General

  • Target

    e047c6f235d24f5b5c24f9e48944d950N.exe

  • Size

    4.9MB

  • Sample

    240906-kfxmwawhlg

  • MD5

    e047c6f235d24f5b5c24f9e48944d950

  • SHA1

    5383b522f57d1203905d0713a8996ed38c28cc73

  • SHA256

    5ee39fdf4c213cf6668c9b310d047a6501dfec9d256c9ff81c3f4c1321e5611a

  • SHA512

    f9b7c8721f23b2f6ca53659b75f0b45038bdab960bf676a70ea9cc5f7f0956be8678beaf6e7c90595a716511c53b8aecb20edded1f833b420968fa65f56e88e5

  • SSDEEP

    49152:Dl5MTGChZpxtlBBgxchXb/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

      e047c6f235d24f5b5c24f9e48944d950N.exe

    • Size

      4.9MB

    • MD5

      e047c6f235d24f5b5c24f9e48944d950

    • SHA1

      5383b522f57d1203905d0713a8996ed38c28cc73

    • SHA256

      5ee39fdf4c213cf6668c9b310d047a6501dfec9d256c9ff81c3f4c1321e5611a

    • SHA512

      f9b7c8721f23b2f6ca53659b75f0b45038bdab960bf676a70ea9cc5f7f0956be8678beaf6e7c90595a716511c53b8aecb20edded1f833b420968fa65f56e88e5

    • SSDEEP

      49152:Dl5MTGChZpxtlBBgxchXb/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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

2
T1112

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Tasks