General

  • Target

    3fec697a041f563d5726433d0dde6b5aeb110902f6b828722f4d4121a6dee9bdN.exe

  • Size

    4.9MB

  • Sample

    241216-t24sravpct

  • MD5

    2c3bf56a91d29eceee2078a85b738cc0

  • SHA1

    78ea0f96e4f560bb3cdb9cdcd157adb773c3d7fa

  • SHA256

    3fec697a041f563d5726433d0dde6b5aeb110902f6b828722f4d4121a6dee9bd

  • SHA512

    9507ce6faec5c17d1078db95220e8dce8a5d055fc5cb574c09a8a54d8b08b6475db1641a9f8fb13170c2a02ca2b10f6d31b4f902603efff7eeb6df962d0efb21

  • 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

      3fec697a041f563d5726433d0dde6b5aeb110902f6b828722f4d4121a6dee9bdN.exe

    • Size

      4.9MB

    • MD5

      2c3bf56a91d29eceee2078a85b738cc0

    • SHA1

      78ea0f96e4f560bb3cdb9cdcd157adb773c3d7fa

    • SHA256

      3fec697a041f563d5726433d0dde6b5aeb110902f6b828722f4d4121a6dee9bd

    • SHA512

      9507ce6faec5c17d1078db95220e8dce8a5d055fc5cb574c09a8a54d8b08b6475db1641a9f8fb13170c2a02ca2b10f6d31b4f902603efff7eeb6df962d0efb21

    • 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