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General

  • Target

    free+fn.exe

  • Size

    1.7MB

  • Sample

    240801-zjensszgpe

  • MD5

    21d0503591599d833536e4d1bb7cb352

  • SHA1

    9664ffc0a92896b89911c35d73cab84605ab3b8b

  • SHA256

    cc9a7ddcb53c96c1b2acb8a77f0259319cc51f3405e8b00036bddc612ee56db6

  • SHA512

    2ea754b0eca571ce0536651b8d7127d35a8079006773af892b5ceb985be67710bc8297d426779cc7b4c26c4e35ae0eb8542e16da97a2b9f3178bbb291bef8848

  • SSDEEP

    24576:BI5g2vzFqkz5PTCtzRGhLArFVlebI+Jnmb2+ocKrREOKSS2u2Kr:e/NLOXfond+ocwEfXD

Score
9/10

Malware Config

Targets

    • Target

      free+fn.exe

    • Size

      1.7MB

    • MD5

      21d0503591599d833536e4d1bb7cb352

    • SHA1

      9664ffc0a92896b89911c35d73cab84605ab3b8b

    • SHA256

      cc9a7ddcb53c96c1b2acb8a77f0259319cc51f3405e8b00036bddc612ee56db6

    • SHA512

      2ea754b0eca571ce0536651b8d7127d35a8079006773af892b5ceb985be67710bc8297d426779cc7b4c26c4e35ae0eb8542e16da97a2b9f3178bbb291bef8848

    • SSDEEP

      24576:BI5g2vzFqkz5PTCtzRGhLArFVlebI+Jnmb2+ocKrREOKSS2u2Kr:e/NLOXfond+ocwEfXD

    Score
    9/10
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Looks for VirtualBox Guest Additions in registry

    • Blocklisted process makes network request

    • 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

    • Modifies file permissions

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks