General

  • Target

    756cbd9f6a66ab84ffb1c78f2d054b61c91797d3e85919aac35d8fbf3ef560b1N.exe

  • Size

    4.9MB

  • Sample

    241204-x2ny3sxjdy

  • MD5

    1bb1f6509357d3d40ecab459efc44290

  • SHA1

    61f543cf1d45c98cc1e9042136537596ff94ed81

  • SHA256

    756cbd9f6a66ab84ffb1c78f2d054b61c91797d3e85919aac35d8fbf3ef560b1

  • SHA512

    0cddafaf5705ab544213bec159df6a70aa9e9bc6cef020f2cbb9a24bb40d21ea6220ecbfa49540ae114be0ef3845324c8687927dee594b818b150980fd0c9be7

  • 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

      756cbd9f6a66ab84ffb1c78f2d054b61c91797d3e85919aac35d8fbf3ef560b1N.exe

    • Size

      4.9MB

    • MD5

      1bb1f6509357d3d40ecab459efc44290

    • SHA1

      61f543cf1d45c98cc1e9042136537596ff94ed81

    • SHA256

      756cbd9f6a66ab84ffb1c78f2d054b61c91797d3e85919aac35d8fbf3ef560b1

    • SHA512

      0cddafaf5705ab544213bec159df6a70aa9e9bc6cef020f2cbb9a24bb40d21ea6220ecbfa49540ae114be0ef3845324c8687927dee594b818b150980fd0c9be7

    • 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