General

  • Target

    MrsMajor 3.0.7z

  • Size

    234KB

  • Sample

    240308-nexg9see9y

  • MD5

    fedb45ddbd72fc70a81c789763038d81

  • SHA1

    f1ed20c626d0a7ca2808ed768e7d7b319bc4c84a

  • SHA256

    eacd5ed86a8ddd368a1089c7b97b791258e3eeb89c76c6da829b58d469f654b2

  • SHA512

    813c0367f3aeceea9be02ffad4bfa8092ea44b428e68db8f3f33e45e4e5e53599d985fa79a708679b6957cbd04d9b9d67b288137fa71ac5a59e917b8792c8298

  • SSDEEP

    6144:HMMAgnxjSgdHCueEVIzAMAcqXvYEC86TFSQ:HagxjSg1xrIzAMAcuI5TFT

Malware Config

Targets

    • Target

      MrsMajor 3.0.7z

    • Size

      234KB

    • MD5

      fedb45ddbd72fc70a81c789763038d81

    • SHA1

      f1ed20c626d0a7ca2808ed768e7d7b319bc4c84a

    • SHA256

      eacd5ed86a8ddd368a1089c7b97b791258e3eeb89c76c6da829b58d469f654b2

    • SHA512

      813c0367f3aeceea9be02ffad4bfa8092ea44b428e68db8f3f33e45e4e5e53599d985fa79a708679b6957cbd04d9b9d67b288137fa71ac5a59e917b8792c8298

    • SSDEEP

      6144:HMMAgnxjSgdHCueEVIzAMAcqXvYEC86TFSQ:HagxjSg1xrIzAMAcuI5TFT

    • UAC bypass

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v13

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

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

3
T1112

Discovery

Query Registry

4
T1012

System Information Discovery

4
T1082

Command and Control

Web Service

1
T1102

Tasks