General

  • Target

    991ad52e8f01839d1b6553cde8cd95ac42fb4da694c36dfc53d700b45a189b6b

  • Size

    4.9MB

  • Sample

    241029-der8fa1mgk

  • MD5

    b5578d55623a79cf105d62dc41402e67

  • SHA1

    2914b5f5b47c4d4e7ab756aa8529a1648df22947

  • SHA256

    991ad52e8f01839d1b6553cde8cd95ac42fb4da694c36dfc53d700b45a189b6b

  • SHA512

    09160ba1ef2cfdac9a125cc4660ccc0b4a6b01f7b7334494cdda34fd9845e8b70fe4eae96d2d2a1a63d839c0593ba144176f8754311a5dd8237ce92e4040477e

  • SSDEEP

    49152:jl5MTGChZpxtlBBgxchXb/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

      991ad52e8f01839d1b6553cde8cd95ac42fb4da694c36dfc53d700b45a189b6b

    • Size

      4.9MB

    • MD5

      b5578d55623a79cf105d62dc41402e67

    • SHA1

      2914b5f5b47c4d4e7ab756aa8529a1648df22947

    • SHA256

      991ad52e8f01839d1b6553cde8cd95ac42fb4da694c36dfc53d700b45a189b6b

    • SHA512

      09160ba1ef2cfdac9a125cc4660ccc0b4a6b01f7b7334494cdda34fd9845e8b70fe4eae96d2d2a1a63d839c0593ba144176f8754311a5dd8237ce92e4040477e

    • SSDEEP

      49152:jl5MTGChZpxtlBBgxchXb/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