February 2012
Intermediate to advanced
800 pages
23h 55m
English
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Lab 18-3 Solutions
First, we run PEiD on the Lab18-03.exe file, and it tells us that the packer is PECompact 1.68 - 1.84 -> Jeremy Collake. We load the program into OllyDbg and see several warnings that the file may be packed. We can ignore these warnings.
The program starts at address 0x00405130. We try the Find OEP by Section Hop (Trace Into) option in the OllyDump plug-in. We see the code shown in Example C-176 as OllyDump’s guess at the OEP. However, there are several reasons this doesn’t look like the OEP. The most obvious is that it accesses values above the base pointer at ❶. If this were the file’s entry point, any data above the base pointer would not have been initialized.
Example C-176. OllyDump’s guess at the OEP after using the Find ...
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