Analysis

  • max time kernel
    106s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-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 7 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • UPX packed file 11 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.

  • Drops file in Windows directory 2 IoCs
  • 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 3 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⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3988
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\RUT_{585B8D4D-8E53-4AA2-991C-A41D6496EF58}\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:3960
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2224
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 73EE1A1D20B8668F1503FD0322B75BF3 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:3460
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:1532
      • 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_{585B8D4D-8E53-4AA2-991C-A41D6496EF58}\installer.msi"
        2⤵
          PID:1348
        • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
          "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -config -instalrt
          2⤵
            PID:1336
          • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
            "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /silentinstall
            2⤵
              PID:740
            • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
              "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -firewall
              2⤵
                PID:3560
              • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /start
                2⤵
                  PID:4028
                • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                  "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /CONFIG /SETSECURITY
                  2⤵
                    PID:1272
                • C:\Windows\system32\vssvc.exe
                  C:\Windows\system32\vssvc.exe
                  1⤵
                  • Checks SCSI registry key(s)
                  PID:208
                • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                  "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -service
                  1⤵
                    PID:4404
                  • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                    "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -service
                    1⤵
                      PID:2676
                      • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                        "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe"
                        2⤵
                          PID:4864
                        • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                          "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray -instalrt
                          2⤵
                            PID:3064

                        Network

                              MITRE ATT&CK Enterprise v16

                              Replay Monitor

                              Loading Replay Monitor...

                              Downloads

                              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 5.6MB
                              • SHA256 3cee48215318e6c617b8b249c8629bdd6a4aefa50f9653d2787c0db3c008af0a
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              libasset32.dll

                              • Path C:\Program Files (x86)\Remote Utilities - Host\libasset32.dll
                              • Size 4.8MB
                              • SHA256 786426c5198e1f1b380f2aabee9fd617c16a40e30c7ae3627cdcf6540de93cb0
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              libasset32.dll

                              • Path C:\Program Files (x86)\Remote Utilities - Host\libasset32.dll
                              • Size 5.4MB
                              • SHA256 805bd62f51fcf22699064682c4597553ed9cda680bd66f02ebd32222b52fc02f
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              libasset32.dll

                              • Path C:\Program Files (x86)\Remote Utilities - Host\libasset32.dll
                              • Size 4.4MB
                              • SHA256 e8c5cc0ee253fc21c9baf282674fc8ac3afe27be5ab3f8568951944d1bb922a1
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              libasset32.dll

                              • Path C:\Program Files (x86)\Remote Utilities - Host\libasset32.dll
                              • Size 3.8MB
                              • SHA256 5c1c00905da73c2ae81839729aab5fdb215ed86d6da9662b6b5637621dd3f231
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              libasset32.dll

                              • Path C:\Program Files (x86)\Remote Utilities - Host\libasset32.dll
                              • Size 3.6MB
                              • SHA256 b40f9db9a8d5d4c5ecd2bdad83ffeaacbec3b52a6d7c7f5685d569497ee54b85
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              libcodec32.dll

                              • Path C:\Program Files (x86)\Remote Utilities - Host\libcodec32.dll
                              • Size 4.1MB
                              • SHA256 0f5a57597c9d27b9e8f2551f0818c1b7812be50522b0af3ee68f1bd1d7d7b3d5
                              • 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 4.1MB
                              • SHA256 ceb8e1ea9b7e38d4abf7080ea45ca71a067b29709bb5166b52c3f1163e1ccb1a
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              rfusclient.exe

                              • Path C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
                              • Size 3.9MB
                              • SHA256 dd6a0b50654e3f4fd386c9542030787338af6c1e16f4998697843ea06aca9424
                              • 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

                              rutserv.exe

                              • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                              • Size 19.3MB
                              • SHA256 43fbf2dbfc1240589acfa7cead019617dc9a4c690ab8c7a498761d21336ad445
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              rutserv.exe

                              • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                              • Size 5.2MB
                              • SHA256 ab88c1e01ba2874624e84b5d0b8ddfabaabc721111fc3fc90b27c1ab794c2937
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              rutserv.exe

                              • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                              • Size 5.0MB
                              • SHA256 94ac0a300a06ee277973fb50bfbf03c120772adf2f219774a726c922e268b8f2
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              rutserv.exe

                              • Path C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
                              • Size 4.6MB
                              • SHA256 e6fbad177519ec9cc28f2d1ebc631da1c3c626942c82814847ff33f19635add2
                              • 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 89cf972574cb6033d0f3f1c1e3c2565696b268cd5817473b83324c525ede313a
                              • 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 24960a1e825bd664456326f3d74978c827dfa9766c5c2cb7f034d4a8afaec26f
                              • MD5 SHA1 SHA512 TLSH

                              357F04AD41BCF5FE18FCB69F60C6680F_DF8B1CCAD690136970E760B4D18D549F

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\357F04AD41BCF5FE18FCB69F60C6680F_DF8B1CCAD690136970E760B4D18D549F
                              • Size 540B
                              • SHA256 7fe3ee5eea68da2b9711a02e247916388fb96be619a2fcc8bd2472895a912fe7
                              • MD5 SHA1 SHA512 TLSH

                              9CB4373A4252DE8D2212929836304EC5_1AB74AA2E3A56E1B8AD8D3FEC287554E

                              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\9CB4373A4252DE8D2212929836304EC5_1AB74AA2E3A56E1B8AD8D3FEC287554E
                              • Size 536B
                              • SHA256 e3dab3d4410cf00d0ca085c2480ee048e4485b3e6c748eb1c328a6be8fee443b
                              • MD5 SHA1 SHA512 TLSH

                              MSI4E8.tmp

                              • Path C:\Users\Admin\AppData\Local\Temp\MSI4E8.tmp
                              • Size 649KB
                              • SHA256 085eacfc60a533c33950ac55f17a3afa5b7baf6e5ba73ec112adf5ed88177175
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              installer.msi

                              • Path C:\Users\Admin\AppData\Local\Temp\RUT_{585B8D4D-8E53-4AA2-991C-A41D6496EF58}\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 24.1MB
                              • SHA256 5a1ac580a552eaa67d5c11b32ff2206522284c12187be4f3285580de09f22fbb
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              {43e4c3d2-2562-4f78-8b0d-2ab064060175}_OnDiskSnapshotProp

                              • Path \??\Volume{20c84cf9-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{43e4c3d2-2562-4f78-8b0d-2ab064060175}_OnDiskSnapshotProp
                              • Size 6KB
                              • SHA256 c46c119f449dd1520e3621acfd6dbd30d6cce0e8d6202e25fa95629f5eb4c1c2
                              • MD5 SHA1 SHA512 SSDEEP TLSH

                              memory/740-164-0x000000006D280000-0x000000006D9B6000-memory.dmp

                              memory/740-163-0x0000000000AD0000-0x000000000210C000-memory.dmp

                              memory/1336-151-0x000000006D280000-0x000000006D9B6000-memory.dmp

                              memory/1336-150-0x0000000000AD0000-0x000000000210C000-memory.dmp

                              memory/1348-144-0x00000000005B0000-0x00000000015EE000-memory.dmp

                              memory/1348-145-0x000000006D280000-0x000000006D9B6000-memory.dmp

                              memory/3560-171-0x000000006D280000-0x000000006D9B6000-memory.dmp

                              memory/3560-170-0x0000000000AD0000-0x000000000210C000-memory.dmp

                              memory/3988-32-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/3988-101-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/3988-5-0x0000000004FC0000-0x0000000004FC1000-memory.dmp

                              memory/3988-43-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/3988-39-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/3988-36-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/3988-35-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/3988-11-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/3988-6-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/3988-17-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/3988-0-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/3988-153-0x0000000000710000-0x00000000048D0000-memory.dmp

                              memory/4028-195-0x000000006D280000-0x000000006D9B6000-memory.dmp

                              memory/4028-194-0x0000000000AD0000-0x000000000210C000-memory.dmp

                              memory/4404-172-0x0000000000AD0000-0x000000000210C000-memory.dmp

                              memory/4404-173-0x000000006D280000-0x000000006D9B6000-memory.dmp