General

  • Target

    0f65cda1b8996dcb7b0352359dc6226e69f010a7d9f4335e64acecaad904f4b5N.exe

  • Size

    4.9MB

  • Sample

    241219-nnf7mssnb1

  • MD5

    8ae5271e85f7f0ff3bd5df1f96d57b40

  • SHA1

    9bb09274523bc1b88f7c48922549a9c7464f2027

  • SHA256

    0f65cda1b8996dcb7b0352359dc6226e69f010a7d9f4335e64acecaad904f4b5

  • SHA512

    4b02bc90828f55e2510221b6c334d4c4ebe706be3ab8371b1e222bf8cd939407a40e76a0d1d1df3d14309c7ca6eec89c96bb7dc590ed990206e773577a17d8e6

  • SSDEEP

    49152:Ll5MTGChZpxtlBBgxchXb/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

      0f65cda1b8996dcb7b0352359dc6226e69f010a7d9f4335e64acecaad904f4b5N.exe

    • Size

      4.9MB

    • MD5

      8ae5271e85f7f0ff3bd5df1f96d57b40

    • SHA1

      9bb09274523bc1b88f7c48922549a9c7464f2027

    • SHA256

      0f65cda1b8996dcb7b0352359dc6226e69f010a7d9f4335e64acecaad904f4b5

    • SHA512

      4b02bc90828f55e2510221b6c334d4c4ebe706be3ab8371b1e222bf8cd939407a40e76a0d1d1df3d14309c7ca6eec89c96bb7dc590ed990206e773577a17d8e6

    • SSDEEP

      49152:Ll5MTGChZpxtlBBgxchXb/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