General

  • Target

    4a51d27aaaa0bb67872d99147bae13d0N

  • Size

    4.9MB

  • Sample

    240913-v24cnayfnq

  • MD5

    4a51d27aaaa0bb67872d99147bae13d0

  • SHA1

    a2b4c8f679911bc03a14e4f9be242ef9b0e4d97d

  • SHA256

    9636a592ea745fc8173b9ec8527f94fc8733ca1157837009ead6ed97293e2d5e

  • SHA512

    e208fb10b57ff8dcec352887ac8221bf348af5dbdae73ab1cd6885edbce26a2e81d96bf6f89bd5e482e30c2016fb73172eb714e3f77bebfe43bbd98bed381b6d

  • SSDEEP

    49152:bl5MTGChZpxtlBBgxchXb/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

      4a51d27aaaa0bb67872d99147bae13d0N

    • Size

      4.9MB

    • MD5

      4a51d27aaaa0bb67872d99147bae13d0

    • SHA1

      a2b4c8f679911bc03a14e4f9be242ef9b0e4d97d

    • SHA256

      9636a592ea745fc8173b9ec8527f94fc8733ca1157837009ead6ed97293e2d5e

    • SHA512

      e208fb10b57ff8dcec352887ac8221bf348af5dbdae73ab1cd6885edbce26a2e81d96bf6f89bd5e482e30c2016fb73172eb714e3f77bebfe43bbd98bed381b6d

    • SSDEEP

      49152:bl5MTGChZpxtlBBgxchXb/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 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