General

  • Target

    https://necrocracked.sell.app/product/ro-exec-krampus?store=necrocracked&quantity=1

  • Sample

    240424-1j76saab3s

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %Public%

  • install_file

    svchost.exe

  • pastebin_url

    https://pastebin.com/raw/UWpQULMP

Targets

    • Target

      https://necrocracked.sell.app/product/ro-exec-krampus?store=necrocracked&quantity=1

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Downloads MZ/PE file

    • Modifies Installed Components in the registry

    • Sets file execution options in registry

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Registers COM server for autorun

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Legitimate hosting services abused for malware hosting/C2

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Checks system information in the registry

      System information is often read in order to detect sandboxing environments.

    • Drops file in System32 directory

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

4
T1547.001

Browser Extensions

1
T1176

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

4
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

6
T1112

Discovery

Query Registry

5
T1012

System Information Discovery

5
T1082

Command and Control

Web Service

1
T1102

Tasks