Analysis

  • max time kernel
    150s
  • max time network
    145s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    09/10/2026, 19:57

General

  • Target
    file.exe
  • Size 17.9MB
  • Sample261009-ypfmlss1bt
  • SHA256 489109095909eb9b3d60db1a01178080073b068e535735a026d351d446bef1d2
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Badlisted process makes network request 2 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Event Triggered Execution: Component Object Model Hijacking 1 TTPs

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

  • Executes dropped EXE 2 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Registers new Windows logon scripts automatically executed at logon. 1 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Looks up external IP address via web service 1 TTPs 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • Delays execution with timeout.exe 2 IoCs
  • Gathers system information 1 TTPs 1 IoCs

    Runs systeminfo.exe.

  • Modifies registry class 6 IoCs
  • NTFS ADS 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4704
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c timeout /t 600 /nobreak >nul 2>&1 & taskkill /f /pid 4704 >nul 2>&1 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:3272
      • C:\Windows\system32\timeout.exe
        timeout /t 600 /nobreak
        3⤵
        • Delays execution with timeout.exe
        PID:4488
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c timeout /t 900 /nobreak >nul 2>&1 & del /f /q "C:\Users\Admin\AppData\Local\Temp\ss_dbg.txt" "C:\Users\Admin\AppData\Local\Temp\ss_release_debug.log" "C:\Users\Public\ss_release_debug.log"
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:2528
      • C:\Windows\system32\timeout.exe
        timeout /t 900 /nobreak
        3⤵
        • Delays execution with timeout.exe
        PID:3752
    • C:\Windows\System32\rundll32.exe
      rundll32.exe
      2⤵
      • Badlisted process makes network request
      • Reads the TCP/IP host and domain name from the registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2796
      • C:\Windows\system32\systeminfo.exe
        C:\Windows\system32\systeminfo.exe
        3⤵
        • Gathers system information
        PID:2812
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --user-data-dir="C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --no-first-run --disable-gpu --disable-extensions --disable-background-networking --disable-sync --no-startup-window --disable-background-mode --window-position=-32000,-32000 --window-size=1,1 --noerrdialogs --noerrdialogs --headless=new about:blank
        3⤵
          PID:2060
      • C:\Windows\System32\rundll32.exe
        rundll32.exe
        2⤵
        • Drops desktop.ini file(s)
        • NTFS ADS
        PID:1116
        • C:\ProgramData\ARM\Win32Container.exe
          "C:\ProgramData\ARM\Win32Container.exe"
          3⤵
          • Modifies WinLogon for persistence
          • Executes dropped EXE
          • Registers new Windows logon scripts automatically executed at logon.
          • Adds Run key to start application
          • Modifies registry class
          • NTFS ADS
          PID:3620
    • C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
      "C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
      1⤵
        PID:4432
      • C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
        "C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
        1⤵
          PID:2196
        • C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
          "C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
          1⤵
            PID:1172
          • C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
            "C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
            1⤵
              PID:1656
            • C:\ProgramData\ARM\Win32Container.exe
              "C:\ProgramData\ARM\Win32Container.exe"
              1⤵
              • Executes dropped EXE
              • Registers new Windows logon scripts automatically executed at logon.
              • Adds Run key to start application
              • Modifies registry class
              • NTFS ADS
              PID:3028

            Network

                  MITRE ATT&CK Enterprise v16

                  Replay Monitor

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                  Downloads

                  ARMHelper.exe

                  • Path C:\ProgramData\ARM\ARMHelper.exe
                  • Size 2.7MB
                  • SHA256 323fee0ea61ed97c6cab4364972362fa68c7aedefa861f931ec89692b14c5018
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  ss_dbg.txt

                  • Path C:\Users\Admin\AppData\Local\Temp\ss_dbg.txt
                  • Size 421B
                  • SHA256 f30ee79bd82b784c23a7961807d5a7777e6742154e832fee575f3fe84438f101
                  • MD5 SHA1 SHA512 TLSH

                  ss_release_debug.log

                  • Path C:\Users\Admin\AppData\Local\Temp\ss_release_debug.log
                  • Size 455B
                  • SHA256 8a4dc2725378d91934902f1d0da59f59c731e88824137185c8bcffb8f9b6a958
                  • MD5 SHA1 SHA512 TLSH

                  ss_release_debug.log

                  • Path C:\Users\Admin\AppData\Local\Temp\ss_release_debug.log
                  • Size 46B
                  • SHA256 dce1b9b28523bc11777010830dd4d8767cd5451d07cfb4cc8255f2156c0ea761
                  • MD5 SHA1 SHA512

                  ss_release_debug.log

                  • Path C:\Users\Admin\AppData\Local\Temp\ss_release_debug.log
                  • Size 85B
                  • SHA256 0e551400c6996c8f4871fb71a36a10693333a1ec77d7258efd8d2ad43fedbd77
                  • MD5 SHA1 SHA512 TLSH

                  yami_264783

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_264783
                  • Size 256KB
                  • SHA256 b0c72944fc5bd02ac464a83ac972277e38d0dbc674f2a634c0d432bf882ef89a
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_305536

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_305536
                  • Size 224KB
                  • SHA256 ad28f9a5298ae7a8eb785b5ac488af303af360c1e55aca3833cdb57f79a1f861
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_387581

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_387581
                  • Size 20KB
                  • SHA256 2ade7ad8f15eccb025798893f007bc3a04679504411bbad75e4d1f35cf47a65e
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_491762

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_491762
                  • Size 24KB
                  • SHA256 4cc1a146d871eea502899024db7a2ff4ab46d4e787819a0fd75cc74aa7dd9926
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_579963

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_579963
                  • Size 40KB
                  • SHA256 06aeb2f9c1ee642348c091fb27541c143545354c273055ce30832e0f61aedf81
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_610279

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_610279
                  • Size 138KB
                  • SHA256 ec501d01373480b8717bc6e4fd75222ee5d2fc71a231664839c0be2a605b38e9
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_976415

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_976415
                  • Size 50KB
                  • SHA256 92deb9024ca49204bb9a97b2936ac1aaf6e20e437ed40db53a5409bf801c0a20
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_977277

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_977277
                  • Size 160KB
                  • SHA256 9091ac11406f559b228639a023f638aa4461083cf4151878f781b85acde0e2ba
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_abe_key_2060.txt

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_abe_key_2060.txt
                  • Size 85B
                  • SHA256 581d21f2228c3a61fa038c838015da7b1b29f5ba1a86b2f935c0d910b3a9f11e
                  • MD5 SHA1 SHA512 TLSH

                  yami_pipe.txt

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_pipe.txt
                  • Size 77B
                  • SHA256 43db12c9cda8c9179defeec9ce37a194f057c97dad63725a6b02674944d99c87
                  • MD5 SHA1 SHA512 TLSH

                  memory/1116-141-0x0000000180000000-0x00000001800B9000-memory.dmp

                  memory/1116-82-0x000001E9BB9B0000-0x000001E9BB9B1000-memory.dmp

                  memory/1116-86-0x0000000180000000-0x00000001800B9000-memory.dmp

                  memory/1116-96-0x0000000140000000-0x00000001402B8000-memory.dmp

                  memory/2796-26-0x0000000180000000-0x00000001800B9000-memory.dmp

                  memory/2796-43-0x000002245F650000-0x000002245F8C7000-memory.dmp

                  memory/2796-9-0x000002245C360000-0x000002245C361000-memory.dmp

                  memory/2796-28-0x000002245F650000-0x000002245F8C7000-memory.dmp

                  memory/2796-25-0x000002245DEF0000-0x000002245E166000-memory.dmp

                  memory/2796-37-0x000002245F650000-0x000002245F8C7000-memory.dmp

                  memory/2796-16-0x0000000180000000-0x00000001800B9000-memory.dmp

                  memory/2796-13-0x000002245C450000-0x000002245C451000-memory.dmp

                  memory/2796-41-0x000002245F650000-0x000002245F8C7000-memory.dmp

                  memory/2796-5-0x0000000180000000-0x00000001800B9000-memory.dmp

                  memory/2796-248-0x0000000180000000-0x00000001800B9000-memory.dmp