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Resubmissions

07/08/2024, 21:46

240807-1m3qgayapb 10

07/08/2024, 21:41

240807-1jzveavbnj 10

Analysis

  • max time kernel
    145s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/08/2024, 21:46

General

  • Target

    Cleaner.exe

  • Size

    172KB

  • MD5

    9229077d00bad648e91aaf30bd096567

  • SHA1

    83eba361175f6c5dd71f740d527ab853a504d15b

  • SHA256

    1eca23db92c0319d414040c2ff9a240d57f806290e1f0238d696fea761c5d948

  • SHA512

    a8d6ac08eb8a2d74791238bfd73cda0062ac4a706bba6a61472efd4a062e2e611661a931d0d14a7edd52a833be830c254dbc14b184ae30a013687d547bc105a7

  • SSDEEP

    3072:IuAN13vRxKBL+b0kb1zehFjO/G16Bz65/M6If+3Js+3JFkKeTnZ:KRYib0y1ihf16xBt25

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:1990

Attributes
  • Install_directory

    %AppData%

  • install_file

    cleaner.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Scheduled Task/Job: Scheduled Task 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 2 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\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\Cleaner.exe"
    1⤵
    • Checks computer location settings
    • 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:2612
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "cleaner" /tr "C:\Users\Admin\AppData\Roaming\cleaner.exe"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:1580
  • C:\Users\Admin\AppData\Roaming\cleaner.exe
    C:\Users\Admin\AppData\Roaming\cleaner.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:736
  • C:\Users\Admin\AppData\Roaming\cleaner.exe
    C:\Users\Admin\AppData\Roaming\cleaner.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:212

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\cleaner.exe.log

    Filesize

    654B

    MD5

    2ff39f6c7249774be85fd60a8f9a245e

    SHA1

    684ff36b31aedc1e587c8496c02722c6698c1c4e

    SHA256

    e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

    SHA512

    1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

    Filesize

    172KB

    MD5

    9229077d00bad648e91aaf30bd096567

    SHA1

    83eba361175f6c5dd71f740d527ab853a504d15b

    SHA256

    1eca23db92c0319d414040c2ff9a240d57f806290e1f0238d696fea761c5d948

    SHA512

    a8d6ac08eb8a2d74791238bfd73cda0062ac4a706bba6a61472efd4a062e2e611661a931d0d14a7edd52a833be830c254dbc14b184ae30a013687d547bc105a7

  • memory/736-12-0x00007FFDD9FF0000-0x00007FFDDAAB1000-memory.dmp

    Filesize

    10.8MB

  • memory/736-14-0x00007FFDD9FF0000-0x00007FFDDAAB1000-memory.dmp

    Filesize

    10.8MB

  • memory/2612-0-0x00007FFDD9FF3000-0x00007FFDD9FF5000-memory.dmp

    Filesize

    8KB

  • memory/2612-1-0x0000000000330000-0x0000000000362000-memory.dmp

    Filesize

    200KB

  • memory/2612-6-0x00007FFDD9FF0000-0x00007FFDDAAB1000-memory.dmp

    Filesize

    10.8MB

  • memory/2612-7-0x00007FFDD9FF3000-0x00007FFDD9FF5000-memory.dmp

    Filesize

    8KB

  • memory/2612-8-0x00007FFDD9FF0000-0x00007FFDDAAB1000-memory.dmp

    Filesize

    10.8MB