Analysis

  • max time kernel
    137s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    26-05-2024 01:59

General

  • Target

    XClient.exe

  • Size

    175KB

  • MD5

    9afc2e70fad3d440999ed605851850e4

  • SHA1

    34836262686a5b0b726a39c668fe1d7dd6008c0d

  • SHA256

    90c35873f1c8dc86fcf087b25a5030bd530ae6cbe72e2b5a8a1e78aa1fca6599

  • SHA512

    a9d106af7956fc0edea1c41bf1da6d91660a84ed20a70cc249fea392f15d86ba994f5648a463cb5cebd4df8e20adcd7f1e3ce23522b1fd140aa95b90b3688c53

  • SSDEEP

    3072:yClC9kymzLTWb/3mGOzZnvzBz65/M6If+3Js+3JFkKeTno:yClCuRqb2rxBt25

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:7000

192.168.1.3:7000

fe80::717e:3988:f9ae:459f%20:7000

Attributes
  • install_file

    USB.exe

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

  • 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).

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1924
    • 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\XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2756
    • 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:2584

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

    c13e7fd54030db1c7b44cb1b93269287

    SHA1

    4366ac80473f09821384f74da407701c1dead518

    SHA256

    38774ac9f7db8cfcdc6b41fd422fe1b3c04269a5daef61fd644e3f5d56342a88

    SHA512

    de48ce730c8d310bbe9d25c01ae19ea26f98565f57d42ddbd800dc2502a952044088f173ce964bf818adb9ae89e6a346275e9b97fe7990ea6cfe6526626708ff

  • memory/1924-0-0x000007FEF54F3000-0x000007FEF54F4000-memory.dmp

    Filesize

    4KB

  • memory/1924-1-0x0000000000950000-0x0000000000982000-memory.dmp

    Filesize

    200KB

  • memory/1924-2-0x000007FEF54F0000-0x000007FEF5EDC000-memory.dmp

    Filesize

    9.9MB

  • memory/1924-17-0x000007FEF54F3000-0x000007FEF54F4000-memory.dmp

    Filesize

    4KB

  • memory/1924-18-0x000007FEF54F0000-0x000007FEF5EDC000-memory.dmp

    Filesize

    9.9MB

  • memory/2584-15-0x000000001B680000-0x000000001B962000-memory.dmp

    Filesize

    2.9MB

  • memory/2584-16-0x00000000028E0000-0x00000000028E8000-memory.dmp

    Filesize

    32KB

  • memory/2756-7-0x00000000027D0000-0x0000000002850000-memory.dmp

    Filesize

    512KB

  • memory/2756-8-0x000000001B6A0000-0x000000001B982000-memory.dmp

    Filesize

    2.9MB

  • memory/2756-9-0x0000000001E80000-0x0000000001E88000-memory.dmp

    Filesize

    32KB