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Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    06/04/2024, 21:57

General

  • Target

    XClient.exe

  • Size

    72KB

  • MD5

    3e8084d25cfbceadd9b370183206f118

  • SHA1

    c4e6c55e01a1a6c2ac2fbc5e9e77b991bcc8f0f9

  • SHA256

    75e411e87e9d1a1bd396d0860be81d268058b4e258e39fdb7dc768ba212b71f4

  • SHA512

    8b169936d92bae713288b29f9eb4be4e71133e916976410f722d457bf85ee82c7e149c69eb28cb2faf435702962d9c47f10d1085d83ae551d3eb687528ac785f

  • SSDEEP

    1536:k73W+adUwi/TzJK1+gE0Lp/uGA7vv0OZmpxubcUj0Rur0TAjvvWO4xkdgR/:kTWAtJq+gE05Arv0OXbcquO2v/

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:4782

Enslotheya-26934.portmap.io:4782

Enslotheya-26934.portmap.io:4782:4782

That1funnykid-39791.portmap.io:4782

That1funnykid-39791.portmap.io:4782:4782

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

Signatures

  • Detect Xworm Payload 3 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 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.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2216
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
      2⤵
      • Creates scheduled task(s)
      PID:2672
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {DD093C71-99A3-4EC7-9344-45F74E8D1FC7} S-1-5-21-3627615824-4061627003-3019543961-1000:SCFGBRBT\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1436
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2488
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1756

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\XClient.exe

    Filesize

    72KB

    MD5

    3e8084d25cfbceadd9b370183206f118

    SHA1

    c4e6c55e01a1a6c2ac2fbc5e9e77b991bcc8f0f9

    SHA256

    75e411e87e9d1a1bd396d0860be81d268058b4e258e39fdb7dc768ba212b71f4

    SHA512

    8b169936d92bae713288b29f9eb4be4e71133e916976410f722d457bf85ee82c7e149c69eb28cb2faf435702962d9c47f10d1085d83ae551d3eb687528ac785f

  • memory/1756-17-0x000007FEF5530000-0x000007FEF5F1C000-memory.dmp

    Filesize

    9.9MB

  • memory/1756-18-0x000007FEF5530000-0x000007FEF5F1C000-memory.dmp

    Filesize

    9.9MB

  • memory/2216-0-0x0000000000C50000-0x0000000000C68000-memory.dmp

    Filesize

    96KB

  • memory/2216-1-0x000007FEF5530000-0x000007FEF5F1C000-memory.dmp

    Filesize

    9.9MB

  • memory/2216-2-0x000000001AF40000-0x000000001AFC0000-memory.dmp

    Filesize

    512KB

  • memory/2216-7-0x000007FEF5530000-0x000007FEF5F1C000-memory.dmp

    Filesize

    9.9MB

  • memory/2216-8-0x000000001AF40000-0x000000001AFC0000-memory.dmp

    Filesize

    512KB

  • memory/2488-12-0x0000000000FB0000-0x0000000000FC8000-memory.dmp

    Filesize

    96KB

  • memory/2488-13-0x000007FEF5530000-0x000007FEF5F1C000-memory.dmp

    Filesize

    9.9MB

  • memory/2488-14-0x000007FEF5530000-0x000007FEF5F1C000-memory.dmp

    Filesize

    9.9MB