Tag Archives: antivirus

Sophos antivirus notes

Generic checks

ps aux |grep sav (check process)

/opt/sophos-av/bin/savdstatus --version (version, last update, thread data)
/opt/sophos-av/bin/savconfig -v (info about exclusions, where the Datacentre is that hosts that Sophos device, named scans etc )
/opt/sophos-av/bin/savconfig get TalpaOperations (check disabled mode)

cat /proc/sys/talpa/intercept-filters/VettingController/ops (check all modes)
/opt/sophos-av/bin/savconfig set TalpaOperations -- -open (set mode to disabled for open/read)
/opt/sophos-av/bin/savconfig get TalpaOperations

cat /proc/sys/talpa/intercept-filters/VettingController/ops

/opt/sophos-av/bin/savconfig query NamedScans (Check Scheduled Scans)
/opt/sophos-av/bin/savconfig query NamedScans SEC:FullSystemScan (Check Scheduled Scans with argument)
/opt/sophos-av/bin/savconfig add ExcludeFilePaths /home/user1/ (ADD Exclude files' path)
/opt/sophos-av/bin/savconfig remove ExcludeFilePaths /home/user1/ (REMOVE Exclude files' path)

# Check Global exclusions 
/opt/sophos-av/bin/savconfig query ExcludeFileOnGlob && /opt/sophos-av/bin/savconfig query ExcludeFilePaths

/opt/sophos-av/bin/savdctl disable (disable on-access scanning)
/opt/sophos-av/bin/savdstatus (check)
Sophos Anti-Virus is active but on-access scanning is not running

To get ON-Access Scanning back, restart all Sophos related services:
for i in `chkconfig --list |grep sav |awk '{print $1}'`;do echo -e "\n\e[93mShow service $i restart \e[0m\n";service $i restart;done


>> Perform the scan -> this will create a log
savscan -nc -f -s --no-follow-symlinks --backtrack-protection --quarantine <path/to/scan> (manual scan)

>> Than, check the log to see what it has been found from the manual scan
/opt/sophos-av/bin/savlog --today --utc | grep detected (check threats for today -)
grep INFECTED /opt/sophos-av/log/savd.log | grep -P -o '(?<=arg>)/[^<]*(?=</arg)' | sort -u (check  all threats)
savscan --help

Example for multiple folders with final report:

(suggested to run in a screen session)

  1. Create a temporary folder:
    mkdir -p /tmp/scantmp/ > && cd $_
  2. list all directories that you want to scan (full path) into a file called list_folder.txt within the temp folder;
  3. Run the following:
    for i in `cat list_folder.txt` ; do nice / renice -n 19 savscan -nc -f -s --no-follow-symlinks --backtrack-protection --quarantine $i 2>&1 >> scan.log ; done
    /opt/sophos-av/bin/savlog --today --utc | grep "Threat detected" | awk -F" " '{print $2}' > report.txt
  4. Check report.txt