General

  • Target

    68746e93d479b484dd35ee6afa14496e38fadce3067fd86a59ad5a78c20e35f2

  • Size

    4.9MB

  • Sample

    240910-2gw66sydpm

  • MD5

    a7d660695a3c55b0c2b6b81f608b65fe

  • SHA1

    451d92a971b532de8ae8d116f5b6c10c1eb2c0ab

  • SHA256

    68746e93d479b484dd35ee6afa14496e38fadce3067fd86a59ad5a78c20e35f2

  • SHA512

    61cf2c0e0fe4736140ea2219351befbbd867c8d6746ec62bc3b04c962504abb26c509ba5436cfc0723c9f0240794c93c6670739d464f80e6dda6929b45a51dc6

  • 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

      68746e93d479b484dd35ee6afa14496e38fadce3067fd86a59ad5a78c20e35f2

    • Size

      4.9MB

    • MD5

      a7d660695a3c55b0c2b6b81f608b65fe

    • SHA1

      451d92a971b532de8ae8d116f5b6c10c1eb2c0ab

    • SHA256

      68746e93d479b484dd35ee6afa14496e38fadce3067fd86a59ad5a78c20e35f2

    • SHA512

      61cf2c0e0fe4736140ea2219351befbbd867c8d6746ec62bc3b04c962504abb26c509ba5436cfc0723c9f0240794c93c6670739d464f80e6dda6929b45a51dc6

    • 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

    • 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