General

  • Target

    a8733ea13062f65d6aaeb65f8836f9c57bc3c3af7c0d04b94bd072ed2f56b1d1.exe

  • Size

    3.1MB

  • Sample

    240701-bmr7as1hma

  • MD5

    18f5a3194d73e08d7d66b7a3b42568b3

  • SHA1

    86d424c8a86ec2f20407f9f2db9133a0a2b314f7

  • SHA256

    a8733ea13062f65d6aaeb65f8836f9c57bc3c3af7c0d04b94bd072ed2f56b1d1

  • SHA512

    3f14d5b896cdba1ea41516a3c1f9b2745bd403a57bb66bf6c2016ee5dde2f2bab8560822975848f4920502a4ae94975891846d8249ab401054655482964bcb11

  • SSDEEP

    49152:UbA30w1VlUYYDF62IumHbysKqLb5yHfCbShsA3z42d7U8rUc1uHToN/:UbgJWF6ymHbRzLb5ya2hsUz4c7W9K/

Malware Config

Targets

    • Target

      a8733ea13062f65d6aaeb65f8836f9c57bc3c3af7c0d04b94bd072ed2f56b1d1.exe

    • Size

      3.1MB

    • MD5

      18f5a3194d73e08d7d66b7a3b42568b3

    • SHA1

      86d424c8a86ec2f20407f9f2db9133a0a2b314f7

    • SHA256

      a8733ea13062f65d6aaeb65f8836f9c57bc3c3af7c0d04b94bd072ed2f56b1d1

    • SHA512

      3f14d5b896cdba1ea41516a3c1f9b2745bd403a57bb66bf6c2016ee5dde2f2bab8560822975848f4920502a4ae94975891846d8249ab401054655482964bcb11

    • SSDEEP

      49152:UbA30w1VlUYYDF62IumHbysKqLb5yHfCbShsA3z42d7U8rUc1uHToN/:UbgJWF6ymHbRzLb5ya2hsUz4c7W9K/

    • 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.

    • Detects executables packed with SmartAssembly

    • 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

    • Loads dropped DLL

    • Checks whether UAC is enabled

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

Tasks