General

  • Target

    4f664b5b198baf3e5caa4b2781c60361e838df5c724642fa47ad282f2c40e763

  • Size

    15.3MB

  • Sample

    240529-gzgtzsdg93

  • MD5

    e89d5079fc8227249244e2a0833069cd

  • SHA1

    97562fea156f555384b0b2054a993981b21417ed

  • SHA256

    4f664b5b198baf3e5caa4b2781c60361e838df5c724642fa47ad282f2c40e763

  • SHA512

    41e0f10c3456217eca39289835c9e60de1e5b88a3016464e2f662ebaedf585c9418cd47497de14f52c5d415a85dda9236922b967dd95e15ff53eee61c03354b3

  • SSDEEP

    393216:77RVLPeB5W+nGRmSsZW/BjSXyrc+pzMOKp5a398C5F:X/eB5W+aL/BjbzzMOgA8C

Malware Config

Targets

    • Target

      4f664b5b198baf3e5caa4b2781c60361e838df5c724642fa47ad282f2c40e763

    • Size

      15.3MB

    • MD5

      e89d5079fc8227249244e2a0833069cd

    • SHA1

      97562fea156f555384b0b2054a993981b21417ed

    • SHA256

      4f664b5b198baf3e5caa4b2781c60361e838df5c724642fa47ad282f2c40e763

    • SHA512

      41e0f10c3456217eca39289835c9e60de1e5b88a3016464e2f662ebaedf585c9418cd47497de14f52c5d415a85dda9236922b967dd95e15ff53eee61c03354b3

    • SSDEEP

      393216:77RVLPeB5W+nGRmSsZW/BjSXyrc+pzMOKp5a398C5F:X/eB5W+aL/BjbzzMOgA8C

    • Detect PurpleFox Rootkit

      Detect PurpleFox Rootkit.

    • Gh0st RAT payload

    • Gh0strat

      Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.

    • PurpleFox

      PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Drops file in Drivers directory

    • Sets DLL path for service in the registry

    • Sets service image path in registry

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Executes dropped EXE

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    • Loads dropped DLL

    • UPX packed file

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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

2
T1112

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

1
T1082

Remote System Discovery

1
T1018

Tasks