Resubmissions

08/09/2026, 16:39

260908-t53d4avcja

08/09/2026, 16:19

260908-tsykdathrf8

Analysis

  • user interaction
    yes
  • max time kernel
    765s
  • max time network
    797s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260710-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/09/2026, 16:19

General

  • Target
    UnixStealerV2/Builder.exe
  • Size 147KB
  • Sample260908-tsykdathrf
  • SHA256 8158bbcd71f29aed2855c6ee6f3e48239e4e2c78739bfd10d441a6d18f11fd40
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Executes dropped EXE 3 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.

  • Accesses Microsoft Outlook profiles 1 TTPs 9 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Contacts third-party web service commonly abused for C2 1 TTPs 4 IoCs

    Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

  • Drops desktop.ini file(s) 3 IoCs
  • Enumerates connected drives 3 TTPs 4 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Looks up external IP address via web service 1 TTPs 2 IoCs

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

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 18 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 3 IoCs

    Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.

  • Checks SCSI registry key(s) 3 TTPs 62 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 6 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies Control Panel 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 3 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: LoadsDriver 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 24 IoCs
  • Suspicious use of WriteProcessMemory 11 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.

  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\UnixStealerV2\Builder.exe
    "C:\Users\Admin\AppData\Local\Temp\UnixStealerV2\Builder.exe"
    1⤵
    • Enumerates connected drives
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:3852
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:4084
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:296
      • C:\Windows\explorer.exe
        explorer.exe /LOADSAVEDWINDOWS
        2⤵
        • Boot or Logon Autostart Execution: Active Setup
        • Drops desktop.ini file(s)
        • Enumerates connected drives
        • Checks SCSI registry key(s)
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1552
        • C:\Users\Admin\Desktop\Unix.exe
          "C:\Users\Admin\Desktop\Unix.exe"
          3⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:204
          • C:\Windows\SYSTEM32\netsh.exe
            "netsh" wlan export profile key=clear folder="C:\Users\Admin\AppData\Local\Temp\UnixStealerWifiExport_bde2902c80564b40b0462937b6d55d08"
            4⤵
            • Event Triggered Execution: Netsh Helper DLL
            PID:4724
          • C:\Windows\SYSTEM32\netsh.exe
            "netsh" wlan show profiles
            4⤵
            • Event Triggered Execution: Netsh Helper DLL
            • System Network Configuration Discovery: Wi-Fi Discovery
            PID:4380
        • C:\Users\Admin\Desktop\Unix.exe
          "C:\Users\Admin\Desktop\Unix.exe"
          3⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4576
          • C:\Windows\SYSTEM32\netsh.exe
            "netsh" wlan export profile key=clear folder="C:\Users\Admin\AppData\Local\Temp\UnixStealerWifiExport_0c0e6a0363fd4ba38e5c3d8e890642e6"
            4⤵
            • Event Triggered Execution: Netsh Helper DLL
            PID:5932
          • C:\Windows\SYSTEM32\netsh.exe
            "netsh" wlan show profiles
            4⤵
            • Event Triggered Execution: Netsh Helper DLL
            • System Network Configuration Discovery: Wi-Fi Discovery
            PID:3960
        • C:\Users\Admin\Desktop\Unix.exe
          "C:\Users\Admin\Desktop\Unix.exe"
          3⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          • outlook_office_path
          • outlook_win_path
          PID:4108
          • C:\Windows\SYSTEM32\netsh.exe
            "netsh" wlan export profile key=clear folder="C:\Users\Admin\AppData\Local\Temp\UnixStealerWifiExport_a93e76882211406f872bfc92e1b548dd"
            4⤵
            • Event Triggered Execution: Netsh Helper DLL
            PID:5016
          • C:\Windows\SYSTEM32\netsh.exe
            "netsh" wlan show profiles
            4⤵
            • Event Triggered Execution: Netsh Helper DLL
            • System Network Configuration Discovery: Wi-Fi Discovery
            PID:1156
      • C:\Windows\System32\ShellHost.exe
        "C:\Windows\System32\ShellHost.exe"
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:5864
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,Control_RunDLL C:\Windows\System32\srchadmin.dll ,
        2⤵
          PID:4080
      • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
        "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
        1⤵
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:5756
      • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
        "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
        1⤵
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:4508
      • C:\Windows\System32\SecurityHealthHost.exe
        \\?\C:\Windows\System32\SecurityHealthHost.exe {08728914-3F57-4D52-9E31-49DAECA5A80A} -Embedding
        1⤵
          PID:3424
        • C:\Windows\system32\svchost.exe
          C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
          1⤵
            PID:840
          • C:\Windows\System32\rundll32.exe
            C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {24AC8F2B-4D4A-4C17-9607-6A4B14068F97} -Embedding
            1⤵
              PID:5276
            • C:\Windows\system32\svchost.exe
              C:\Windows\system32\svchost.exe -k DevicesFlow -s DevicesFlowUserSvc
              1⤵
                PID:6016
              • C:\Windows\system32\AUDIODG.EXE
                C:\Windows\system32\AUDIODG.EXE 0x00000000000004F8 0x0000000000000504
                1⤵
                  PID:1184
                • C:\Windows\SysWOW64\DllHost.exe
                  C:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}
                  1⤵
                  • System Location Discovery: System Language Discovery
                  PID:3228

                Network

                      MITRE ATT&CK Enterprise v16

                      Replay Monitor

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                      Downloads

                      prep_Activatable Class_Hermes_perf.cache

                      • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
                      • Size 599B
                      • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
                      • MD5 SHA1 SHA512 TLSH

                      5a2098e080cf7ac4.automaticDestinations-ms

                      • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\AutomaticDestinations\5a2098e080cf7ac4.automaticDestinations-ms
                      • Size 2KB
                      • SHA256 a2c656b6a950c872661927f913906f5d2cfa8d9aa2a4de900011ee6e3534dd1b
                      • MD5 SHA1 SHA512 TLSH

                      Unix.exe

                      • Path C:\Users\Admin\Desktop\Unix.exe
                      • Size 255KB
                      • SHA256 63c4bae6823263185772923db531f674e14cabc408fcb083c0a5ca0e77d6fea6
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      memory/204-580-0x00000213061D0000-0x0000021306214000-memory.dmp

                      memory/204-581-0x00000213209E0000-0x0000021320A30000-memory.dmp

                      memory/204-582-0x0000021320850000-0x0000021320862000-memory.dmp

                      memory/4508-23-0x000001ED801E0000-0x000001ED802E0000-memory.dmp

                      memory/4508-51-0x000001ED941C0000-0x000001ED941E0000-memory.dmp

                      memory/4508-37-0x000001ED82E00000-0x000001ED82E20000-memory.dmp

                      memory/4508-32-0x000001ED82E80000-0x000001ED82F80000-memory.dmp

                      memory/4508-31-0x000001ED82A20000-0x000001ED82A40000-memory.dmp

                      memory/4508-216-0x000001ED996A0000-0x000001ED997A0000-memory.dmp