Analysis

  • max time kernel
    101s
  • max time network
    154s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    28/07/2026, 11:01

General

  • Target
    6.msi
  • Size 27.6MB
  • Sample260728-m4sd6svdpc
  • SHA256 42a2e61a257eb64229a74a6c633e0420cc5ed217871d36d1e4e4577ae494421f
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: RuRAT

    RuRAT is a remote admin tool sold as legitimate software but regularly abused in malicious phishing campaigns.

  • Contacts a large (528) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 IoCs
  • Badlisted process makes network request 2 IoCs

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

  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Drops file in Program Files directory 57 IoCs
  • Drops file in Windows directory 20 IoCs
  • Embeds OpenSSL 1 IoCs

    Embeds OpenSSL, may be used to circumvent TLS interception.

  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

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

  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 26 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\6.msi
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    PID:3704
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2520
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 83B09666BB5E9F555764EBF107E1B073 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:792
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:1280
      • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" -msi_copy "C:\Users\Admin\AppData\Local\Temp\6.msi"
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:2424
      • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -config -instalrt
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Modifies data under HKEY_USERS
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:3772
      • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /silentinstall
        2⤵
          PID:2188
        • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
          "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -firewall
          2⤵
            PID:1232
          • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
            "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /start
            2⤵
              PID:5440
            • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
              "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /CONFIG /SETSECURITY
              2⤵
                PID:4404
            • C:\Windows\system32\vssvc.exe
              C:\Windows\system32\vssvc.exe
              1⤵
              • Checks SCSI registry key(s)
              PID:1360
            • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
              "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -service
              1⤵
                PID:5192
              • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -service
                1⤵
                  PID:4636
                  • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                    "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe"
                    2⤵
                      PID:2352
                      • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                        "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray
                        3⤵
                          PID:4960
                      • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                        "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray -instalrt
                        2⤵
                          PID:1424

                      Network

                            MITRE ATT&CK Enterprise v16

                            Replay Monitor

                            Loading Replay Monitor...

                            Downloads

                            EULA.rtf

                            • Path C:\Program Files (x86)\Remote Utilities - Host\EULA.rtf
                            • Size 63KB
                            • SHA256 ff89e44b7e6b7c8c9a84c67e40bde6491f851b0e6e4143ac8f665538eec11e87
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            Privacy_policy.rtf

                            • Path C:\Program Files (x86)\Remote Utilities - Host\Privacy_policy.rtf
                            • Size 139KB
                            • SHA256 1fcb0c18d74b4157752a5776ca47bf31f893453b4bcb82ba67b402769d054c26
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            eventmsg.dll

                            • Path C:\Program Files (x86)\Remote Utilities - Host\eventmsg.dll
                            • Size 57KB
                            • SHA256 badd947460e6ac9ef7d9abc286054b5b73e17ab5694f827f26d56203974f1ea2
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            libasset32.dll

                            • Path C:\Program Files (x86)\Remote Utilities - Host\libasset32.dll
                            • Size 9.4MB
                            • SHA256 299b3f5e49d3303e0a4793fee52a1165c340a560729115f1a4d421d6f0416fa5
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            libcodec32.dll

                            • Path C:\Program Files (x86)\Remote Utilities - Host\libcodec32.dll
                            • Size 5.9MB
                            • SHA256 a4a53244ea6bafa55c6f1c4b13da9a6a77e758842593e51b01b34dc137465930
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            licenses.txt

                            • Path C:\Program Files (x86)\Remote Utilities - Host\licenses.txt
                            • Size 19KB
                            • SHA256 4ef24da2e7933364af0c7918207927283d0b7664c615b888cc80843d7a62faa4
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            rfusclient.exe

                            • Path C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                            • Size 17.0MB
                            • SHA256 e4b203c315f44799e4945c3b95501b9bf5480bda5ff596dadbfebdb39996020a
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            rutserv.exe

                            • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                            • Size 21.7MB
                            • SHA256 6fc8237bbb1cb778bf7735fd92963cd1f95acd44e7c987c40e9349ed5be85327
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            vp8decoder.dll

                            • Path C:\Program Files (x86)\Remote Utilities - Host\vp8decoder.dll
                            • Size 384KB
                            • SHA256 851093c801f9f2f3ba670ff2c14c0a673b17efd72731c28a49ca3dcb64b57718
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            vp8encoder.dll

                            • Path C:\Program Files (x86)\Remote Utilities - Host\vp8encoder.dll
                            • Size 1.6MB
                            • SHA256 1fad67e1677401751b4c1ef7d18167174f72c247d8656e99a91104901d1b1400
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            webmmux.dll

                            • Path C:\Program Files (x86)\Remote Utilities - Host\webmmux.dll
                            • Size 264KB
                            • SHA256 1a1b4441fc6fdaf8b9d4a5de3e5855e15217e3810f4aca21a5ca9bb70afab5b4
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            webmvorbisdecoder.dll

                            • Path C:\Program Files (x86)\Remote Utilities - Host\webmvorbisdecoder.dll
                            • Size 369KB
                            • SHA256 2d2a368c897f3aadeb4a8d0f46016f0148799fdc7b18059f1a6cce62883ae7de
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            webmvorbisencoder.dll

                            • Path C:\Program Files (x86)\Remote Utilities - Host\webmvorbisencoder.dll
                            • Size 864KB
                            • SHA256 f858c62cac8d5063a3cffb8a7beb241725b94ab326e0bd2442dacb8e70461721
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            MSIBD6A.tmp

                            • Path C:\Users\Admin\AppData\Local\Temp\MSIBD6A.tmp
                            • Size 165KB
                            • SHA256 1f6f0d9f136bc170cfbc48a1015113947087ac27aed1e3e91673ffc91b9f390b
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            metadata-2

                            • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
                            • Size 26.1MB
                            • SHA256 9fc949d95ffaff3324d36cf506ae1b34184874d4ed25083a79b990eece7d58eb
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            {8347543d-839f-41f6-b263-1b52e60be6c2}_OnDiskSnapshotProp

                            • Path \??\Volume{c61fbfff-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{8347543d-839f-41f6-b263-1b52e60be6c2}_OnDiskSnapshotProp
                            • Size 6KB
                            • SHA256 d6e0f016e6aa76df9b4299e63f837cfc2770d2e4c8ec35d407c74a4750d0165f
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            memory/1232-123-0x0000000000BB0000-0x0000000002230000-memory.dmp

                            memory/1232-124-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/1424-161-0x0000000000350000-0x0000000001505000-memory.dmp

                            memory/1424-176-0x0000000000350000-0x0000000001505000-memory.dmp

                            memory/1424-162-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/2188-117-0x0000000000BB0000-0x0000000002230000-memory.dmp

                            memory/2188-118-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/2352-174-0x0000000000350000-0x0000000001505000-memory.dmp

                            memory/2352-159-0x0000000000350000-0x0000000001505000-memory.dmp

                            memory/2352-160-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/2424-90-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/2424-89-0x0000000000350000-0x0000000001505000-memory.dmp

                            memory/3772-106-0x0000000000BB0000-0x0000000002230000-memory.dmp

                            memory/3772-107-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/4404-136-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/4404-135-0x0000000000BB0000-0x0000000002230000-memory.dmp

                            memory/4636-157-0x0000000000BB0000-0x0000000002230000-memory.dmp

                            memory/4636-139-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/4636-138-0x0000000000BB0000-0x0000000002230000-memory.dmp

                            memory/4636-172-0x0000000000BB0000-0x0000000002230000-memory.dmp

                            memory/4960-169-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/4960-168-0x0000000000350000-0x0000000001505000-memory.dmp

                            memory/5192-127-0x0000000000BB0000-0x0000000002230000-memory.dmp

                            memory/5192-128-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/5440-148-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/5440-144-0x0000000000BB0000-0x0000000002230000-memory.dmp

                            memory/5440-134-0x000000006D280000-0x000000006D9B6000-memory.dmp

                            memory/5440-133-0x0000000000BB0000-0x0000000002230000-memory.dmp