AvastBrowser.exe
Sources: 300M+ executions observed in the wild.
Summary
Avast Secure Browser, a Chromium-based web browser bundled with Avast antivirus products. Uses multi-process architecture similar to Chrome.
AvastBrowser.exe is the 123rd most commonly executed Windows program in EchoTrail's dataset, observed 169,275 times across enterprise environments. It typically runs from C:\Program Files (x86)\AVAST Software\Browser\Application and it is most often launched by AvastBrowser.exe.
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The same record for avastbrowser.exe, by REST or as an MCP tool. Free key, no card.
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Behavior
Top Paths
- C:\Program Files (x86)\AVAST Software\Browser\Application100%
Top Hashes (SHA256)
- d526ea0da78bf973d76a61a044d948a04a0e64b1f69c74f8eed64324ba08888f18.88%
- 6106b9565066e250d0f0fbe70f02318b68f1e2063c2130235003d6f0bbd6bacb12.71%
- 0bfac93d606545df7b04fc44568f96d4d81c33ad395dd05297c7f43ad539e7fe9.61%
- 8b5b51a27747dcecf899a3b0c3c5a30bc73d6cafb48e665f0b224e7dc88c63455.72%
- 50e7e3e2c004c7ee0cc3bada4d02fc7d882c3790ec529310ae3dd39a231f15295.28%
- e83475894e495aae335e0fb9f266259c71e705ca19b0c76b9f21c27a6fb2ea774.15%
- d911a5dc960fb96f5ed91d701f8f0076ec5b4fe97135776652dc845d18eeea413.89%
- 7bd94bb7e7a93c8178898bdeeb559532306e089788be3352f44190931ad4a8d93.67%
- 607a6ba85d585b98475542966198db0eb82749dbcd41a69e7846f918e99ed9383.44%
- 47bf33991c1932c88996b7f14e58a23141fd1f505bbc41779b9b19f4d8901c443.2%
Process Ancestry
Top Grandparents
- explorer.exe99.4%
- userinit.exe0.6%
Top Parents
- AvastBrowser.exe92.91%
- svchost.exe7.08%
- explorer.exe0.01%
- setup.exe<0.01%
Top Children
- AvastBrowser.exe97.66%
- cmd.exe0.58%
- chrmstp.exe0.15%
Security Analysis
What does AvastBrowser.exe normally do?
Multi-process architecture — many simultaneous instances are normal.
When is AvastBrowser.exe suspicious?
Spawning shells (cmd.exe, powershell.exe). Running from unexpected paths. DLL sideloading.
How do attackers abuse AvastBrowser.exe?
Similar to Chrome — DLL search order hijacking, drive-by downloads. Browsers spawning shells is the primary detection hypothesis.
Detection guidance
Monitor for shell spawning. DLL sideloading via application directories.
False positive notes
Multiple instances are normal. Update processes may spawn temporarily.
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