AtBroker.exe

  • File Path: C:\Windows\SysWOW64\AtBroker.exe
  • Description: Windows Assistive Technology Manager

Hashes

Type Hash
MD5 D5B61959A509BDA85300781F5A829610
SHA1 FC729FD404040DF6A5A3CEEDA355A53B77B43D85
SHA256 E54BCE96572F17B4DAD28689A5C4FCB55042830BF167FFA91005B0748D11C0B5
SHA384 F219C0F9551BBC212C8F874D5B9F8F0B8E2805D17D38F07F2C1B64F597812DF4061F2C990B469D9B5A67395C7A027BA0
SHA512 322DA19B91BC1A9E00CE47AE7625BF109C96BD5AFCF819C32C277E9C3099465B5BF780F5DB0299AF6FD87E4FBA0380D7193DBA72C4C6ECBA21DEA7C91A1A0C5F
SSDEEP 1536:EMH9XIoZOzDT3tAc3KT8HCz25SSLnKLzB:79izb6AfSSLnKLzB
IMP 8345A2F978F5669C81FFF2049DC536DA
PESHA1 FC14E9569544672C600B04A1942138B59A9E519F
PE256 9022822AE0F6FE02899C47BE93480F32B18557140C6EAF2162E1F943E909C4A8

Runtime Data

Loaded Modules:

Path
C:\Windows\SYSTEM32\ntdll.dll
C:\Windows\System32\wow64.dll
C:\Windows\System32\wow64cpu.dll
C:\Windows\System32\wow64win.dll
C:\Windows\SysWOW64\AtBroker.exe

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: 32-bit

File Scan

  • VirusTotal Detections: 0/73
  • VirusTotal Link: https://www.virustotal.com/gui/file/e54bce96572f17b4dad28689a5c4fcb55042830bf167ffa91005b0748d11c0b5/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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