VirusTotal
VirusTotal is a web application that inspects items with over 70 antivirus scanners and URL/domain blacklisting services. In addition, it uses other tools and services to extract additional signals from the given sample.
In other words, a user can upload a suspicious file, link or piece of information and have it scanned for any possible malicious contents or origin.
VirusTotal services consist of:
- File scanning
- URL/Domain scanning
- IP Address
- File Hashes
NOTICE: All the information uploaded on VT are passing through an external database publicly. Therefore, never use VT to upload sensitive information that you don't want to make public.
RKill
In some cases, a malware that have infected a machine might execute processes that disable the computer's antivirus software and keeping it disabled as long as that process is running. Rkill is a free software that can be used to identify known malware processes running on a machine and terminate them. Note that this tool does not remove viruses, it just stops their processes so that the user will be able to run a scan with their antivirus or manually clean the malicious file. If the malware is not cleared, the terminated processes will start running again when the computer restarts.