General

  • Target

    0a8b61ef492837674d8faf6fd87897dd12857db5645b49c83f0e5d067a6db003N.exe

  • Size

    4.9MB

  • Sample

    241203-am97fazpcx

  • MD5

    613c17af7e79ea0696b12a8d2a4b99e0

  • SHA1

    3c1fa83f993484fffb9def759879c320750d8ddc

  • SHA256

    0a8b61ef492837674d8faf6fd87897dd12857db5645b49c83f0e5d067a6db003

  • SHA512

    3ccc372ca5dc7ca97f6050ae8b42c3b0d839bda5c8237b256a443e9246fa0fc36d256d6ae5b001d298f5e9253a98f68edce0c652d2a9f85bc7af542c00c52f15

  • 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

      0a8b61ef492837674d8faf6fd87897dd12857db5645b49c83f0e5d067a6db003N.exe

    • Size

      4.9MB

    • MD5

      613c17af7e79ea0696b12a8d2a4b99e0

    • SHA1

      3c1fa83f993484fffb9def759879c320750d8ddc

    • SHA256

      0a8b61ef492837674d8faf6fd87897dd12857db5645b49c83f0e5d067a6db003

    • SHA512

      3ccc372ca5dc7ca97f6050ae8b42c3b0d839bda5c8237b256a443e9246fa0fc36d256d6ae5b001d298f5e9253a98f68edce0c652d2a9f85bc7af542c00c52f15

    • 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