Resubmissions

09/07/2026, 02:26

260709-cw9clsbz6p

09/07/2026, 02:18

260709-crhzvscy2w9

General

  • Target
    umbra bootstrapper wow updated.exe
  • Size 3.4MB
  • Sample260709-crhzvscy2w
  • SHA256 2c3dd9e946d7b3456da1b09ee3b1d0ff5c42dd26b6b7d6a7d2e318e45015c6ca
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      umbra bootstrapper wow updated.exe
    • Size 3.4MB
    • SHA256 2c3dd9e946d7b3456da1b09ee3b1d0ff5c42dd26b6b7d6a7d2e318e45015c6ca
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Looks for VirtualBox Guest Additions in registry

    • Looks for VMWare Tools registry key

    • 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.

    • Executes dropped EXE

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Checks whether UAC is enabled

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Maps connected drives based on registry

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

    • Network Share Discovery

      Attempt to gather information on host network.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v16

Tasks