General

  • Target

    e.exe

  • Size

    501KB

  • Sample

    250302-b346sszny4

  • MD5

    851315103d9c8a23701e5866aa809bf7

  • SHA1

    728584af10cceecd2975f6bf7911d74aa69112fc

  • SHA256

    07fcf2d9af558e53ccd2f47c1c008782c14fa00f75ebde1ccdfe8c1b9f45adf8

  • SHA512

    a20ec7d22cbd4135371d88cf92f7f767513406f2b25fe468003930380d6a07be2c8bc3c63c667c2b636edf18be104cc75a33290f2dbdc045c59a21ae51f5402d

  • SSDEEP

    12288:01Vi3DTkV1ilKya0FOUuQ0gH+kmtbF6W05EJXp107sd:7kGTy

Malware Config

Extracted

Family

xworm

Version

5.0

C2

communication-xl.gl.at.ply.gg:36476

Mutex

rFF9OgJ4l9HAkScN

Attributes
  • Install_directory

    %Public%

  • install_file

    XClient.exe

aes.plain

Targets

    • Target

      e.exe

    • Size

      501KB

    • MD5

      851315103d9c8a23701e5866aa809bf7

    • SHA1

      728584af10cceecd2975f6bf7911d74aa69112fc

    • SHA256

      07fcf2d9af558e53ccd2f47c1c008782c14fa00f75ebde1ccdfe8c1b9f45adf8

    • SHA512

      a20ec7d22cbd4135371d88cf92f7f767513406f2b25fe468003930380d6a07be2c8bc3c63c667c2b636edf18be104cc75a33290f2dbdc045c59a21ae51f5402d

    • SSDEEP

      12288:01Vi3DTkV1ilKya0FOUuQ0gH+kmtbF6W05EJXp107sd:7kGTy

    • Detect Xworm Payload

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • 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.

    • Drops startup file

    • Executes dropped EXE

    • Indicator Removal: Clear Windows Event Logs

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

    • Adds Run key to start application

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks