AtBroker.exe

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

Hashes

Type Hash
MD5 05D85968A03C00BB7CC2152C40D5550B
SHA1 B70759D4F2A7E50852D93FA7685C1A3342972D7B
SHA256 020736CA188D1C9E9B4EEFC274951550AA3C926918EF1038566D5EB4C6649DC8
SHA384 5A349A224BC737641EF1973300E8CF73CCB9CAE79CA445008DD554AF91E6DB39C6CEBBEF1DC26B935AC5462388F36C7F
SHA512 B414B78EC6568EF7E82C0CA7667BC41B94612F46A92A82D91159A11CE40ADBA1514CD71EECD9A4A11D8339732196807673C09A658D6A70E14274DE93C0F113D3
SSDEEP 1536:ZxuqWvwbAQtp0cqwtsYIB1ks6N7Hk1pJHfw1DZZMx3WdkCEV941TA9/qyEu:WqSKpfqwtsYO1ks6pkwH/BA9wk4yE
IMP AD6697DB3D380D03EACBB4BE152A7C5A
PESHA1 891E258BD997DC73F6D54776ECD8F8ED16ED4671
PE256 9DD0D1127FC67136EA2C8F81CF9AD4E989DD6B66D0CE0B10A5D08A1777613593

Runtime Data

Loaded Modules:

Path
C:\WINDOWS\SYSTEM32\ntdll.dll
C:\WINDOWS\System32\wow64.dll
C:\WINDOWS\System32\wow64base.dll
C:\WINDOWS\System32\wow64con.dll
C:\WINDOWS\System32\wow64cpu.dll
C:\WINDOWS\System32\wow64win.dll
C:\WINDOWS\SysWOW64\AtBroker.exe

Signature

  • Status: Signature verified.
  • Serial: 33000002ED2C45E4C145CF48440000000002ED
  • Thumbprint: 312860D2047EB81F8F58C29FF19ECDB4C634CF6A
  • 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: 10.0.22000.1 (WinBuild.160101.0800)
  • Product Version: 10.0.22000.1
  • 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/020736ca188d1c9e9b4eefc274951550aa3c926918ef1038566d5eb4c6649dc8/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

MIT License. Copyright (c) 2020-2021 Strontic.