Analysis

  • max time kernel
    118s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-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 (539) amount of remote hosts 1 TTPs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 8 IoCs
  • Loads dropped DLL 9 IoCs
  • Badlisted process makes network request 11 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 18 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 9 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 4 IoCs
  • Modifies registry class 24 IoCs
  • Suspicious behavior: EnumeratesProcesses 24 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 34 IoCs
  • Suspicious use of WriteProcessMemory 8 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
    PID:4544
  • 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 WriteProcessMemory
    PID:1676
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding F12C2C8B6C7587FAC42B3A9C58091209 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:340
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3580
      • 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⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:3224
      • 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
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:3852
      • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /silentinstall
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:516
      • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -firewall
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:3440
      • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /start
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:5072
      • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /CONFIG /SETSECURITY
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:4532
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:4640
    • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -service
      1⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:1140
    • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -service
      1⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:3348
      • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe"
        2⤵
          PID:2912
          • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
            "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray
            3⤵
              PID:5020
          • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
            "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray -instalrt
            2⤵
              PID:2120

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

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                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

                6.msi

                • Path C:\ProgramData\Remote Utilities\msi\70840_{7909B304-45ED-452D-A7A6-3C67869864A1}\6.msi
                • Size 27.6MB
                • SHA256 42a2e61a257eb64229a74a6c633e0420cc5ed217871d36d1e4e4577ae494421f
                • MD5 SHA1 SHA512 SSDEEP TLSH

                9CB4373A4252DE8D2212929836304EC5_6C354C532D063DF5607A63BA827F5164

                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\9CB4373A4252DE8D2212929836304EC5_6C354C532D063DF5607A63BA827F5164
                • Size 1KB
                • SHA256 d169c368858e1a5d7d48123ffd0a131171ff170d36a6d8de876a91805a808d68
                • MD5 SHA1 SHA512 TLSH

                A1D627669EFC8CD4F21BCF387D97F9B5_65802118A1B42BB7E866C4DD04A00F68

                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\A1D627669EFC8CD4F21BCF387D97F9B5_65802118A1B42BB7E866C4DD04A00F68
                • Size 1KB
                • SHA256 61f0ee8dbc30d0782b27d0836072196686c9d087a882b1a49f682709267a6bef
                • MD5 SHA1 SHA512 TLSH

                9CB4373A4252DE8D2212929836304EC5_6C354C532D063DF5607A63BA827F5164

                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\9CB4373A4252DE8D2212929836304EC5_6C354C532D063DF5607A63BA827F5164
                • Size 532B
                • SHA256 d418b67dfefd18aeb23adeb070da694b70c285ae68c190f823d179173670ae10
                • MD5 SHA1 SHA512 TLSH

                A1D627669EFC8CD4F21BCF387D97F9B5_65802118A1B42BB7E866C4DD04A00F68

                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\A1D627669EFC8CD4F21BCF387D97F9B5_65802118A1B42BB7E866C4DD04A00F68
                • Size 540B
                • SHA256 1344fa47a2bf2dd2745908d548b2c435e3c73c7cccd492cad7818af9aaf9671d
                • MD5 SHA1 SHA512 TLSH

                MSIB4E4.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\MSIB4E4.tmp
                • Size 165KB
                • SHA256 1f6f0d9f136bc170cfbc48a1015113947087ac27aed1e3e91673ffc91b9f390b
                • MD5 SHA1 SHA512 SSDEEP TLSH

                metadata-2

                • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
                • Size 24.1MB
                • SHA256 b6a505399e0c6190db9d9ca7e3911ba7c3757e2ea590dbea50a51a3883be6fc5
                • MD5 SHA1 SHA512 SSDEEP TLSH

                {aff3ff4f-0188-4cb5-bcbc-c55967530ea2}_OnDiskSnapshotProp

                • Path \??\Volume{4588d6e0-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{aff3ff4f-0188-4cb5-bcbc-c55967530ea2}_OnDiskSnapshotProp
                • Size 6KB
                • SHA256 a65cc99520ac9081b39776c8269f36e009fbac9ad11a8106203e7e08d017b8c8
                • MD5 SHA1 SHA512 SSDEEP TLSH

                memory/516-134-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/516-133-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/1140-144-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/1140-143-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/2120-202-0x0000000000700000-0x00000000018B5000-memory.dmp

                memory/2120-169-0x0000000000700000-0x00000000018B5000-memory.dmp

                memory/2120-170-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/2120-185-0x0000000000700000-0x00000000018B5000-memory.dmp

                memory/2912-167-0x0000000000700000-0x00000000018B5000-memory.dmp

                memory/2912-183-0x0000000000700000-0x00000000018B5000-memory.dmp

                memory/2912-168-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/3224-105-0x0000000000700000-0x00000000018B5000-memory.dmp

                memory/3224-106-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/3348-195-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/3348-176-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/3348-160-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/3348-159-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/3440-138-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/3440-139-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/3852-125-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/3852-124-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/4532-171-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/4532-155-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/4532-154-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/5020-182-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/5020-181-0x0000000000700000-0x00000000018B5000-memory.dmp

                memory/5072-157-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/5072-158-0x000000006D280000-0x000000006D9B6000-memory.dmp

                memory/5072-152-0x0000000000AD0000-0x0000000002150000-memory.dmp

                memory/5072-153-0x000000006D280000-0x000000006D9B6000-memory.dmp