Command-Line Updates and Scans

This Article Applies to:

  • Avast Business Antivirus
  • Small Office Protection

Command Line Updater/Scanner

Below are the folder paths to the Avast command line updater/scanner, and report files.

Default .exe File location:

  • %ProgramFiles%\AVAST Software\Avast

Default Report File location:

  • %ProgramData%\AVAST Software\Avast\report

ashUpd.exe (Updates)

Update Virus Definitions Command: ashUpd.exe vps [/autoreboot] [/help]

Update Antivirus Program Command: ashUpd.exe program [/autoreboot] [/help]

ashCmd.exe (Scans)

  • (area name): area for virus testing; there can be multiple areas in your command
  • /# or --remote: remote disks
  • /* or --local: local hard drives
  • /?, /h or --help: displays a short description of all parameters
  • /@ = expect string or --task = expect string: parameter contains name of task which will be started; other parameters are ignored
  • /_ or --console: application will be ready for STDIN/STDOUT
  • /a or --testall: test of all files
  • /c or --testfull: scan entire files
  • /d or --dontpanic: do not switch to 'panic mode' when a virus is found
  • /e = expect byte or --heuristics = expect byte: set the heuristic sensitivity, where 0 is no heuristics and 100 is the maximum sensitivity
  • /f = expect string or --fileactions = expect string=[BPSW] additional configuration for actions on infected files:
    • B: allow delayed actions (after reboot) for locked files
    • P: if a file cannot be removed from an archive, try to remove its parent(s) instead
    • S: do not remove associated auto-start references when removing a file
    • W: when an infected file is found in an archive, perform the action with the whole archive, not just the file inside
  • /g = expect byte or --checkgenuine = expect byte: =[0|1] check digital signatures of infected files (and ignore genuine)
  • /i or --ignoretype: ignore virus sets
  • /j or --paging: paging the lines if program is not in STDOUT mode (parameter /_)
  • /m or --boot: test boot sectors and whole operating memory
  • /p = expect byte or --continue = expect byte: program doesn't wait for user input (/p); automatic action with infected file (/p=[01234])
    • 0: fix automatically
    • 1: delete file
    • 2: move to chest
    • 3: repair
    • 4: stop when virus is detected
  • /q or --stopclean: stop on clean files and wait for user input
  • /r = expect string or --report = expect string: =[*~][file] create report file. * includes Ok files, ~ includes skipped files
  • /s or --soundoff: no sounds
  • /t = expect string or --archivetype = expect string: =[JZIMXRSTGCBWOEQHFVKPY7D6U4123AN]; default option is /t=XSW2
  • /u = expect string or --sendmessage = expect string=(address) send message about found virus to selected address
  • /w = expect string or --exclude = expect string: =(mask) exclude specific file/folder from scanning (wildcards accepted)
  • /x = expect string or --virustypes = expect string: =[P] detect specific malware types that are not detected by default:
    • P: PUPs (potentially unwanted programs)

Example Avast Batch Script

This is just for scanning common areas for infections.

@Echo Off

CD /D "%ProgramFiles%\AVAST Software\Avast"

ashUpd VPS

ashCmd "%SystemDrive%\Users\*" "%WinDir%\*" /e=50 /f=B /m /p=0 /s /r="%ProgramData%\AVAST Software\Avast\report\DefaultScan.txt"

"%WinDir%\System32\ShutDown.exe" /r /f /t 60 /c "Restarting computer in 1 (one) minute! Please save all work immediately!"


  1. Changes directory to %ProgramFiles%\AVAST Software\Avast
  2. Checks for virus definition updates (highly recommended before starting scan)
  3. Runs a default scan (executable and documents) just on the users' profiles and Windows folders, and also scans boot sector and memory
    • Heuristic sensitivity is set at medium (normal)
    • Attempts to fix infected files automatically, including locked files after restart
    • Disables sound
    • Creates %ProgramData%\AVAST Software\Avast\report\DefaultScan.txt report file
  4. Restarts device after scan, and exits batch script

Other Articles In This Section:

Configuring Files and Programs Scanned by Antivirus

Related Articles:

Threat Detections