AtBroker.exe

  • File Path: C:\Windows\system32\AtBroker.exe
  • Description: Windows Assistive Technology Manager

Hashes

Type Hash
MD5 22FB65036D7A01D15710A14CD70A903C
SHA1 45A1BEEE176F092CDAD1384D82EFDBDD4589C41E
SHA256 4D75D895625DCF95E06DB50816CEC9EF125B25FF916AF3F9CEA68CDBD2630799
SHA384 014B98364A545972CCCD53619F5DBCB592F03DBF576BD35D0A5B7C28F37ADBD67E971A70853BCA89662471C1F57FBF59
SHA512 C501B8B473F2C5614263B5C27F5A721B070FEEF5001A4BF1E29A8ACE54FA9FDF7755A5D52066619C3BC74CD7F0484AED38A5D1513034547348E6504F71F03515
SSDEEP 1536:nXtIN3Ow1nvQUfNvOI3d3M8oth+Gms2AVC3Yfx9BiXeL5Zcz5kWXFMx:ndQJBlPdc8/AVCkx/aeL5ZY5kWX6
IMP EB4EAB2F36ED8FB4978A50489F965F43
PESHA1 A0F462A07AE194F61A2A68F1BA2F23B7EEF1D867
PE256 0BBCFC32BDF75E80F1242A1E9DEB7270023DE0108C2F7E3A5DD4BD03C342F3D4

Runtime Data

Loaded Modules:

Path
C:\Windows\System32\ADVAPI32.dll
C:\Windows\system32\AtBroker.exe
C:\Windows\System32\GDI32.dll
C:\Windows\System32\gdi32full.dll
C:\Windows\System32\KERNEL32.DLL
C:\Windows\System32\KERNELBASE.dll
C:\Windows\System32\msvcp_win.dll
C:\Windows\System32\msvcrt.dll
C:\Windows\SYSTEM32\ntdll.dll
C:\Windows\System32\RPCRT4.dll
C:\Windows\System32\sechost.dll
C:\Windows\System32\SHELL32.dll
C:\Windows\System32\SHLWAPI.dll
C:\Windows\System32\ucrtbase.dll
C:\Windows\System32\USER32.dll
C:\Windows\System32\win32u.dll

Signature

  • Status: Signature verified.
  • Serial: 3300000266BD1580EFA75CD6D3000000000266
  • Thumbprint: A4341B9FD50FB9964283220A36A1EF6F6FAA7840
  • Issuer: CN=Microsoft Windows Production PCA 2011, O=Microsoft Corporation, L=Redmond, S=Washington, C=US
  • Subject: CN=Microsoft Windows, O=Microsoft Corporation, L=Redmond, S=Washington, C=US

File Metadata

  • Original Filename: ATBroker.exe
  • Product Name: Microsoft Windows Operating System
  • Company Name: Microsoft Corporation
  • File Version: 10.0.19041.1 (WinBuild.160101.0800)
  • Product Version: 10.0.19041.1
  • Language: English (United States)
  • Legal Copyright: Microsoft Corporation. All rights reserved.
  • Machine Type: 64-bit

File Scan

  • VirusTotal Detections: 0/74
  • VirusTotal Link: https://www.virustotal.com/gui/file/4d75d895625dcf95e06db50816cec9ef125b25ff916af3f9cea68cdbd2630799/detection

Possible Misuse

The following table contains possible examples of AtBroker.exe being misused. While AtBroker.exe is not inherently malicious, its legitimate functionality can be abused for malicious purposes.

Source Source File Example License
sigma win_install_reg_debugger_backdoor.yml - '*\CurrentVersion\Image File Execution Options\atbroker.exe*' DRL 1.0
LOLBAS Atbroker.yml Name: Atbroker.exe  
LOLBAS Atbroker.yml - Command: ATBroker.exe /start malware  
LOLBAS Atbroker.yml - Path: C:\Windows\System32\Atbroker.exe  
LOLBAS Atbroker.yml - Path: C:\Windows\SysWOW64\Atbroker.exe  
LOLBAS Atbroker.yml - IOC: Unknown AT starting C:\Windows\System32\ATBroker.exe /start malware  
atomic-red-team T1546.008.md * App Switcher: C:\Windows\System32\AtBroker.exe</blockquote> MIT License. © 2018 Red Canary
atomic-red-team T1546.008.md | parent_list | Comma separated list of system binaries to which you want to attach each #{attached_process}. Default: “osk.exe” | String | osk.exe, sethc.exe, utilman.exe, magnify.exe, narrator.exe, DisplaySwitch.exe, atbroker.exe| MIT License. © 2018 Red Canary

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