Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    04/11/2026, 14:01

General

  • Target
    Податкове повідомлення-рішення 04.11.2026.473245.pdf.exe
  • Size 29.7MB
  • Sample261104-rblhdadf72
  • SHA256 28c4386ec07652a9aa692e89065ada8925096e739ac6478601dbab198fba9a42
  • 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.

  • Executes dropped EXE 10 IoCs
  • Loads dropped DLL 11 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Drops file in System32 directory 12 IoCs
  • Drops file in Program Files directory 57 IoCs
  • Drops file in Windows directory 23 IoCs
  • Embeds OpenSSL 1 IoCs

    Embeds OpenSSL, may be used to circumvent TLS interception.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 20 IoCs

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

  • System Location Discovery: System Language Discovery 1 TTPs 11 IoCs

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

  • Modifies data under HKEY_USERS 48 IoCs
  • Modifies registry class 24 IoCs
  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 30 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 43 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Податкове повідомлення-рішення 04.11.2026.473245.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Податкове повідомлення-рішення 04.11.2026.473245.pdf.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5032
    • C:\Windows\system32\msiexec.exe
      "C:\Windows\system32\msiexec.exe" /i "C:\ProgramData\3d09f84553221c2e.msi" /qn /norestart ALLUSERS=1
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:3804
  • 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 data under HKEY_USERS
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4624
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 54AC23101FEBD0DF7A9B96A3467141A3
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:2544
    • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" -msi_copy "C:\ProgramData\3d09f84553221c2e.msi"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:264
    • 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
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:2924
    • 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
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:5936
    • 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
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:6056
  • 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
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    PID:2368
  • 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
    • Drops file in System32 directory
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:5540
    • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4728
      • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Reads the TCP/IP host and domain name from the registry
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:4628
    • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:924
    • 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
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:2224

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        e59143d.rbs

        • Path C:\Config.Msi\e59143d.rbs
        • Size 251KB
        • SHA256 7b39b98e9aa6a08374323c97a9e7f37ee03331c4dc69c57349ee30b3aa097519
        • MD5 SHA1 SHA512 SSDEEP TLSH

        EULA.rtf

        • Path C:\Program Files (x86)\Remote Utilities - Host\EULA.rtf
        • Size 23KB
        • SHA256 6ff90bfe3b1805d9b4b71a1bc12268e77fd05480c8ffb2b9c568176b354a62e8
        • 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 9.6MB
        • SHA256 f526c9173c5b1ccb38820656be96b800ff812a7aae18ab284e63834254528a15
        • MD5 SHA1 SHA512 SSDEEP TLSH

        libcodec32.dll

        • Path C:\Program Files (x86)\Remote Utilities - Host\libcodec32.dll
        • Size 5.9MB
        • SHA256 a4574de65c7d3ec0951447bf2a75f4ff392f4a28c0773cb9ea3afd61675f8ca8
        • 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 18.7MB
        • SHA256 9949c3c80712de9a31ea95911adfe89807ffe9f73d238bd4d70b5ad79a0f1856
        • MD5 SHA1 SHA512 SSDEEP TLSH

        rutserv.exe

        • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
        • Size 22.1MB
        • SHA256 7483a4dcafe94545cedce7c35671690f304c9ea1f943d692f7278898a295b114
        • 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

        3d09f84553221c2e.msi

        • Path C:\ProgramData\3d09f84553221c2e.msi
        • Size 28.7MB
        • SHA256 618985288f335b8a116a1db59a055631817f3406a92e6a1bdefdc524d65e6db1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSI18CE.tmp

        • Path C:\Windows\Installer\MSI18CE.tmp
        • Size 165KB
        • SHA256 1f6f0d9f136bc170cfbc48a1015113947087ac27aed1e3e91673ffc91b9f390b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/264-83-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/264-84-0x000000006D280000-0x000000006D9CF000-memory.dmp

        memory/924-230-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-223-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-216-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-237-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-209-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-202-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-195-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-188-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-156-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-177-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-170-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-163-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/924-157-0x000000006D280000-0x000000006D9CF000-memory.dmp

        memory/2224-184-0x000000006D280000-0x000000006D9CF000-memory.dmp

        memory/2224-183-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/2368-122-0x000000006D280000-0x000000006D9CF000-memory.dmp

        memory/2368-121-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/2924-105-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/2924-106-0x000000006D280000-0x000000006D9CF000-memory.dmp

        memory/4628-152-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/4628-153-0x000000006D280000-0x000000006D9CF000-memory.dmp

        memory/4728-154-0x0000000000170000-0x00000000014D7000-memory.dmp

        memory/4728-155-0x000000006D280000-0x000000006D9CF000-memory.dmp

        memory/5540-190-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-211-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-239-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-179-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-158-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-197-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-146-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-204-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-172-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-148-0x000000006D280000-0x000000006D9CF000-memory.dmp

        memory/5540-232-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-218-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-165-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5540-225-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5936-110-0x0000000000590000-0x0000000001C6E000-memory.dmp

        memory/5936-112-0x000000006D280000-0x000000006D9CF000-memory.dmp

        memory/6056-141-0x000000006D280000-0x000000006D9CF000-memory.dmp

        memory/6056-137-0x0000000000590000-0x0000000001C6E000-memory.dmp