How to analyze Malware when it infected all my exe files

Question

I'm analyzing a trojan on my virtualbox win7-32. when I run the trojan, it infected all exe files,consequently I could not use any malware analyzer program (process monitor or process hacker...) to analyze it to get result.How can I handle it?

Answer 1

There is plenty of way of getting these informations. You can: decompile the trojan and analyse it's behavior from the raw bytecode/sourcecode. Observe change in directory (many tools, from git to specialized software ...). Dump registry and compare after trojan action. Use native cmd line to see ports and connexion (with netstat -a -n -o or piece of software). As you are not providing clear and full information on your problem (that's where the downvotes happen), I doubt anyone would help you more on this (transparency is a key to get help).

Also, depending of your situation, I would advice hiring a security expert that will be able to do the deep investigation for you.

Finally it is very probable that you can find details on this trojan on security database from it's simple name.