98f6d1c7482e03953bd88b57feb7d6b0

    • SHA1

      437f469f92fea1fe222fb031353065152eb4d95e

    • SHA256

      6b446d1d3f1ed5c7cc712e7c6516ad5e620a94eadb0023abb3961afc17c82890

    • SHA512

      240e23c6a92008588b5e70969bbc94b2adfb12fb74e5f31ee4d3fc3b918b160bb13868ab29f14b29029a5889f0aff635a97507c6c1ae13dcadaaa6998d6f8165

    • SSDEEP

      49152:Dl5MTGChZpxtlBBgxchXb/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