General

  • Target

    75c3cf5d0a539d0dbf9dd039f3f0712b6a13c11827e9c123f569ca9b4af5673eN.exe

  • Size

    4.9MB

  • Sample

    241202-2whmbsxkfw

  • MD5

    0f5cabfbc1180b73d7fadd9de190d3d0

  • SHA1

    5a617e52ac7842c5a32c4caae9c0c1f1ea725a9d

  • SHA256

    75c3cf5d0a539d0dbf9dd039f3f0712b6a13c11827e9c123f569ca9b4af5673e

  • SHA512

    79bea9ea2a3659ab6a2d11c9aef9aaa235ee413de1f246b0c6cac6ca00c827a04c9309801dc2e1d9264bd932ccef458f136598173678d6409ee8cbbcecc8df9b

  • 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

      75c3cf5d0a539d0dbf9dd039f3f0712b6a13c11827e9c123f569ca9b4af5673eN.exe

    • Size

      4.9MB

    • MD5

      0f5cabfbc1180b73d7fadd9de190d3d0

    • SHA1

      5a617e52ac7842c5a32c4caae9c0c1f1ea725a9d

    • SHA256

      75c3cf5d0a539d0dbf9dd039f3f0712b6a13c11827e9c123f569ca9b4af5673e

    • SHA512

      79bea9ea2a3659ab6a2d11c9aef9aaa235ee413de1f246b0c6cac6ca00c827a04c9309801dc2e1d9264bd932ccef458f136598173678d6409ee8cbbcecc8df9b

    • 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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks