In my last diary entry I mentioned offline use of Sysinternal tools with my tool virustotal-search.
So you want to use sigcheck but you cant connect the machine to the Internet. Then you can use sigchecks option -h to calculate cryptographic hashes of the files it checks, and option -c to produce a CSV output (-ct for CSV with a tab separator). If you want, you can limit sigcheck" />
To extract a unique list of MD5 hashes, you can use this pipe of awk, tail, sed and sort (for a tab separated CSV file):
awk -F t {print $10} sigcheck-system32.csv | tail -n +2 | sed s///g | sort -u
And then you can use virustotal-search to submit the hashes.
If you suspect the machine is infected with malware that has rootkit features, then dont boot from the suspect disk, but mount the disk on another machine or boot from a Live CD and use sigcheck to scan the disk.
Didier Stevens
Microsoft MVP Consumer Security
blog.DidierStevens.com DidierStevensLabs.com