Analysis

  • max time kernel
    150s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-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 1 IoCs
  • Adds Run key to start application 2 TTPs 2 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 4 IoCs
  • NTFS ADS 2 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:1468
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c timeout /t 600 /nobreak >nul 2>&1 & taskkill /f /pid 1468 >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:1572
      • C:\Windows\system32\timeout.exe
        timeout /t 600 /nobreak
        3⤵
        • Delays execution with timeout.exe
        PID:3680
    • 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:4472
      • C:\Windows\system32\timeout.exe
        timeout /t 900 /nobreak
        3⤵
        • Delays execution with timeout.exe
        PID:3536
    • 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:5000
      • C:\Windows\system32\systeminfo.exe
        C:\Windows\system32\systeminfo.exe
        3⤵
        • Gathers system information
        PID:2720
      • 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:3080
      • C:\Windows\System32\rundll32.exe
        rundll32.exe
        2⤵
        • Drops desktop.ini file(s)
        • NTFS ADS
        PID:4872
        • 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:2032
    • 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:3720
      • 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:2840
        • 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:892
          • 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:4244
            • C:\ProgramData\ARM\Win32Container.exe
              "C:\ProgramData\ARM\Win32Container.exe"
              1⤵
              • Executes dropped EXE
              PID:2252

            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 913B
                  • SHA256 76ba7176fa8aef0888279b3214474813d18d78a6e853c8b71f61e1c7bfebdad4
                  • MD5 SHA1 SHA512 TLSH

                  ss_dbg.txt

                  • Path C:\Users\Admin\AppData\Local\Temp\ss_dbg.txt
                  • Size 401B
                  • SHA256 b6701c179dfb668489bd85d648fbac0acda50cba5be7a0a08c2a1390277fe6d8
                  • MD5 SHA1 SHA512 TLSH

                  ss_release_debug.log

                  • Path C:\Users\Admin\AppData\Local\Temp\ss_release_debug.log
                  • Size 455B
                  • SHA256 20c8a95d57b9f740269a68f876fea058604c0e405e1d85cf4a2fbf5deb443aa7
                  • 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

                  ss_wdc_dbg.txt

                  • Path C:\Users\Admin\AppData\Local\Temp\ss_wdc_dbg.txt
                  • Size 443B
                  • SHA256 6d46ebbdb96175a18c5c7cfa4f556e2fd46e1864691b50acbb6188b7d48d1aea
                  • MD5 SHA1 SHA512 TLSH

                  yami_122806

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_122806
                  • Size 138KB
                  • SHA256 764abd0a43cdc4caa4331ecc8010d715aac367586b9ff4e47ab91711edb4bd93
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_325673

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_325673
                  • Size 20KB
                  • SHA256 de48f5c4308a2477450952a8fd6462c411cc966f9e0fb0065a252b3be831a482
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_327332

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_327332
                  • Size 56KB
                  • SHA256 a36a4989ed48954499586d6551e61d6bccfc7bee269b4eab0bb836e394c24c7c
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_365886

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_365886
                  • Size 224KB
                  • SHA256 d781b56555e65272ef4019de8706cba5042fb7afcf0f6e2ca56183ca9567ba8e
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_372147

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_372147
                  • Size 40KB
                  • SHA256 06aeb2f9c1ee642348c091fb27541c143545354c273055ce30832e0f61aedf81
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_636985

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_636985
                  • Size 160KB
                  • SHA256 9091ac11406f559b228639a023f638aa4461083cf4151878f781b85acde0e2ba
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_898412

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_898412
                  • Size 20KB
                  • SHA256 8950bc0cc000e06a92aa7a7fbcff157b777e08a1758ef70c4cd3c46d73f7bcc1
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_987408

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_987408
                  • Size 204KB
                  • SHA256 8c24b66b55bef2d89d1ac69204ec3d5d7b191ba051c7c4c4cddcd66d92575d04
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  yami_abe_key_3080.txt

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_abe_key_3080.txt
                  • Size 85B
                  • SHA256 95e122e2f783ab9340105b92ac0016a77fdd4be11b734a40eb97365366531160
                  • MD5 SHA1 SHA512 TLSH

                  yami_pipe.txt

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_pipe.txt
                  • Size 77B
                  • SHA256 3411554abfcaa82ee9e25b99fe6af838bb08d21a3f81b94c3ac2769f1b025ed6
                  • MD5 SHA1 SHA512 TLSH

                  userTelemetryCache.otc.session

                  • Path C:\Users\Admin\AppData\Local\Temp\yami_sessions_5000\OneDriveLogs\setup\userTelemetryCache.otc.session
                  • Size 20KB
                  • SHA256 b1d237c6c1cb5949f4582e031c1ce5f0e130c4b7cc1fd7fede25d561bd1a898f
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  memory/4872-92-0x0000000180000000-0x00000001800B9000-memory.dmp

                  memory/4872-101-0x0000000140000000-0x00000001402B8000-memory.dmp

                  memory/4872-192-0x0000000180000000-0x00000001800B9000-memory.dmp

                  memory/4872-88-0x0000023773D80000-0x0000023773D81000-memory.dmp

                  memory/5000-28-0x000002254B440000-0x000002254B6B7000-memory.dmp

                  memory/5000-41-0x000002254B440000-0x000002254B6B7000-memory.dmp

                  memory/5000-37-0x000002254B440000-0x000002254B6B7000-memory.dmp

                  memory/5000-43-0x000002254B440000-0x000002254B6B7000-memory.dmp

                  memory/5000-1-0x0000000180000000-0x00000001800B9000-memory.dmp

                  memory/5000-25-0x000002254B1C0000-0x000002254B436000-memory.dmp

                  memory/5000-26-0x0000000180000000-0x00000001800B9000-memory.dmp

                  memory/5000-16-0x0000000180000000-0x00000001800B9000-memory.dmp

                  memory/5000-13-0x0000022548FA0000-0x0000022548FA1000-memory.dmp

                  memory/5000-9-0x0000022548F80000-0x0000022548F81000-memory.dmp

                  memory/5000-277-0x0000000180000000-0x00000001800B9000-memory.dmp