General

  • Target

    e249c23fdd59a6f4cdbcd4cc7ded4300N

  • Size

    4.9MB

  • Sample

    240908-hma2cavaja

  • MD5

    e249c23fdd59a6f4cdbcd4cc7ded4300

  • SHA1

    649b368b943bb8b93d90b21cd7ae9e59cd07c12e

  • SHA256

    85661d2d721f961564cb6de32c3f08b8108302e2d709f51aa8c03d6bbf114cc0

  • SHA512

    9c4d705dbca7224baa7a2e7f5918c7c14250ad78f216ebb96652845ac7c3fa6f21cee119276b5dbf77b4ac05ba78fc47386601985bf9c85096b9c83e9fb1855f

  • SSDEEP

    49152:Ll5MTGChZpxtlBBgxchXb/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

      e249c23fdd59a6f4cdbcd4cc7ded4300N

    • Size

      4.9MB

    • MD5

      e249c23fdd59a6f4cdbcd4cc7ded4300

    • SHA1

      649b368b943bb8b93d90b21cd7ae9e59cd07c12e

    • SHA256

      85661d2d721f961564cb6de32c3f08b8108302e2d709f51aa8c03d6bbf114cc0

    • SHA512

      9c4d705dbca7224baa7a2e7f5918c7c14250ad78f216ebb96652845ac7c3fa6f21cee119276b5dbf77b4ac05ba78fc47386601985bf9c85096b9c83e9fb1855f

    • SSDEEP

      49152:Ll5MTGChZpxtlBBgxchXb/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