General

  • Target

    9aaa74c410a6e97b930a65c1f088598ceab8054b9bc1928b31a4a57a1e98f764.exe

  • Size

    4.9MB

  • Sample

    241219-badhdazrcr

  • MD5

    4da9ed14404a53268904e7dd6959f52b

  • SHA1

    c3d798fd07decc8136c52523428d02610fad42c4

  • SHA256

    9aaa74c410a6e97b930a65c1f088598ceab8054b9bc1928b31a4a57a1e98f764

  • SHA512

    cba29b2cce4fa6211409fea7103d12f7ab4408e9c1916c77c2de44106a52a1d34eab1c73331768e5e8d49127b8bdd54d08a8ab4889a11fc80b03db11ce7fa284

  • SSDEEP

    49152:rl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx87:j

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

      9aaa74c410a6e97b930a65c1f088598ceab8054b9bc1928b31a4a57a1e98f764.exe

    • Size

      4.9MB

    • MD5

      4da9ed14404a53268904e7dd6959f52b

    • SHA1

      c3d798fd07decc8136c52523428d02610fad42c4

    • SHA256

      9aaa74c410a6e97b930a65c1f088598ceab8054b9bc1928b31a4a57a1e98f764

    • SHA512

      cba29b2cce4fa6211409fea7103d12f7ab4408e9c1916c77c2de44106a52a1d34eab1c73331768e5e8d49127b8bdd54d08a8ab4889a11fc80b03db11ce7fa284

    • SSDEEP

      49152:rl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx87:j

    • 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