Practical Malware Analysis : Lab 1-3

Tools used:

• VirusTotal.com
• PEview
• PEiD
• Dependency Walker
• Malcode Analyst Pack

Questions

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1. Upload the Lab01-03.exe file to http://www.VirusTotal.com/. Does it match any existing antivirus definitions?

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2. Are there any indications that this file is packed or obfuscated? If so, what are these indicators? If the file is packed, unpack it if possible.

The file is packed with the FSG packer.

In PEview the file section is nameless.

The first section has a virtual size of 0x3000 but a raw data size of 0.

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3. Do any imports hint at this program’s functionality? If so, which imports are they and what do they tell you?

Using Dependency Walker I noticed there are only two functions.

Packed files often import only these two functions.

• LoadLibraryA
• GetProcAddress

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4. What host- or network-based indicators could be used to identify this malware on infected machines?

The file in unpacked and cannot be answered for now.

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