General

  • Target

    b642e29066bc94c378a3de14ba7263ab2190aa4b7c140a667014e388b1fa1da8

  • Size

    345KB

  • Sample

    220927-vxw3safbap

  • MD5

    074f4690e37f519e136a17d673fb023c

  • SHA1

    6ae97f82fafb429df5c4af4e1f708fa72570cedb

  • SHA256

    b642e29066bc94c378a3de14ba7263ab2190aa4b7c140a667014e388b1fa1da8

  • SHA512

    b3f268cc367d21d5454c906c23a6830677631c0dc1deb6b1ee3d39fba9e9fec7f9b557f0714a75a0bfff1e72416db15bca7d6757f2089024d4ad55d47a3bc9b7

  • SSDEEP

    6144:J+WVyOeJwU4oJ9ZETtTMRxM+cJohwzyqtI+F6F2HAcByuwHtc:dIqUj9ZtDMhJojIdF6Flc0uwH

Malware Config

Targets

    • Target

      b642e29066bc94c378a3de14ba7263ab2190aa4b7c140a667014e388b1fa1da8

    • Size

      345KB

    • MD5

      074f4690e37f519e136a17d673fb023c

    • SHA1

      6ae97f82fafb429df5c4af4e1f708fa72570cedb

    • SHA256

      b642e29066bc94c378a3de14ba7263ab2190aa4b7c140a667014e388b1fa1da8

    • SHA512

      b3f268cc367d21d5454c906c23a6830677631c0dc1deb6b1ee3d39fba9e9fec7f9b557f0714a75a0bfff1e72416db15bca7d6757f2089024d4ad55d47a3bc9b7

    • SSDEEP

      6144:J+WVyOeJwU4oJ9ZETtTMRxM+cJohwzyqtI+F6F2HAcByuwHtc:dIqUj9ZtDMhJojIdF6Flc0uwH

    • Modifies security service

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

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

    • XMRig Miner payload

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Stops running service(s)

    • UPX packed file

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

    • Checks BIOS information in registry

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

    • Checks computer location settings

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

    • Identifies Wine through registry keys

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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Checks whether UAC is enabled

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Modify Existing Service

2
T1031

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

Virtualization/Sandbox Evasion

2
T1497

Impair Defenses

1
T1562

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Impact

Service Stop

1
T1489

Tasks