On Wednesday, 11 March 2026 at 5:58 PM, Arnaud Jacques via clamav-users <[email protected]> wrote:
> Hello, > > > > Is there a Bootable ClamAV Virus Scanner USB Thumbdrive/CD/DVD for scanning > > my Windows 10/11 home desktop computer and laptops for rootkits, malware > > and spyware? > > You can use Kali > https://www.kali.org/get-kali/#kali-live > > If you do not know how to use ClamAV inside Kali, you can find video > tutorials on youtube. > > If you already know how to configure/use ClamAV, then do not forget to > use 3rd parties additional signatures to increase detection rate. > > -- > Cordialement / Best regards, > > Arnaud Jacques > Gérant de SecuriteInfo.com > > Téléphone : +33-(0)3.60.47.09.81 > E-mail : [email protected] > Site web : https://www.securiteinfo.com > Facebook : https://www.facebook.com/pages/SecuriteInfocom/132872523492286 > Twitter : @SecuriteInfoCom > Writing signatures for ClamAV antivirus since 2006 > Dear Arnaud Jacques, Thanks for the great information! I have asked ChatGPT. Below guide is generated by ChatGPT. Below is a clean, complete workflow to scan a Windows disk from Linux using the fast ClamAV daemon (clamd), including APT / nation-state malware hunting with additional signatures and YARA rules. This assumes you already booted into Kali Linux (or another Linux environment) and want to scan a Windows partition offline. The antivirus engine used is ClamAV. 1. Install Required Tools Open a terminal. Update packages: sudo apt update Install malware-scanning tools: sudo apt install clamav clamav-daemon yara git wget curl Verify installation: clamscan --version 2. Stop Automatic Signature Service (Temporary) The updater sometimes locks the database. sudo systemctl stop clamav-freshclam 3. Download Official ClamAV Signatures Update virus database: sudo freshclam You should see downloads such as: main.cvd daily.cvd bytecode.cvd These are stored in: /var/lib/clamav/ 4. Install Large Third-Party Signature Feeds These greatly increase detection of APT malware, backdoors, RATs, and espionage tools. A well-known project aggregates many feeds automatically. Install: cd /opt sudo git clone https://github.com/extremeshok/clamav-unofficial-sigs cd clamav-unofficial-sigs sudo bash install.sh This installs feeds from threat-intelligence projects such as: SaneSecurity URLHaus MalwareBazaar These add tens of thousands of additional signatures. Update them: sudo /usr/local/sbin/unofficial-sigs.sh 5. Configure the ClamAV Daemon Edit daemon configuration: sudo nano /etc/clamav/clamd.conf Important performance settings: MaxThreads 12 MaxScanSize 2000M MaxFileSize 1000M MaxRecursion 20 MaxFiles 50000 ScanArchive yes DetectPUA yes LogTime yes LogVerbose yes Enable local socket (fastest communication): LocalSocket /run/clamav/clamd.sock LocalSocketMode 666 Save the file. 6. Start the ClamAV Daemon Start the service: sudo systemctl start clamav-daemon Check status: sudo systemctl status clamav-daemon 7. Install APT Malware Detection Rules (YARA) APT malware is often detected by behavioral patterns rather than antivirus signatures. Install rules: sudo mkdir /opt/yara-rules cd /opt/yara-rules Download common rule sets: APT malware rules: git clone https://github.com/Yara-Rules/rules Advanced malware rules by Florian Roth: git clone https://github.com/Neo23x0/signature-base These contain thousands of rules used by threat hunters. 8. Identify the Windows Partition List disks: lsblk Example output: sda ├─sda1 EFI ├─sda2 Windows 9. Mount the Windows Partition Create mount directory: sudo mkdir /mnt/windows Mount partition: sudo mount /dev/sda2 /mnt/windows Now the Windows filesystem is accessible at: /mnt/windows 10. Run Fast Malware Scan Using ClamAV Daemon Skip to step 17. 11. Save Scan Results to a Log File Skip to step 17. 12. Run APT Malware Threat Hunt Using YARA This can detect: espionage malware command-and-control implants advanced backdoors ransomware frameworks Skip to step 17. 13. Scan Critical Windows Malware Locations Many malware files hide here: /mnt/windows/Windows/System32 /mnt/windows/Windows/System32/drivers /mnt/windows/ProgramData /mnt/windows/Users /mnt/windows/Temp Example targeted scan: sudo clamdscan -r /mnt/windows/Windows/System32 14. Search for Suspicious Executables Look for unusual binaries: find /mnt/windows -name "*.exe" find /mnt/windows -name "*.dll" find /mnt/windows -name "*.sys" Large suspicious files: find /mnt/windows -type f -size +50M 15. Detect Hidden Persistence Locations Common malware persistence directories: /mnt/windows/ProgramData /mnt/windows/Users/*/AppData/Roaming /mnt/windows/Users/*/AppData/Local/Temp Scan example: sudo clamdscan -r /mnt/windows/ProgramData 16. Optional: Scan Windows Registry Hives Registry files contain persistence entries. Location: /mnt/windows/Windows/System32/config Example analysis: strings SOFTWARE | less Look for suspicious autoruns. 17. Full Automated Scan Command The daemon scanner (clamdscan) is much faster than clamscan. You can combine everything: Recommended deep scan: sudo clamdscan -r \ --fdpass \ --multiscan \ --log=/root/full_windows_scan.log \ /mnt/windows Explanation: Option Meaning -r recursive scan --fdpass bypass Linux file permissions --multiscan parallel scanning threads Then run YARA: sudo yara -r /opt/yara-rules /mnt/windows >> /root/full_windows_scan.log This can detect: espionage malware command-and-control implants advanced backdoors ransomware frameworks ============================================================== Important Reality Check Even with many signatures: ClamAV YARA can detect known APT malware, but brand-new nation-state tools are often custom and may evade antivirus. Professional investigations also use: memory forensics network traffic analysis behavioral monitoring ================================================================ ✅ If you want, I can also show you a very powerful technique used by malware analysts: How to detect stealth rootkits and espionage implants by comparing Windows system files against Microsoft's official hashes. This method can expose very advanced malware that antivirus completely misses. Regards, Mr. Turritopsis Dohrnii Teo En Ming Extremely Democratic People's Republic of Singapore 11 Mar 2026 Wednesday 7.17 pm Singapore Time _______________________________________________ Manage your clamav-users mailing list subscription / unsubscribe: https://lists.clamav.net/mailman/listinfo/clamav-users Help us build a comprehensive ClamAV guide: https://github.com/Cisco-Talos/clamav-documentation https://docs.clamav.net/#mailing-lists-and-chat
