Analysis

  • max time kernel
    118s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    31-05-2024 12:39

General

  • Target

    rew.exe

  • Size

    137KB

  • MD5

    6fb74b7167db1e3749bf7d0141cdb6bb

  • SHA1

    3fba464b23491949ad74d3d549d917284deacadb

  • SHA256

    20f4a10545e41b42ac85fff035062ab142a5007e473626ed85c45b2e54402a63

  • SHA512

    b291fa76b37a213f6ef9f15ea7c978d2155005c8cffc3e458633256a34dd1d105bc72e6a580d440e338c8198bcfd5fc9d36d989ba52e22faf8b6da4b046f6f01

  • SSDEEP

    3072:fTMF4B4as+b9GCF+O4NGJUrXni52F47927ogw5az:umRbYgUrXni2rw

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:4328

20.ip.gl.ply.gg:4328

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\rew.exe
    "C:\Users\Admin\AppData\Local\Temp\rew.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:1176
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\rew.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1352
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'rew.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2604
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2612
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2004

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

    Filesize

    7KB

    MD5

    4802604145abe0b423db5597576793e4

    SHA1

    e5ad537bc0a27aa56d39163ce7bba27c53d13dab

    SHA256

    c2c74c3d60d4cb3660eb142129b6a67ff028d4d43d5ee37ddd68d86d49d6f165

    SHA512

    8dcadb2b64ced44a6b0efd6391257221303c0df7b8860c42184c4ff8a656a9fc140a091525d37161c48b40ffbc8a6cde81bae05243e4cf6d6be4985c93f3bab9

  • \??\PIPE\srvsvc

    MD5

    d41d8cd98f00b204e9800998ecf8427e

    SHA1

    da39a3ee5e6b4b0d3255bfef95601890afd80709

    SHA256

    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

    SHA512

    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

  • memory/1176-0-0x000007FEF5BA3000-0x000007FEF5BA4000-memory.dmp

    Filesize

    4KB

  • memory/1176-1-0x0000000000280000-0x00000000002A8000-memory.dmp

    Filesize

    160KB

  • memory/1176-31-0x0000000000520000-0x00000000005A0000-memory.dmp

    Filesize

    512KB

  • memory/1176-32-0x000007FEF5BA3000-0x000007FEF5BA4000-memory.dmp

    Filesize

    4KB

  • memory/1176-33-0x0000000000520000-0x00000000005A0000-memory.dmp

    Filesize

    512KB

  • memory/1352-6-0x0000000002730000-0x00000000027B0000-memory.dmp

    Filesize

    512KB

  • memory/1352-7-0x000000001B220000-0x000000001B502000-memory.dmp

    Filesize

    2.9MB

  • memory/1352-8-0x00000000022E0000-0x00000000022E8000-memory.dmp

    Filesize

    32KB

  • memory/2604-14-0x000000001B1F0000-0x000000001B4D2000-memory.dmp

    Filesize

    2.9MB

  • memory/2604-15-0x0000000002290000-0x0000000002298000-memory.dmp

    Filesize

    32KB