Analysis

  • max time kernel
    148s
  • max time network
    132s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    26-05-2024 12:21

General

  • Target

    XClient.exe

  • Size

    39KB

  • MD5

    66f5cca568b2b83c23a69295ad2c643b

  • SHA1

    b822f0bcded0f587413d84f27eb2f5fdcdb48304

  • SHA256

    971294811a8fd3c967958db073238a75573ea1db5749b8153e5f684b27f99da6

  • SHA512

    c8bf4acc4644b614715eeaf4cda10ba100afeceaab0f7b7cb627f1c6f7676308c0c73e7dbbe6833ec3da1f9c10616e2c28a9ba4fc88e180ff3e0123071c50469

  • SSDEEP

    768:VG7+qmT8ztyh6pwDYvCL2v6hCuuJf27iJ1fFWPG9/hL6OOwhnjibH:4fmT8ztyh6pwDnKwCuuJfBFv9/hL6OO3

Malware Config

Extracted

Family

xworm

Version

5.0

C2

127.0.0.1:54921

Mutex

Zv7fhTadtKHCA29x

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

aes.plain

Signatures

  • Detect Xworm Payload 5 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
  • Executes dropped EXE 3 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).

  • 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 24 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:2852
    • 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:2284
    • 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:2820
    • 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:2400
    • 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:2388
    • 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:2268
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {D122CE25-E8EE-4924-B75E-E5B3667417C0} S-1-5-21-1298544033-3225604241-2703760938-1000:IZKCKOTP\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1456
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1488
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:668
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2892

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

    b01181a1c8559c8c865751e6001c2a5e

    SHA1

    fbb6cc2b672982f4dfb4878e69c481807975cc28

    SHA256

    4d6983e3cadadd40e0a6b8c5bb812c574b560c8418107f14acf36ecb9df95c85

    SHA512

    1d2c230fc53464f00c5e0dff16e7ae651bbccf04092bfd03018bad803a651b69590b59fe38d1fd047ce665797fce5b01ff53d0aec404994e8238a1ee7149df77

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

    Filesize

    39KB

    MD5

    66f5cca568b2b83c23a69295ad2c643b

    SHA1

    b822f0bcded0f587413d84f27eb2f5fdcdb48304

    SHA256

    971294811a8fd3c967958db073238a75573ea1db5749b8153e5f684b27f99da6

    SHA512

    c8bf4acc4644b614715eeaf4cda10ba100afeceaab0f7b7cb627f1c6f7676308c0c73e7dbbe6833ec3da1f9c10616e2c28a9ba4fc88e180ff3e0123071c50469

  • \??\PIPE\srvsvc

    MD5

    d41d8cd98f00b204e9800998ecf8427e

    SHA1

    da39a3ee5e6b4b0d3255bfef95601890afd80709

    SHA256

    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

    SHA512

    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

  • memory/668-42-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1488-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2284-8-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

    Filesize

    32KB

  • memory/2284-7-0x000000001B5C0000-0x000000001B8A2000-memory.dmp

    Filesize

    2.9MB

  • memory/2284-6-0x00000000029F0000-0x0000000002A70000-memory.dmp

    Filesize

    512KB

  • memory/2820-14-0x000000001B500000-0x000000001B7E2000-memory.dmp

    Filesize

    2.9MB

  • memory/2820-15-0x0000000001F40000-0x0000000001F48000-memory.dmp

    Filesize

    32KB

  • memory/2852-0-0x000007FEF5923000-0x000007FEF5924000-memory.dmp

    Filesize

    4KB

  • memory/2852-33-0x000000001B1B0000-0x000000001B230000-memory.dmp

    Filesize

    512KB

  • memory/2852-38-0x000007FEF5923000-0x000007FEF5924000-memory.dmp

    Filesize

    4KB

  • memory/2852-39-0x000000001B1B0000-0x000000001B230000-memory.dmp

    Filesize

    512KB

  • memory/2852-1-0x0000000001300000-0x0000000001310000-memory.dmp

    Filesize

    64KB

  • memory/2892-44-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB