February 2012
Intermediate to advanced
800 pages
23h 55m
English
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Lab 12-4 Solutions
Short Answers
The malware checks to see if a given PID is winlogon.exe.
Winlogon.exe is the process injected.
The DLL sfc_os.dll will be used to disable Windows File Protection.
The fourth argument passed to
CreateRemoteThreadis a function pointer to an unnamed ordinal 2 (SfcTerminateWatcherThread) of sfc_os.dll.The malware drops a binary from its resource section and overwrites the old Windows Update binary (wupdmgr.exe) with it. Before overwriting the real wupdmgr.exe, the malware copies it to the %TEMP% directory for later usage.
The malware injects a remote thread into winlogon.exe and calls a function exported by sfc_os.dll, ordinal 2 (
SfcTerminateWatcherThread), to disable Windows File Protection until the next reboot. The ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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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.