February 2012
Intermediate to advanced
800 pages
23h 55m
English
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Lab 17-2 Solutions
Short Answers
The exports are
InstallRT,InstallSA,InstallSB,PSLIST,ServiceMain,StartEXS,UninstallRT,UninstallSA, andUninstallSB.The DLL is deleted from the system using a .bat file.
A .bat file containing self-deletion code is created, as well as a file named xinstall.log containing the string
"Found Virtual Machine, Install Cancel".This malware queries the VMware backdoor I/O communication port using the magic value
VXand the action0xAby using theinx86 instruction.To get the malware to install, patch the
ininstruction at 0x100061DB at runtime.To permanently disable the VM check, use a hex editor to modify the static string in the binary from
[This is DVM]5to[This is DVM]0. Alternatively, NOP-out the check in OllyDbg ...
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