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Old 02-27-2012, 05:19 PM
aiwnjoo aiwnjoo is offline
Join Date: Oct 2008
Posts: 10
Default PID says UPX but problems happen.


Protection ID says it is packed with UPX (Latest) so I unpack it then the file does not run so presume something else is at work here and would be good if you can provide any information on this.

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Old 02-27-2012, 06:16 PM
Git Git is offline
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Join Date: Oct 2007
Location: Torino
Posts: 1,797

PE Explorer unpacks several flavors of UPX.

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Old 02-27-2012, 06:36 PM
kao kao is offline
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Join Date: Sep 2007
Posts: 184

There's additional protection for the most juicy part of code. Small virtual machine - VMProtect, if I'm not mistaken.
See here:
UPX0:00401800  push    ebp
UPX0:00401801  mov     ebp, esp
UPX0:00401803  and     esp, 0FFFFFFF8h
UPX0:00401806  push    ecx
UPX0:00401807  push    ebx
UPX0:00401808  push    esi
UPX0:00401809  push    edi
UPX0:0040180A  jmp     loc_40B517  ; --> oops. nasty code follows! :)
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