General

  • Target

    16f636ea86a82e9ad76a03985b026b75de31c14d5d6aec9a44d88f518f636f00.exe

  • Size

    4.9MB

  • Sample

    241125-pyvnfsxkbw

  • MD5

    d6c32cc92aff05247e665fec5d1ca5ed

  • SHA1

    864e040db2c99477669bbe45261d8d93ebdba021

  • SHA256

    16f636ea86a82e9ad76a03985b026b75de31c14d5d6aec9a44d88f518f636f00

  • SHA512

    b03a5e8bfa50e1c559d72f912168e56aa93f6d545554e84db723261744ed2c308cca6cb1602a731d00787a1319b44fd326fd5704ba207850a0981ea42fceef96

  • SSDEEP

    49152:bl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8O:2

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

      16f636ea86a82e9ad76a03985b026b75de31c14d5d6aec9a44d88f518f636f00.exe

    • Size

      4.9MB

    • MD5

      d6c32cc92aff05247e665fec5d1ca5ed

    • SHA1

      864e040db2c99477669bbe45261d8d93ebdba021

    • SHA256

      16f636ea86a82e9ad76a03985b026b75de31c14d5d6aec9a44d88f518f636f00

    • SHA512

      b03a5e8bfa50e1c559d72f912168e56aa93f6d545554e84db723261744ed2c308cca6cb1602a731d00787a1319b44fd326fd5704ba207850a0981ea42fceef96

    • SSDEEP

      49152:bl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8O:2

    • 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