Analysis

  • max time kernel
    149s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    26-05-2024 12:16

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 4 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 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).

  • 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 8 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 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:2908
    • 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:2844
    • 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:2864
    • 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:2496
    • 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:2488
    • 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:2024
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {48B11623-251C-4CAF-AFAC-F932D19D33A4} S-1-5-21-268080393-3149932598-1824759070-1000:UHRQKJCP\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2180
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1040
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2112

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

    fc61001c0b0972e697a37f0407b38dd8

    SHA1

    dfce18ee1afb3e35c758fcad409eac33afbb3486

    SHA256

    ba3e7d0a58c508b0a17277a6628d14945d122a5cac02eb6bb179faaa6428c01e

    SHA512

    663898f70cd10b1437de59cb4cd858ece7084bbfb187eddadd17115315a4e31cfa05070b6a567e87f84aabe44e91f8c9514b6a667fe2d283638c178235f0d483

  • 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/1040-37-0x0000000001060000-0x0000000001070000-memory.dmp

    Filesize

    64KB

  • memory/2112-40-0x0000000000020000-0x0000000000030000-memory.dmp

    Filesize

    64KB

  • memory/2844-6-0x0000000002800000-0x0000000002880000-memory.dmp

    Filesize

    512KB

  • memory/2844-7-0x000000001B590000-0x000000001B872000-memory.dmp

    Filesize

    2.9MB

  • memory/2844-8-0x00000000027E0000-0x00000000027E8000-memory.dmp

    Filesize

    32KB

  • memory/2864-14-0x000000001B7B0000-0x000000001BA92000-memory.dmp

    Filesize

    2.9MB

  • memory/2864-15-0x0000000001F70000-0x0000000001F78000-memory.dmp

    Filesize

    32KB

  • memory/2908-31-0x000000001B370000-0x000000001B3F0000-memory.dmp

    Filesize

    512KB

  • memory/2908-32-0x000007FEF5353000-0x000007FEF5354000-memory.dmp

    Filesize

    4KB

  • memory/2908-33-0x000000001B370000-0x000000001B3F0000-memory.dmp

    Filesize

    512KB

  • memory/2908-0-0x000007FEF5353000-0x000007FEF5354000-memory.dmp

    Filesize

    4KB

  • memory/2908-1-0x00000000000A0000-0x00000000000B0000-memory.dmp

    Filesize

    64KB