General

  • Target

    2e98237175f01ec0b438492e9beb7c985a82827337d7926f3fe0b6316bb6c7e4N.exe

  • Size

    4.9MB

  • Sample

    241219-nn3ewasrel

  • MD5

    d8b8aede9dcb3c6ead52f11fc0826520

  • SHA1

    6b5981a21251b5d0833a8dc8e7b4c71787c3d6e6

  • SHA256

    2e98237175f01ec0b438492e9beb7c985a82827337d7926f3fe0b6316bb6c7e4

  • SHA512

    c3bbcbf837ae31dccf70e966dcb57e6bce105aef5163ebb44111fc7dc810cb34691292cd4ad30ab0e1516a75f569addfafaf6c3a4b026c2a1446f1182bb005b1

  • SSDEEP

    49152:rl5MTGChZpxtlBBgxchXb/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

      2e98237175f01ec0b438492e9beb7c985a82827337d7926f3fe0b6316bb6c7e4N.exe

    • Size

      4.9MB

    • MD5

      d8b8aede9dcb3c6ead52f11fc0826520

    • SHA1

      6b5981a21251b5d0833a8dc8e7b4c71787c3d6e6

    • SHA256

      2e98237175f01ec0b438492e9beb7c985a82827337d7926f3fe0b6316bb6c7e4

    • SHA512

      c3bbcbf837ae31dccf70e966dcb57e6bce105aef5163ebb44111fc7dc810cb34691292cd4ad30ab0e1516a75f569addfafaf6c3a4b026c2a1446f1182bb005b1

    • SSDEEP

      49152:rl5MTGChZpxtlBBgxchXb/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