General

  • Target

    287526315843ee93b7fa8dd61f37e9d9be0c6eda8115c17e1fb26af5a16a3924.exe

  • Size

    4.9MB

  • Sample

    241117-a162yaxdpf

  • MD5

    397875ccdde144b8118a6c31e9f2ddf5

  • SHA1

    2dd084fb6fcf3f88ec0e377e3d588e72db36a7e7

  • SHA256

    287526315843ee93b7fa8dd61f37e9d9be0c6eda8115c17e1fb26af5a16a3924

  • SHA512

    d596ef357651886280750397c6d46c2cd67c452dd66181ba6cee487c6b8f2780f6e9d7e313809860ff258507d3c05b6c0a13ecdb5527c8be54fb3e4ff84684d7

  • SSDEEP

    49152:bl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8I:Q

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

      287526315843ee93b7fa8dd61f37e9d9be0c6eda8115c17e1fb26af5a16a3924.exe

    • Size

      4.9MB

    • MD5

      397875ccdde144b8118a6c31e9f2ddf5

    • SHA1

      2dd084fb6fcf3f88ec0e377e3d588e72db36a7e7

    • SHA256

      287526315843ee93b7fa8dd61f37e9d9be0c6eda8115c17e1fb26af5a16a3924

    • SHA512

      d596ef357651886280750397c6d46c2cd67c452dd66181ba6cee487c6b8f2780f6e9d7e313809860ff258507d3c05b6c0a13ecdb5527c8be54fb3e4ff84684d7

    • SSDEEP

      49152:bl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8I:Q

    • 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