February 2012
Intermediate to advanced
800 pages
23h 55m
English
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Lab 13-1 Solutions
Short Answers
Two strings appear in the beacon that are not present in the malware. (When the
stringscommand is run, the strings are not output.) One is the domain,www.practicalmalwareanalysis.com. The other is theGETrequest path, which may look something likeaG9zdG5hbWUtZm9v.The
xorinstruction at 004011B8 leads to a single-byte XOR-encoding loop insub_401190.The single-byte XOR encoding uses the byte
0x3B. The raw data resource with index 101 is an XOR-encoded buffer that decodes towww.practicalmalwareanalysis.com.The PEiD KANAL plug-in and the IDA Entropy Plugin can identify the use of the standard Base64 encoding string:
ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/
Standard Base64 encoding is used ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.