AtBroker.exe

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

Hashes

Type Hash
MD5 30076E434A015BDF4C136E09351882CC
SHA1 584C958A35E23083A0861421357405AFD26D9A0C
SHA256 AE7B1E298A6E38F0A3428151BFC5565EDE50A8D98DAFAA147B13CF89C61F2DDD
SHA384 8727E2DF9EF16342B3475F873863523DE9D84502771A85972399C4F5EB14BEB0DD2AA113FA0990FAA2BF754815807635
SHA512 675E310C2455ACF9220735F34FA527AFE87DAC691E89CC0EDC3C4659147E9FD223F96B7A3BEEA532047AA0EBC58880A7010343019A50AA73CE69A038E3592024
SSDEEP 1536:To4xehkWhYULcid2bpS8r0sMCl9Mx07zLrwkkqz3q/Troh7YTVZPyOh+id+Uk9:M8vQc79vr0wPLrwkkCq/nEYTVZPy9id2
IMP 468490D98938AAE93ECC62C54A775DC2
PESHA1 2A3F4DFF927E9626ED7DEA0528815CDCB729163F
PE256 3458DB0C05AFF9F18439E83F3E47C7A075D925D71209458F16906C1BE429089E

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: 33000002EC6579AD1E670890130000000002EC
  • Thumbprint: F7C2F2C96A328C13CDA8CDB57B715BDEA2CBD1D9
  • 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: 10.0.19041.1023 (WinBuild.160101.0800)
  • Product Version: 10.0.19041.1023
  • Language: English (United States)
  • Legal Copyright: Microsoft Corporation. All rights reserved.
  • Machine Type: 64-bit

File Scan

  • VirusTotal Detections: 0/72
  • VirusTotal Link: https://www.virustotal.com/gui/file/ae7b1e298a6e38f0a3428151bfc5565ede50a8d98dafaa147b13cf89c61f2ddd/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 - 'atbroker.exe' DRL 1.0
sigma win_susp_atbroker.yml title: Suspicious Atbroker Execution DRL 1.0
sigma win_susp_atbroker.yml description: Atbroker executing non-deafualt Assistive Technology applications DRL 1.0
sigma win_susp_atbroker.yml - https://lolbas-project.github.io/lolbas/Binaries/Atbroker/ DRL 1.0
sigma win_susp_atbroker.yml Image\|endswith: 'AtBroker.exe' DRL 1.0
sigma sysmon_susp_atbroker_change.yml title: Atbroker Registry Change DRL 1.0
sigma sysmon_susp_atbroker_change.yml - https://github.com/LOLBAS-Project/LOLBAS/blob/master/yml/OSBinaries/Atbroker.yml 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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