Analysis

  • max time kernel
    149s
  • max time network
    142s
  • platform
    windows11-21h2_x64
  • resource
    win11-20251223-en
  • resource tags

    arch:x64arch:x86image:win11-20251223-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    26/12/2025, 16:03

General

  • Target
    adobe_update2415.msi
  • Size 11.6MB
  • Sample251226-thg5msdr9x
  • SHA256 527a521f0cca55ce3bed8b03b9b0917d0929682a0bbd55c15c4e2e449121c644
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Sets service image path in registry 2 TTPs 1 IoCs
  • ConnectWise ScreenConnect remote access tool

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

  • Badlisted process makes network request 2 IoCs

    Network request originating from process or tool commonly abused by malware.

  • 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
  • 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.

  • Drops file in Program Files directory 17 IoCs
  • Drops file in Windows directory 17 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 22 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 7 IoCs
  • Suspicious use of SendNotifyMessage 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:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\adobe_update2415.msi
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:4660
  • 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:4436
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 46A7F5888FBC69126A11496B6A39EF2C C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1064
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSIB229.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240628468 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:964
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:4344
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding EEE304AE474504FBEA5D088108F9BF6F
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:876
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 916717C3D5B4536BF4912896EE1DC81D E Global\MSI0000
        2⤵
        • Drops file in Windows directory
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1760
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3120
    • C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-y4znuz-relay.screenconnect.com&p=443&s=37df78fc-2a47-4d0d-931e-0982437127f7&k=BgIAAACkAABSU0ExAAgAAAEAAQB5vW6zuSlXEkfKpjhJKwyzr8rwCgB7AgzlPwa1VyzFYIf%2bCHPbmssb8%2fYr%2f4jd0eFMCillEHFYuhsPo1DEABzpVnHx%2fAo11rOU6oOmPf9vZAvgj6LH3QYtY9zmO%2fQevh7xX7RfWxHq%2bUpd4ZbivQLy80mZB1hsrpWxNNZqyOpJ90tw47N%2bvH9HPC2d%2fuNURU%2fw90wCVYWsVZXoCHtfNd8tQuwwHJSZBvcIlUrKWh6g9RnTrCM1qgEFASkY9ihDYePpLpJVaZrCL17y2iIlhDfkoF5NjJ%2febA7rKgJOZIrepTbekxBP0Ez36%2b7byrxlk%2bNEmKBif1ezPCcms1yTVIX6&c=22.12&c=&c=&c=&c=&c=&c=&c="
      1⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5672
      • C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.WindowsClient.exe" "RunRole" "71f8016f-b2d5-4bbc-9c42-9f670cc7632e" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:4760
      • C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.WindowsClient.exe" "RunRole" "a84f0c44-523e-46c1-83e6-8f27e3cd893a" "System"
        2⤵
        • Drops file in System32 directory
        • Executes dropped EXE
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:3152

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e57e0ac.rbs

          • Path C:\Config.Msi\e57e0ac.rbs
          • Size 214KB
          • SHA256 9b3af7dc0235af64d057b0f52177b89ebf475106b6d4fff5c5e01b05cf2fe6bb
          • MD5 SHA1 SHA512 SSDEEP

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\Client.en-US.resources
          • Size 64KB
          • SHA256 efdb0b4fcc38b52cbf72336bd107a814db8454003f3495de21e2026a148823ea
          • MD5 SHA1 SHA512 SSDEEP

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\Client.resources
          • Size 6KB
          • SHA256 bd34378ad99f7609fa0c7c8edde6337c738a61d288863015629329806a1cc728
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.Client.dll
          • Size 399KB
          • SHA256 dbaffdb4d49e5dba309f54b1fc110c236042ac82ccde029b2917e189edaf84d3
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.ClientService.dll
          • Size 78KB
          • SHA256 c8102fc3bda354653fc1c80b500de20d1a6bb274826334f76817f595434d2f0d
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 a33c975b07fc9db4713b6584965dd88b143d61b99c4d699dd326374b82dcd271
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.Core.dll
          • Size 553KB
          • SHA256 a98c8a07c4b819afb60d4372b2b8428d08cdd93571acb02750c8a17287ca613b
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 416a10eb49239bc3aa1b32acfa31bb206a662ab9969043a7f5fe9d6455ebc07a
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.WindowsClient.exe
          • Size 604KB
          • SHA256 a5c8ede4d24165797dcfbabbb85f62c44a79b058381e68249bf418a01fc67a1d
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 838KB
          • SHA256 7a94f9bc46ebc6285b6a9d2ee989357705707c7e03831ce22e6fae7d8d7b471c
          • MD5 SHA1 SHA512 SSDEEP

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\app.config
          • Size 484B
          • SHA256 39f14b1ab613aff74cacb3fa67196acf43ce956650c7615a1f8229e78cbe6905
          • MD5 SHA1 SHA512

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (4b64d5fa55f22fa9)\system.config
          • Size 968B
          • SHA256 00c06ee61575c56a79fa26c2eb8b3d453caa97e9d912921cb777124479061089
          • MD5 SHA1 SHA512

          8EC9B1D0ABBD7F98B401D425828828CE_AE4B983DE066DC93BB134616BF886138

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_AE4B983DE066DC93BB134616BF886138
          • Size 727B
          • SHA256 939e67d85624c5fac80fae2ffc07769a9e3bdb0d62a659c7160ea1b2498de688
          • MD5 SHA1 SHA512

          8EC9B1D0ABBD7F98B401D425828828CE_AE4B983DE066DC93BB134616BF886138

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_AE4B983DE066DC93BB134616BF886138
          • Size 408B
          • SHA256 1c911677dcafedf46884a7d787c9cc9e152811102dad53492e3417b6ba88e303
          • MD5 SHA1 SHA512

          MSIB229.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSIB229.tmp
          • Size 1.1MB
          • SHA256 80c78c9e4eca39bdefdc9d47b9a8b49dfcc3fe1c0f135338584c7e83702d539a
          • MD5 SHA1 SHA512 SSDEEP

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSIB229.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSIB229.tmp-\ScreenConnect.Core.dll
          • Size 543KB
          • SHA256 553ace16fbc4f84d8c66ca9a56797fffd527e61215aae4c09d79a55b7653a774
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSIB229.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 7071c7fa49e4b177126d58835d7df40ec0a18424d5c9110242d612fefb1974df
          • MD5 SHA1 SHA512 SSDEEP

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSIB229.tmp-\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 d7610baba5b37a3c52bc19aae6440e7631d1184a3934ebe64f836716b427490d
          • MD5 SHA1 SHA512 SSDEEP

          MSIE2DF.tmp

          • Path C:\Windows\Installer\MSIE2DF.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP

          e57e0ab.msi

          • Path C:\Windows\Installer\e57e0ab.msi
          • Size 11.6MB
          • SHA256 527a521f0cca55ce3bed8b03b9b0917d0929682a0bbd55c15c4e2e449121c644
          • MD5 SHA1 SHA512 SSDEEP

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.6MB
          • SHA256 d9347e6f4455c5346e9ec4e92777b4270eaa139e3e48a31f863662ebd20f9751
          • MD5 SHA1 SHA512 SSDEEP

          {de3854e8-5743-46ca-9ccd-93aaaaf4c5f8}_OnDiskSnapshotProp

          • Path \??\Volume{a5eda685-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{de3854e8-5743-46ca-9ccd-93aaaaf4c5f8}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 ba6e0b049cbe8482ee639577c18e9c3271aec8514ff6e510df891849fc921bcf
          • MD5 SHA1 SHA512 SSDEEP

          memory/964-27-0x00000000053E0000-0x00000000053EA000-memory.dmp

          memory/964-23-0x00000000053B0000-0x00000000053DE000-memory.dmp

          memory/964-31-0x0000000005480000-0x000000000550E000-memory.dmp

          memory/964-35-0x00000000056C0000-0x000000000586E000-memory.dmp

          memory/964-36-0x0000000005E20000-0x00000000063C6000-memory.dmp

          memory/3152-131-0x00000000026B0000-0x00000000026F1000-memory.dmp

          memory/4760-123-0x000000001D160000-0x000000001D1EE000-memory.dmp

          memory/4760-126-0x000000001D3A0000-0x000000001D54E000-memory.dmp

          memory/4760-128-0x00000000013F0000-0x0000000001408000-memory.dmp

          memory/4760-129-0x0000000002E40000-0x0000000002E58000-memory.dmp

          memory/4760-127-0x000000001E360000-0x000000001E4E8000-memory.dmp

          memory/4760-121-0x0000000000B40000-0x0000000000BDA000-memory.dmp

          memory/4760-122-0x000000001CDF0000-0x000000001CE58000-memory.dmp

          memory/5672-107-0x00000000046F0000-0x00000000047C5000-memory.dmp

          memory/5672-96-0x0000000004170000-0x00000000041C0000-memory.dmp

          memory/5672-81-0x0000000003DE0000-0x0000000003DF8000-memory.dmp

          memory/5672-105-0x00000000041C0000-0x0000000004201000-memory.dmp

          memory/5672-103-0x0000000004500000-0x0000000004592000-memory.dmp

          memory/5672-91-0x0000000004240000-0x00000000043EE000-memory.dmp

          memory/5672-87-0x0000000004000000-0x000000000408E000-memory.dmp

          memory/5672-100-0x00000000043F0000-0x0000000004458000-memory.dmp