General

  • Target

    notepadd.exe

  • Size

    7.4MB

  • Sample

    240821-n4tgxa1apn

  • MD5

    c694c8301947af8b5c65e6132581044b

  • SHA1

    d1c7cbb77eff86db70df4feae1c2a849fb695b65

  • SHA256

    0e18f1cd01243a43de369982b88a586b585f2dc34f0c8a942f54f21069e5c71c

  • SHA512

    babe000cade9afcc76cf41b0bd064c0124d5a97ff4e3e52024e25ad39fe8f9f26ac3a4027f4194d19ead2a502df4dbc916f1b2f870a14d4a2ae28a3115804775

  • SSDEEP

    196608:1mcUG4raKu24YY7HVT4hV0AD6QgqKRgX:CmKr4YYH+EUWpgX

Malware Config

Extracted

Family

xworm

C2

88.0.183.177:1603

88.0.172.65:1603

83.36.190.196:1603

83.38.30.219:1603

Attributes
  • Install_directory

    %Public%

  • install_file

    WmiPrvSE.exe

Extracted

Family

xworm

Version

5.0

C2

88.0.183.177:1603

88.0.172.65:1603

83.36.190.196:1603

83.38.30.219:1603

Mutex

XpRJMNcN9dWrZEo0

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    RuntimeBroker.exe

aes.plain

Targets

    • Target

      notepadd.exe

    • Size

      7.4MB

    • MD5

      c694c8301947af8b5c65e6132581044b

    • SHA1

      d1c7cbb77eff86db70df4feae1c2a849fb695b65

    • SHA256

      0e18f1cd01243a43de369982b88a586b585f2dc34f0c8a942f54f21069e5c71c

    • SHA512

      babe000cade9afcc76cf41b0bd064c0124d5a97ff4e3e52024e25ad39fe8f9f26ac3a4027f4194d19ead2a502df4dbc916f1b2f870a14d4a2ae28a3115804775

    • SSDEEP

      196608:1mcUG4raKu24YY7HVT4hV0AD6QgqKRgX:CmKr4YYH+EUWpgX

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Command and Scripting Interpreter: PowerShell

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

    • 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

    • Loads dropped DLL

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks