Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    05/09/2026, 00:18

General

  • Target
    ScreenConnect.ClientSetup.exe
  • Size 12.2MB
  • Sample260905-althastakd
  • SHA256 533cea50773142b341575b144b6d534550d8901dd8d5afbf10fb1b155f60f8b9
  • 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.

  • 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops file in System32 directory 10 IoCs
  • 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.

  • Drops file in Program Files directory 16 IoCs
  • Drops file in Windows directory 13 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 42 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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.

  • 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 10 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\ScreenConnect.ClientSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\ScreenConnect.ClientSetup.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1812
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\ScreenConnect\26.5.3.9691\4b7d53e4f15d9ed0\ScreenConnect.ClientSetup.msi" SC_EXE_PATH="C:\Users\Admin\AppData\Local\Temp\ScreenConnect.ClientSetup.exe"
      2⤵
      • Badlisted process makes network request
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:4912
  • 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:4060
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 95BCC4D46C9F723192677B1AB576BADA C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1496
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSID84A.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240703812 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:116
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSIDC91.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240704656 10 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiMotw
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:2540
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSIA2DF.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240755453 17 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiFileName
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3128
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3196
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 9DD2BEFB80736DF30E82C8BB34A0AA5B
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:2820
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 52E606079285F5C44F633422EE250F4B E Global\MSI0000
        2⤵
        • Drops file in Windows directory
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1208
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3560
    • C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-sun0gm-relay.screenconnect.com&p=443&s=ca89d2ff-65ce-4960-a747-8636041dcf51&k=BgIAAACkAABSU0ExAAgAAAEAAQDRaJw4Xje019sN%2bbxfyxjyysv97uMGkzMfhcax81HduscnrSu%2btXi20AkZAErHI2PEcW50m5XndFZ5NuFGRIq21YQcDNDucstFJTaoUH9fM6h6pX1ge7Fte658MIW1MV0n5rjHsiDfxeCKEEwen%2b8yoy9xmX3swSdRSQZH3sfyCrVOJivbyIxMPvobqGLToIP6Sflbg4hDnOt4qjn4FrtslGgyC5A6dLXYpVAXFOuhQLgtcEg%2bu8i672vV3XtCp3k7hGI5OyCj%2fXCry8cssAautvlgScLLH9phCrF9i9oKiuSfYnB4IruU%2bSSzIPgqunNQs1Uy2T%2f1X%2bkTWoGYKZHQ"
      1⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1720
      • C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.WindowsClient.exe" "RunRole" "5a2a7915-d6bc-4062-920f-7bef4af2e8d7" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:1100
      • C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.WindowsClient.exe" "RunRole" "5de20510-c637-4138-b5c6-5084b3d974a6" "System"
        2⤵
        • Drops file in System32 directory
        • Executes dropped EXE
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:2548

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e59e110.rbs

          • Path C:\Config.Msi\e59e110.rbs
          • Size 214KB
          • SHA256 a9f8a089fab768945c0d8c2c8494fe4aa766592c8f0c4743a7f9460d960d5e98
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\Client.en-US.resources
          • Size 64KB
          • SHA256 a90983b3d26f9e6bb472663b84d13254349f62b0ad4c667fd76b3edd270240b2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.Client.dll
          • Size 412KB
          • SHA256 8e5531c2b302f9c95ed32ac7481d3535b6d51147257d317686c07ea1a9cb8362
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.ClientService.dll
          • Size 92KB
          • SHA256 ed32fe0d924959020cbef0534a7ba612e94263ccc74837475f3b5a6a726acad0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 16b4c273a25526e7262716ebe9d46480962347191a034595f18be740d9ce1e17
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.Core.dll
          • Size 579KB
          • SHA256 f64cb7ab5f105c22348a22e02dd506ff45456884639fee0f322862112860af24
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 c50d6e8d93ed197dd0cfb647743b42a2a6a9289f6db04092f56cefd6d569663e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 4868b7997b9b4260be2df752a81a750388243cdbea37e4d82a9e0101cd29d0c7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (4b7d53e4f15d9ed0)\system.config
          • Size 960B
          • SHA256 07dab7542d9434ff85bdf5b23f34e7ca0add544c40a62b8629e10fd0d8dc61a4
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 727B
          • SHA256 a630a511b96332d4c92df1d24c8a0aa5b4fc8689de701fbed718c12b93f51b45
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 727B
          • SHA256 9c8764a46fb77bb3411831de70cbc600881ecb394b2beb40fd5461af08589ff3
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 404B
          • SHA256 337ff813f3a11e00f157a631ad36be86cd98d5371333cc180087edb049190bdc
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 412B
          • SHA256 8867c4863fba69d6a69cc37cb7ba78fbb61aaa341655f20e0270abbe3418d598
          • 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 ddebb6b1094dbef9e96754a74ebd4761d857864c9bd0b5f20a97259a6d7c8fe0
          • MD5 SHA1 SHA512 TLSH

          MSID84A.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSID84A.tmp
          • Size 1.1MB
          • SHA256 de867af8055f81b7691f12175deb4c4e7f3bf97130e51761ed02182b0496e16f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSID84A.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSID84A.tmp-\ScreenConnect.Core.dll
          • Size 569KB
          • SHA256 e92d94613443befebb55b08f80d10a2fdbfc58233e8dc95cfb4466fde12964f7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSID84A.tmp-\ScreenConnect.InstallerActions.dll
          • Size 24KB
          • SHA256 d827d3575ca29f8a40ea5379c7df2b315fc72cbd93451de94e199740594b51bb
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSID84A.tmp-\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 320b89343e896a8d2ebf537861d800a9aca88245cc3b5616bb5bea5cc6797fbb
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CustomAction.config

          • Path C:\Users\Admin\AppData\Local\Temp\MSIDC91.tmp-\CustomAction.config
          • Size 234B
          • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSIDC91.tmp-\ScreenConnect.WindowsInstaller.dll
          • Size 137KB
          • SHA256 dbf379b93127345a83282380aee634d0b70ec731acfeea76617c76e76fdc764f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientSetup.msi

          • Path C:\Users\Admin\AppData\Local\Temp\ScreenConnect\26.5.3.9691\4b7d53e4f15d9ed0\ScreenConnect.ClientSetup.msi
          • Size 9.8MB
          • SHA256 7732509a56a19fcc634f024497cc90da5660c24609d67732caa7aca909abcb3d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIE324.tmp

          • Path C:\Windows\Installer\MSIE324.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          uepeslwa.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (4b7d53e4f15d9ed0)\uepeslwa.newcfg
          • Size 683B
          • SHA256 c86cf51fc6d24a9c93d5b2c3cd28b00f54d50c185933ff630c44cf2161ebad06
          • MD5 SHA1 SHA512 TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (4b7d53e4f15d9ed0)\user.config
          • Size 520B
          • SHA256 e52440d2bce7c9133b18ab6a421dd819d73f84c7807f95b6c60c92a796e72705
          • MD5 SHA1 SHA512 TLSH

          yeaiwmyn.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (4b7d53e4f15d9ed0)\yeaiwmyn.newcfg
          • Size 882B
          • SHA256 a942483915b5c1a29d78761e39117d564604fc3bbc9b3549d0cd727b46f419a1
          • MD5 SHA1 SHA512 TLSH

          memory/116-43-0x00000000030D0000-0x00000000030DC000-memory.dmp

          memory/116-39-0x0000000003090000-0x00000000030BE000-memory.dmp

          memory/116-51-0x0000000005810000-0x00000000059C0000-memory.dmp

          memory/116-47-0x00000000055C0000-0x0000000005654000-memory.dmp

          memory/1100-217-0x000000001B9B0000-0x000000001BA44000-memory.dmp

          memory/1100-230-0x000000001BC00000-0x000000001BDB0000-memory.dmp

          memory/1100-215-0x0000000000A00000-0x0000000000AAE000-memory.dmp

          memory/1100-216-0x0000000002B60000-0x0000000002BCC000-memory.dmp

          memory/1100-233-0x000000001CFF0000-0x000000001D176000-memory.dmp

          memory/1100-232-0x0000000002B10000-0x0000000002B2A000-memory.dmp

          memory/1720-188-0x0000000003990000-0x00000000039E0000-memory.dmp

          memory/1720-212-0x0000000003F20000-0x0000000003FF6000-memory.dmp

          memory/1720-165-0x0000000003750000-0x000000000376A000-memory.dmp

          memory/1720-207-0x0000000003A50000-0x0000000003ABC000-memory.dmp

          memory/1720-171-0x00000000038A0000-0x0000000003934000-memory.dmp

          memory/1720-208-0x0000000003D40000-0x0000000003DD2000-memory.dmp

          memory/1720-175-0x0000000003AF0000-0x0000000003CA0000-memory.dmp

          memory/1720-210-0x0000000003940000-0x0000000003981000-memory.dmp

          memory/1812-2-0x0000000005C50000-0x0000000005C60000-memory.dmp

          memory/1812-5-0x0000000005C10000-0x0000000005C38000-memory.dmp

          memory/1812-1-0x00000000035D0000-0x00000000035D8000-memory.dmp

          memory/1812-3-0x0000000003640000-0x000000000364C000-memory.dmp

          memory/1812-4-0x0000000005C60000-0x0000000005CF4000-memory.dmp

          memory/1812-7-0x0000000006450000-0x00000000069F4000-memory.dmp

          memory/1812-8-0x0000000005C50000-0x0000000005C60000-memory.dmp

          memory/1812-6-0x0000000005CF0000-0x0000000005EA0000-memory.dmp

          memory/1812-0-0x0000000005C50000-0x0000000005C60000-memory.dmp

          memory/2540-83-0x00000000047F0000-0x0000000004818000-memory.dmp