General

  • Target

    03c95970bb3d91530aa29f9199ac1b2d7082672909e9c1a30804f99ebc9643b7.exe

  • Size

    558KB

  • Sample

    241016-bf7cmsvcrd

  • MD5

    dc50baff9f1bab10f1ebc24e0d77afc3

  • SHA1

    29f4429939e57666b8a57c2d7b95a4801fa7ca20

  • SHA256

    03c95970bb3d91530aa29f9199ac1b2d7082672909e9c1a30804f99ebc9643b7

  • SHA512

    6249ae2e738515d2f453310ad8e9730334997796477f88f0e1a72086154b0348b07da7c651b835f8e8b84ac43452fd0d87b5c40400d8a9a6297e802ae045a152

  • SSDEEP

    6144:mujuIGjAOphSW579i8fB106f91hYC1l+W8GSAZ2nxKdn3wGK570:LRaAODHVrB/lDH8gZhdAY

Malware Config

Extracted

Family

xworm

Mutex

سPيIXNtJمrCWpكxـاطMWEلD21LcبإA

Attributes
  • Install_directory

    %Port%

  • install_file

    USB.exe

aes.plain

Targets

    • Target

      03c95970bb3d91530aa29f9199ac1b2d7082672909e9c1a30804f99ebc9643b7.exe

    • Size

      558KB

    • MD5

      dc50baff9f1bab10f1ebc24e0d77afc3

    • SHA1

      29f4429939e57666b8a57c2d7b95a4801fa7ca20

    • SHA256

      03c95970bb3d91530aa29f9199ac1b2d7082672909e9c1a30804f99ebc9643b7

    • SHA512

      6249ae2e738515d2f453310ad8e9730334997796477f88f0e1a72086154b0348b07da7c651b835f8e8b84ac43452fd0d87b5c40400d8a9a6297e802ae045a152

    • SSDEEP

      6144:mujuIGjAOphSW579i8fB106f91hYC1l+W8GSAZ2nxKdn3wGK570:LRaAODHVrB/lDH8gZhdAY

    • Detect Xworm Payload

    • Modifies security service

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Sets service image path in registry

    • 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.

    • 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.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks