General

  • Target

    19635aef15d44c474acbf2d6e8a4e52ad016c056d264ad4e7b549473cb77e16fN.exe

  • Size

    4.9MB

  • Sample

    241125-nwkvss1ngp

  • MD5

    25496308c3b681092d00992320e7dcf0

  • SHA1

    f016822cb907ffbd1aa6ffaf9b4e00dfc789e7bf

  • SHA256

    19635aef15d44c474acbf2d6e8a4e52ad016c056d264ad4e7b549473cb77e16f

  • SHA512

    811433d23078a129180f7067aa9c9d904e0c001b8adb9876bcaee096014814d57faf457c4d3a8f20ca05b0d4c08d4a311599bc1cfe57db478ee5b5282196038e

  • SSDEEP

    49152:bl5MTGChZpxtlBBgxchXb/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

      19635aef15d44c474acbf2d6e8a4e52ad016c056d264ad4e7b549473cb77e16fN.exe

    • Size

      4.9MB

    • MD5

      25496308c3b681092d00992320e7dcf0

    • SHA1

      f016822cb907ffbd1aa6ffaf9b4e00dfc789e7bf

    • SHA256

      19635aef15d44c474acbf2d6e8a4e52ad016c056d264ad4e7b549473cb77e16f

    • SHA512

      811433d23078a129180f7067aa9c9d904e0c001b8adb9876bcaee096014814d57faf457c4d3a8f20ca05b0d4c08d4a311599bc1cfe57db478ee5b5282196038e

    • SSDEEP

      49152:bl5MTGChZpxtlBBgxchXb/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