General

  • Target

    4db286d138eb7ff2207a20fcab04af2fffe73c4138d53aadb43c6cbb779ea742N.exe

  • Size

    4.9MB

  • Sample

    241128-sx2l6a1qe1

  • MD5

    1942a319d1a63f4329b9a218916e7bb0

  • SHA1

    67d8341f0b49c19debbfe1ad450464eca5c03eb5

  • SHA256

    4db286d138eb7ff2207a20fcab04af2fffe73c4138d53aadb43c6cbb779ea742

  • SHA512

    9fda304f1093a8bc94d52133076b1b4321f9d99afc98c26670c22355b337c373a7d22a8ddf967d0d503e0cb42fb5efb36f81506ea7279b5377ec274562ce30c7

  • 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

      4db286d138eb7ff2207a20fcab04af2fffe73c4138d53aadb43c6cbb779ea742N.exe

    • Size

      4.9MB

    • MD5

      1942a319d1a63f4329b9a218916e7bb0

    • SHA1

      67d8341f0b49c19debbfe1ad450464eca5c03eb5

    • SHA256

      4db286d138eb7ff2207a20fcab04af2fffe73c4138d53aadb43c6cbb779ea742

    • SHA512

      9fda304f1093a8bc94d52133076b1b4321f9d99afc98c26670c22355b337c373a7d22a8ddf967d0d503e0cb42fb5efb36f81506ea7279b5377ec274562ce30c7

    • 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