Analysis

  • max time kernel
    570s
  • max time network
    567s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    21-01-2025 17:22

General

  • Target

    sigmacit.exe

  • Size

    84KB

  • MD5

    fd1a1484cb672a56397919536a9a6245

  • SHA1

    be050296237d796240bc177003e9bb439fbab362

  • SHA256

    893066e51bb3d4724a4afd40c8a78de9dff745c71390206ab3f8115c70138d4d

  • SHA512

    26095e0e8d59ebb18d4cbeaaa5f6e08a1c90527849062409cac01e29b9e6db97aa6aae11348d066c950b848ec9248ea1df73dda704d590d6dc3c629329a9c262

  • SSDEEP

    1536:dZV6b74SjZgbZKHOKSKl3xttjoRpb5D1kGGAKmO6iQovetHN7/uMZyIO9mbW:dvijluRKl3xttjoRpbx1kGGA1piL8Nz6

Malware Config

Extracted

Family

xworm

Attributes
  • install_file

    USB.exe

  • pastebin_url

    https://pastebin.com/raw/Lq5dsDAQ

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 64 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Event Triggered Execution: Accessibility Features 1 TTPs

    Windows contains accessibility features that may be used by adversaries to establish persistence and/or elevate privileges.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\sigmacit.exe
    "C:\Users\Admin\AppData\Local\Temp\sigmacit.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2380
  • C:\Windows\system32\magnify.exe
    "C:\Windows\system32\magnify.exe"
    1⤵
      PID:2816
    • C:\Windows\system32\utilman.exe
      utilman.exe /debug
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:2696
      • C:\Windows\System32\Magnify.exe
        "C:\Windows\System32\Magnify.exe"
        2⤵
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        PID:2852

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/2380-0-0x000007FEF58F3000-0x000007FEF58F4000-memory.dmp

      Filesize

      4KB

    • memory/2380-1-0x0000000000930000-0x000000000094C000-memory.dmp

      Filesize

      112KB

    • memory/2380-2-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

      Filesize

      9.9MB

    • memory/2380-3-0x000007FEF58F3000-0x000007FEF58F4000-memory.dmp

      Filesize

      4KB

    • memory/2380-4-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

      Filesize

      9.9MB