General

  • Target
    servicebound.exe
  • Size 3.2MB
  • Sample260731-wege2sdk6z
  • SHA256 94bc5733800b54d7ee5f22b874ed84cfccf041b90ba55b59aa731193fa9c638a
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • neptunerat

C2
  • eell-50912.portmap.host:50912

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    h7OygJtxUtRsiA1u

  • rat_name

    MasonRAT

Extracted

Family
  • xworm

Mutex
  • yNحكـX8ٍبAGLWِF6Jo2DiObلٍLZا3ا

Attributes
  • Install_directory

    %Port%

  • install_file

    MicrosoftEdgeUpdateTaskMachineUAC.exe

aes.plain

Targets

    • Target
      servicebound.exe
    • Size 3.2MB
    • SHA256 94bc5733800b54d7ee5f22b874ed84cfccf041b90ba55b59aa731193fa9c638a
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detect Xworm Payload

    • Detects NeptuneRAT stealer

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

    • Sets service image path in registry

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

    • Creates new service(s)

    • Executes dropped EXE

    • Indicator Removal: Clear Windows Event Logs

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

    • Stops running service(s)

    • Contacts third-party web service commonly abused for C2

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

    • 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.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v16

Tasks