Extracted

• • Target
    Nucker.exe
  • Size 17.1MB
  • SHA256 c90bc86ba777e01ab51d248f0d2b297a4129a78fff765fcc2847d802776a2ec1
  • MD5 b04909458a152c800139a83354600bc9
  • SHA1 3efeb529aa8dc49a4bbd7cddbd1447db72f2f88c
  • SHA512 f1db03d94e7af2f7b84721247da424e51f9544fe13fe57c4438f4727dbbcd14c13502d7d39cbea5e0ced0b96cb3186e93ffbfdb778dea14f1cb1f977f120d12b
  • SSDEEP 393216:0gcDQzLkCxrZo3o8P+KYJznoBy/aZNoW8CoG:N7v+3o4+vloB2arnjoG
  • TLSH
    T1090722B382CF1FBD83A97AA2A1B44D4D7A63DB44D678B10E1E7BB1A10DD2853570D2C4
  • MD5 SHA1 SHA512 SSDEEP TLSH

  Score

  10^/10

  bootkitdefense_evasionexecutionxwormpersistencepyinstallerrattrojan

  • Detect Xworm Payload

  • Family: Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm

  • Command and Scripting Interpreter: PowerShell

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    execution

  • Sets service image path in registry

    This determines the executable launched when a service starts. It can be used to establish persistence.

    persistence

  • 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

  • Indicator Removal: Clear Windows Event Logs

    Clear Windows Event Logs to hide the activity of an intrusion.

    defense_evasion

  • Loads dropped DLL

  • Enumerates connected drives

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

  • Writes to the Master Boot Record (MBR)

    Bootkits write to the MBR to gain persistence at a level below the operating system.

    bootkitpersistence

  • ConfuserEx .NET packer

    Detects ConfuserEx .NET packer.

  • Drops file in System32 directory

  behavioral1behavioral2behavioral3