Analysis

  • user interaction
    yes
  • max time kernel
    298s
  • max time network
    284s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    26/08/2026, 03:30

General

  • Target
    ScreenConnect.ClientSetup.msi
  • Size 9.8MB
  • Sample260826-d2wt5sgk8x
  • SHA256 3b3cd62db59ac6027b3f173371752731b8015fc1d0a6c9661421aa0f26db3611
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 7 IoCs

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

  • Sets service image path in registry 3 TTPs 1 IoCs

    This determines the executable launched when a service starts. It can be used to establish persistence.

  • ConnectWise ScreenConnect remote access tool

    ConnectWise ScreenConnect is a remote desktop tool that can be used as a backdoor.

  • Event Triggered Execution: Component Object Model Hijacking 1 TTPs

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 42 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Boot or Logon Autostart Execution: Authentication Package 1 TTPs 1 IoCs

    Suspicious Windows Authentication Registry Modification.

  • Drops file in System32 directory 10 IoCs
  • Drops file in Program Files directory 16 IoCs
  • Drops file in Windows directory 13 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 7 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.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies data under HKEY_USERS 13 IoCs
  • Modifies registry class 37 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 7 IoCs
  • Suspicious use of SendNotifyMessage 5 IoCs
  • Suspicious use of WriteProcessMemory 9 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\ScreenConnect.ClientSetup.msi
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:4576
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Boot or Logon Autostart Execution: Authentication Package
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3972
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 68FECE3AF3F9C13EABEAC0E7B09E75AF C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2628
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI6915.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240675328 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3856
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI6F60.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240676750 10 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiMotw
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1796
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI74EF.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240678156 17 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiFileName
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3828
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3508
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding CD8B1943FC6EC4D69D1A14C220622867
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1044
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding BB0EEA2B70AA1582692110C8162B25B3 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:2604
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3652
    • C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-xnkclr-relay.screenconnect.com&p=443&s=60788cd3-7141-4f97-a3b3-1dceb65fa3d7&k=BgIAAACkAABSU0ExAAgAAAEAAQCtHh1gcO4zje3zwvtcouMJWaKbF4zoeP9p92R%2bjKjcd6bgiQ6hAxpeQ0oc64xEfw%2fw9oinzLXzDNZ1m%2fo8d8MQCpwOtOllyWCg4CZKkFVBIm8fU5Bf4RAZnKsM5PYcVB7jfDATDjdIIbWrmFXcHVuJeQ3srB6HeZ5MPpthotIjjIKnpunfwASSFNzNjmLvFnAamGqTYpb75SdMjnH1MJhfGCOnt%2ff8TA%2fyH3Sgka5QvoT%2bUl%2fnw4eQ3LYA4Nixkr6%2bRe6RJNUKE4b%2fhBAy7enKMtf8h%2bCet7OP4dgq1842OATetTsQiNFPfRVlm4cCP8g5p6zVyVAq2jsNG2h9I7nY"
      1⤵
      • Sets service image path in registry
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3048
      • C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.WindowsClient.exe" "RunRole" "2acd53bf-ffa5-4bb8-9df1-4be306acd83f" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2384
      • C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.WindowsClient.exe" "RunRole" "a3e19b90-5eb3-4a21-ac89-9c0eff75f94a" "System"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:1424

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e58b070.rbs

          • Path C:\Config.Msi\e58b070.rbs
          • Size 214KB
          • SHA256 309ea0d7678554993fd7a8d534543090169d614f8c11d2b8ab6135004977be39
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\Client.en-US.resources
          • Size 64KB
          • SHA256 a90983b3d26f9e6bb472663b84d13254349f62b0ad4c667fd76b3edd270240b2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\Client.resources
          • Size 6KB
          • SHA256 bd34378ad99f7609fa0c7c8edde6337c738a61d288863015629329806a1cc728
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.Client.dll
          • Size 412KB
          • SHA256 8e5531c2b302f9c95ed32ac7481d3535b6d51147257d317686c07ea1a9cb8362
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.ClientService.dll
          • Size 92KB
          • SHA256 ed32fe0d924959020cbef0534a7ba612e94263ccc74837475f3b5a6a726acad0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 16b4c273a25526e7262716ebe9d46480962347191a034595f18be740d9ce1e17
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.Core.dll
          • Size 579KB
          • SHA256 f64cb7ab5f105c22348a22e02dd506ff45456884639fee0f322862112860af24
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 c50d6e8d93ed197dd0cfb647743b42a2a6a9289f6db04092f56cefd6d569663e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.WindowsClient.exe
          • Size 678KB
          • SHA256 2ad8f126461607aad3fa31a41f1f39bc74f471fd84191b43e205610db2c4cf09
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 4868b7997b9b4260be2df752a81a750388243cdbea37e4d82a9e0101cd29d0c7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (1a74f87667273459)\system.config
          • Size 964B
          • SHA256 ebce06438e21ab33f424481baea57b45fea2112f0615ba12e861cc4c00b44ea7
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 727B
          • SHA256 5501530edcdd9a852984d265adc7ad6179b541023066cb2bf93a312625062b15
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 727B
          • SHA256 4f93ba06bdda550144e5cc6f4f59e29a48a01f8c2fb548eba7ab28da7fb2500a
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 404B
          • SHA256 64b9431dce0f64d7598317594ce8e714ab74fb1332bcaadf8e891a281a165983
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 412B
          • SHA256 8261d907f4b3a2dcdbc1a2010a2f70bee703c84d240de8b739a9e3f4ae848a6c
          • MD5 SHA1 SHA512 TLSH

          rundll32.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\rundll32.exe.log
          • Size 746B
          • SHA256 707c0e90ab433305fb10151c93aed7664319ba55ec59b7304d38481af4f5a4a2
          • MD5 SHA1 SHA512 TLSH

          MSI6915.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6915.tmp
          • Size 1.1MB
          • SHA256 de867af8055f81b7691f12175deb4c4e7f3bf97130e51761ed02182b0496e16f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6915.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6915.tmp-\ScreenConnect.Core.dll
          • Size 569KB
          • SHA256 e92d94613443befebb55b08f80d10a2fdbfc58233e8dc95cfb4466fde12964f7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6915.tmp-\ScreenConnect.InstallerActions.dll
          • Size 24KB
          • SHA256 d827d3575ca29f8a40ea5379c7df2b315fc72cbd93451de94e199740594b51bb
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6915.tmp-\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 320b89343e896a8d2ebf537861d800a9aca88245cc3b5616bb5bea5cc6797fbb
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CustomAction.config

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6F60.tmp-\CustomAction.config
          • Size 234B
          • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6F60.tmp-\ScreenConnect.WindowsInstaller.dll
          • Size 137KB
          • SHA256 dbf379b93127345a83282380aee634d0b70ec731acfeea76617c76e76fdc764f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIB2F1.tmp

          • Path C:\Windows\Installer\MSIB2F1.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e58b06f.msi

          • Path C:\Windows\Installer\e58b06f.msi
          • Size 9.8MB
          • SHA256 3b3cd62db59ac6027b3f173371752731b8015fc1d0a6c9661421aa0f26db3611
          • MD5 SHA1 SHA512 SSDEEP TLSH

          fp0ww22k.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (1a74f87667273459)\fp0ww22k.newcfg
          • Size 683B
          • SHA256 a834aaf0b4b7cf34ff9081f2b6a9f77b92528dc1aab63284a2e4f273cc6ebfb8
          • MD5 SHA1 SHA512 TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (1a74f87667273459)\user.config
          • Size 520B
          • SHA256 b6b88012b4c349c61381dd796eb83c6a044638025f3934026172384ba0ebc564
          • MD5 SHA1 SHA512 TLSH

          yg4nhghb.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (1a74f87667273459)\yg4nhghb.newcfg
          • Size 881B
          • SHA256 cc49abb69d436e710e8eb9c6d2fb0802f461b4fe9b07718e5ad3f85107a1b18b
          • MD5 SHA1 SHA512 TLSH

          memory/1796-74-0x0000000005CB0000-0x0000000005CD8000-memory.dmp

          memory/2384-226-0x000000001B440000-0x000000001B4AC000-memory.dmp

          memory/2384-231-0x000000001BE40000-0x000000001BFC8000-memory.dmp

          memory/2384-230-0x00000000029B0000-0x00000000029CA000-memory.dmp

          memory/2384-229-0x000000001BB00000-0x000000001BCB0000-memory.dmp

          memory/2384-228-0x000000001B8B0000-0x000000001B944000-memory.dmp

          memory/2384-225-0x00000000008A0000-0x000000000094E000-memory.dmp

          memory/3048-197-0x0000000003F20000-0x0000000003F61000-memory.dmp

          memory/3048-161-0x0000000003BA0000-0x0000000003BBA000-memory.dmp

          memory/3048-167-0x0000000003DE0000-0x0000000003E74000-memory.dmp

          memory/3048-199-0x0000000004460000-0x0000000004536000-memory.dmp

          memory/3048-173-0x0000000003ED0000-0x0000000003F20000-memory.dmp

          memory/3048-171-0x0000000004030000-0x00000000041E0000-memory.dmp

          memory/3048-195-0x0000000004280000-0x0000000004312000-memory.dmp

          memory/3048-192-0x0000000003F90000-0x0000000003FFC000-memory.dmp

          memory/3856-42-0x00000000060D0000-0x0000000006676000-memory.dmp

          memory/3856-41-0x0000000005970000-0x0000000005B20000-memory.dmp

          memory/3856-37-0x0000000005720000-0x00000000057B4000-memory.dmp

          memory/3856-33-0x00000000032F0000-0x00000000032FC000-memory.dmp

          memory/3856-29-0x00000000032B0000-0x00000000032DE000-memory.dmp