General

  • Target

    f4535e8f37688004a0e9b6f775da0641d361cb558b391027b94e63237e5f5d23N

  • Size

    4.9MB

  • Sample

    241029-m8nxjsvdma

  • MD5

    d23ffc0a1e7c61633ee5553fe28c8af0

  • SHA1

    a9e6e784905bfc569f1ea5fe2f8fb15f8adad833

  • SHA256

    f4535e8f37688004a0e9b6f775da0641d361cb558b391027b94e63237e5f5d23

  • SHA512

    47725fb3cb5dc467e2a215582565be359e1bba1b9a07278d16544fef4388c91ea958ae3139bea74e41041148dd45d528f89d94f4a5c57b9ee69169ac07324b0b

  • 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

      f4535e8f37688004a0e9b6f775da0641d361cb558b391027b94e63237e5f5d23N

    • Size

      4.9MB

    • MD5

      d23ffc0a1e7c61633ee5553fe28c8af0

    • SHA1

      a9e6e784905bfc569f1ea5fe2f8fb15f8adad833

    • SHA256

      f4535e8f37688004a0e9b6f775da0641d361cb558b391027b94e63237e5f5d23

    • SHA512

      47725fb3cb5dc467e2a215582565be359e1bba1b9a07278d16544fef4388c91ea958ae3139bea74e41041148dd45d528f89d94f4a5c57b9ee69169ac07324b0b

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks