General

  • Target

    b8a3b35b685e72c1be24942f0520a286d5e65873aafb0f959ba551dae50ff94a.exe

  • Size

    4.9MB

  • Sample

    241124-az3ccs1mhn

  • MD5

    a450c06717644483e3437db615ea4114

  • SHA1

    93ece99062cee7344d7059986cc4727c92dbfca9

  • SHA256

    b8a3b35b685e72c1be24942f0520a286d5e65873aafb0f959ba551dae50ff94a

  • SHA512

    cb7d295f30fa69e98f52ac240e76ed9e776142a898a15c0a8911a693ccdcea441281a79c2b7f0e1e6567cc0bb73a9a6320c359a4a775b943fc84b78df6e42a24

  • SSDEEP

    49152:Dl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8+:e

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

      b8a3b35b685e72c1be24942f0520a286d5e65873aafb0f959ba551dae50ff94a.exe

    • Size

      4.9MB

    • MD5

      a450c06717644483e3437db615ea4114

    • SHA1

      93ece99062cee7344d7059986cc4727c92dbfca9

    • SHA256

      b8a3b35b685e72c1be24942f0520a286d5e65873aafb0f959ba551dae50ff94a

    • SHA512

      cb7d295f30fa69e98f52ac240e76ed9e776142a898a15c0a8911a693ccdcea441281a79c2b7f0e1e6567cc0bb73a9a6320c359a4a775b943fc84b78df6e42a24

    • SSDEEP

      49152:Dl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8+:e

    • 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