Analysis

  • max time kernel
    83s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    27/05/2026, 15:07

General

  • Target
    host-7.7.3.0.exe
  • Size 30.5MB
  • Sample260527-shdxjsbs2x
  • SHA256 ec70c730cb6fa77cd7da6c61ed24348c6b277dc786ecac0e52e0f78784f2b5ed
  • 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.

  • Badlisted process makes network request 6 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.

  • UPX packed file 13 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks installed software on the system 1 TTPs

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

  • Loads dropped DLL 1 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).

  • 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.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\host-7.7.3.0.exe
    "C:\Users\Admin\AppData\Local\Temp\host-7.7.3.0.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4440
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\RUT_{4D59AA1A-B690-4460-AA93-1E9BFDD1A2B8}\installer.msi"
      2⤵
      • Badlisted process makes network request
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:3728
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4468
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding DADA7EB3B2F90F5FBBA59548B3121302 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:2508
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3988
      • 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\RUT_{4D59AA1A-B690-4460-AA93-1E9BFDD1A2B8}\installer.msi"
        2⤵
          PID:4244
        • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
          "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -config -instalrt
          2⤵
            PID:2192
          • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
            "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /silentinstall
            2⤵
              PID:2300
            • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
              "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -firewall
              2⤵
                PID:388
              • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /start
                2⤵
                  PID:2216
                • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                  "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /CONFIG /SETSECURITY
                  2⤵
                    PID:3360
                • C:\Windows\system32\vssvc.exe
                  C:\Windows\system32\vssvc.exe
                  1⤵
                  • Checks SCSI registry key(s)
                  PID:1836
                • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                  "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -service
                  1⤵
                    PID:1572
                  • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                    "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -service
                    1⤵
                      PID:2200
                      • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                        "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe"
                        2⤵
                          PID:4728
                          • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                            "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray
                            3⤵
                              PID:1984
                          • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                            "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray -instalrt
                            2⤵
                              PID:4296

                          Network

                                MITRE ATT&CK Enterprise v16

                                Replay Monitor

                                Loading Replay Monitor...

                                Downloads

                                e59cf6d.rbs

                                • Path C:\Config.Msi\e59cf6d.rbs
                                • Size 16KB
                                • SHA256 908b799170924a9077d3c0f1b943724df82e33fbdbffc1fbdd7a1bc59ba190fa
                                • 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

                                libasset32.dll

                                • Path C:\Program Files (x86)\Remote Utilities - Host\libasset32.dll
                                • Size 7.1MB
                                • SHA256 a025da3d554bbe23d73c629ac0429d98b05c6a0af2c4fc9590217349055fc099
                                • 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

                                rfusclient.exe

                                • Path C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                                • Size 15.6MB
                                • SHA256 7906a81b1dec372b4c232306678fda0cbc46db41e3db0c06b858d54d60cd7ab6
                                • MD5 SHA1 SHA512 SSDEEP TLSH

                                rfusclient.exe

                                • Path C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                                • Size 7.8MB
                                • SHA256 d2cc96e79a21a4c9222a723302caa05ab347efa7c8af71db5cea7e871d84bb1d
                                • MD5 SHA1 SHA512 SSDEEP TLSH

                                rutserv.exe

                                • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                                • Size 21.4MB
                                • SHA256 d8e6765d0dbfbdf436f88c7cac85476b41edd6ded12f24bb34fe3932737ba613
                                • 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

                                install.log

                                • Path C:\ProgramData\Remote Utilities\install.log
                                • Size 639B
                                • SHA256 ea6bf10dc3ec506426976206d77d761ab15307693bca1036f6313b64e0dfd8c8
                                • MD5 SHA1 SHA512 TLSH

                                0766DB9AB186806BB9A6B6802D3BA734

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\0766DB9AB186806BB9A6B6802D3BA734
                                • Size 2KB
                                • SHA256 67074b6abf9269cd3be0cd740de8ce3bf5eafbcc7d80d3d24aef34af526b1952
                                • MD5 SHA1 SHA512 TLSH

                                357F04AD41BCF5FE18FCB69F60C6680F_DF8B1CCAD690136970E760B4D18D549F

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\357F04AD41BCF5FE18FCB69F60C6680F_DF8B1CCAD690136970E760B4D18D549F
                                • Size 1KB
                                • SHA256 f78c2288848e3c3fe0dc5d7b0345044ab3d44f0e54a088f0f185d5245b6d7364
                                • MD5 SHA1 SHA512 TLSH

                                9CB4373A4252DE8D2212929836304EC5_1AB74AA2E3A56E1B8AD8D3FEC287554E

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\9CB4373A4252DE8D2212929836304EC5_1AB74AA2E3A56E1B8AD8D3FEC287554E
                                • Size 1KB
                                • SHA256 5f2fe9bb80f64b0b967df6fe9814a046b5f9cac48a06d56843142661815d04df
                                • MD5 SHA1 SHA512 TLSH

                                0766DB9AB186806BB9A6B6802D3BA734

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\0766DB9AB186806BB9A6B6802D3BA734
                                • Size 192B
                                • SHA256 f04addd03a607cbe16d97cbe4c6fb6332fc8e1a94d9ffb45522716e2712c1987
                                • MD5 SHA1 SHA512 TLSH

                                357F04AD41BCF5FE18FCB69F60C6680F_DF8B1CCAD690136970E760B4D18D549F

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\357F04AD41BCF5FE18FCB69F60C6680F_DF8B1CCAD690136970E760B4D18D549F
                                • Size 540B
                                • SHA256 2b7c1fc2b5a7845c487c42a2430be6553b8af3623ed6d5bc4a5e5584c0c6591b
                                • MD5 SHA1 SHA512 TLSH

                                9CB4373A4252DE8D2212929836304EC5_1AB74AA2E3A56E1B8AD8D3FEC287554E

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\9CB4373A4252DE8D2212929836304EC5_1AB74AA2E3A56E1B8AD8D3FEC287554E
                                • Size 536B
                                • SHA256 81c80a0e04751defde25fb9d6217e36884a56bb644406a65d0d242ccf2ca2ba1
                                • MD5 SHA1 SHA512 TLSH

                                MSI83.tmp

                                • Path C:\Users\Admin\AppData\Local\Temp\MSI83.tmp
                                • Size 649KB
                                • SHA256 085eacfc60a533c33950ac55f17a3afa5b7baf6e5ba73ec112adf5ed88177175
                                • MD5 SHA1 SHA512 SSDEEP TLSH

                                installer.msi

                                • Path C:\Users\Admin\AppData\Local\Temp\RUT_{4D59AA1A-B690-4460-AA93-1E9BFDD1A2B8}\installer.msi
                                • Size 28.8MB
                                • SHA256 7eb4cc80446cf38ba290e0bdd97738179d4d9fa99be654e2dceb7e8761b64744
                                • MD5 SHA1 SHA512 SSDEEP TLSH

                                metadata-2

                                • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
                                • Size 24.6MB
                                • SHA256 23ee700078066782851d7c7d07b098011e4f4291470f535f17036301719596a0
                                • MD5 SHA1 SHA512 SSDEEP TLSH

                                {c9fa6f44-aba4-4966-a41d-34d1cade2f93}_OnDiskSnapshotProp

                                • Path \??\Volume{0dc89376-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{c9fa6f44-aba4-4966-a41d-34d1cade2f93}_OnDiskSnapshotProp
                                • Size 6KB
                                • SHA256 0ceaa8b3920d1e0581aedcb6ed28f2a3963106b02dd2b86f617fbe04f021c828
                                • MD5 SHA1 SHA512 SSDEEP TLSH

                                memory/388-161-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/388-162-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/1572-166-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/1572-167-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/1984-229-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/1984-228-0x00000000003D0000-0x000000000140E000-memory.dmp

                                memory/2192-145-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/2192-144-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/2200-186-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/2200-187-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/2200-212-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/2200-225-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/2216-195-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/2216-182-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/2216-194-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/2216-183-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/2300-155-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/2300-156-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/3360-185-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/3360-231-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/3360-184-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/3360-230-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/3360-223-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/3360-210-0x00000000000B0000-0x00000000016EC000-memory.dmp

                                memory/4244-137-0x00000000003D0000-0x000000000140E000-memory.dmp

                                memory/4244-138-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/4296-217-0x00000000003D0000-0x000000000140E000-memory.dmp

                                memory/4296-218-0x000000006D280000-0x000000006D9B6000-memory.dmp

                                memory/4296-241-0x00000000003D0000-0x000000000140E000-memory.dmp

                                memory/4440-35-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-37-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-9-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-36-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-19-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-7-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-143-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-34-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-6-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-4-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-221-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-42-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-33-0x0000000000B00000-0x0000000004CC0000-memory.dmp

                                memory/4440-5-0x00000000051D0000-0x00000000051D1000-memory.dmp

                                memory/4728-214-0x00000000003D0000-0x000000000140E000-memory.dmp

                                memory/4728-239-0x00000000003D0000-0x000000000140E000-memory.dmp

                                memory/4728-215-0x000000006D280000-0x000000006D9B6000-memory.dmp