General

  • Target

    bd501e7aaaa5408118d4d9ee82fd656b1f43473ad3dfb306f9bd2e5bd061c7ec.exe

  • Size

    4.9MB

  • Sample

    241122-z3b21svqep

  • MD5

    a521b23108ca72a0a8e837bb4bc6c309

  • SHA1

    a80623d726004b9c0086377c19f822a67af0c490

  • SHA256

    bd501e7aaaa5408118d4d9ee82fd656b1f43473ad3dfb306f9bd2e5bd061c7ec

  • SHA512

    33835665ab96cb1d5ffe46fa6706e519c8314c6280967c18a265d1ceaae625691c3a65cc90a15cac48386a22162aa9631fcc0024360fff6970a76ed98cc0d21e

  • SSDEEP

    49152:bl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8r:j

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

      bd501e7aaaa5408118d4d9ee82fd656b1f43473ad3dfb306f9bd2e5bd061c7ec.exe

    • Size

      4.9MB

    • MD5

      a521b23108ca72a0a8e837bb4bc6c309

    • SHA1

      a80623d726004b9c0086377c19f822a67af0c490

    • SHA256

      bd501e7aaaa5408118d4d9ee82fd656b1f43473ad3dfb306f9bd2e5bd061c7ec

    • SHA512

      33835665ab96cb1d5ffe46fa6706e519c8314c6280967c18a265d1ceaae625691c3a65cc90a15cac48386a22162aa9631fcc0024360fff6970a76ed98cc0d21e

    • SSDEEP

      49152:bl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8r:j

    • 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