General

  • Target

    b8a5a65f1c36e6e16080dfa07bbcb2296023b1092006dcdf5ea49c9b46be166eN

  • Size

    4.9MB

  • Sample

    240922-pzw8nszfqn

  • MD5

    c31fedba9ce9222a356e7715a3c34920

  • SHA1

    0461a57e40a68464e8bd0c1a8450013da3b343d7

  • SHA256

    b8a5a65f1c36e6e16080dfa07bbcb2296023b1092006dcdf5ea49c9b46be166e

  • SHA512

    86a6e7190b99a8f204871f28b6614e7c44d9fb6bbf9118afdcc1d81094aa2de72b5ca0e415bf408b84fcfc3fd715482139f69f11e64189f60c1bc647bffc0632

  • 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

      b8a5a65f1c36e6e16080dfa07bbcb2296023b1092006dcdf5ea49c9b46be166eN

    • Size

      4.9MB

    • MD5

      c31fedba9ce9222a356e7715a3c34920

    • SHA1

      0461a57e40a68464e8bd0c1a8450013da3b343d7

    • SHA256

      b8a5a65f1c36e6e16080dfa07bbcb2296023b1092006dcdf5ea49c9b46be166e

    • SHA512

      86a6e7190b99a8f204871f28b6614e7c44d9fb6bbf9118afdcc1d81094aa2de72b5ca0e415bf408b84fcfc3fd715482139f69f11e64189f60c1bc647bffc0632

    • SSDEEP

      49152:jl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8E:

    • Colibri Loader

      A loader sold as MaaS first seen in August 2021.

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • 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