Resubmissions

04-08-2022 15:00

220804-sdphgshbfr 9

04-08-2022 14:57

220804-sbqmrshbdl 9

General

  • Target

    Sapphire_Loader.exe

  • Size

    3.5MB

  • Sample

    220804-sdphgshbfr

  • MD5

    87cbbc8f1688054e0abef4e00ba76ccf

  • SHA1

    99e7178d149f8046deb78c848ed99af50360616e

  • SHA256

    91bec27b79b2889bfe9eedc744b74b9438c638299f43c14a39f080fbb90f8eee

  • SHA512

    c840cb5aec658a000397b237876dd102e46aa5e44aa15d03d7618718ea637f9f903f4c9aff49e8bcfecaef2dfcce6a4c0dc201ed46ec2a4b7f701bfc995e2006

Malware Config

Targets

    • Target

      Sapphire_Loader.exe

    • Size

      3.5MB

    • MD5

      87cbbc8f1688054e0abef4e00ba76ccf

    • SHA1

      99e7178d149f8046deb78c848ed99af50360616e

    • SHA256

      91bec27b79b2889bfe9eedc744b74b9438c638299f43c14a39f080fbb90f8eee

    • SHA512

      c840cb5aec658a000397b237876dd102e46aa5e44aa15d03d7618718ea637f9f903f4c9aff49e8bcfecaef2dfcce6a4c0dc201ed46ec2a4b7f701bfc995e2006

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

    • Executes dropped EXE

    • Stops running service(s)

    • 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.

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Modify Existing Service

1
T1031

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Impair Defenses

1
T1562

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Remote System Discovery

1
T1018

Impact

Service Stop

1
T1489

Tasks