General

  • Target

    8d83e5b4ac12f481def08e0364e37dbd9050e30cfc4c8845193c305e63f0f7e2N.exe

  • Size

    4.9MB

  • Sample

    241219-g3tyqasrgq

  • MD5

    bfb301610f83af1d4383ee8816d436c0

  • SHA1

    843d1c6fcb394dd8c1d66352fb4d188440604d9d

  • SHA256

    8d83e5b4ac12f481def08e0364e37dbd9050e30cfc4c8845193c305e63f0f7e2

  • SHA512

    dd736c99af88d44e86d09fc43a42feadce506c37633ff531fe19bc2a402f3eaa4a1f5cdb22bc9858a73b7f711382df174cc6c42a16924d0baa251bcdb427b6e6

  • SSDEEP

    49152:Dl5MTGChZpxtlBBgxchXb/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

      8d83e5b4ac12f481def08e0364e37dbd9050e30cfc4c8845193c305e63f0f7e2N.exe

    • Size

      4.9MB

    • MD5

      bfb301610f83af1d4383ee8816d436c0

    • SHA1

      843d1c6fcb394dd8c1d66352fb4d188440604d9d

    • SHA256

      8d83e5b4ac12f481def08e0364e37dbd9050e30cfc4c8845193c305e63f0f7e2

    • SHA512

      dd736c99af88d44e86d09fc43a42feadce506c37633ff531fe19bc2a402f3eaa4a1f5cdb22bc9858a73b7f711382df174cc6c42a16924d0baa251bcdb427b6e6

    • SSDEEP

      49152:Dl5MTGChZpxtlBBgxchXb/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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks