full-disclosure - Using Magic Values along with filetype to find malicious files (was RE: Google Malware Search)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Mon Jul 17 20:34:08 2006
From: debasis.mohanty.listmails at gmail.com (Debasis Mohanty)
Subject: Using Magic Values along with filetype to find malicious files (was
	RE: Google Malware Search)

Nice .. Realy nice pointers H.D. !! :)

I was thinking on different lines, possibly one can use magic values of
different types of executables along with "filetype:" keyword. 

For Example: 
EXE -- 0x5A4D
NT -- 0x4550 
OS2 -- 0x454E 
OS2 LE -- 0x454C
VXD -- 0x454C

Now, if one has to search for malicious binaries in the form of .scr, .com
or .pif etc then (s)he can issue the following search keywords - 

"intext: signature: 5A4D" filetype:scr
"intext: signature: 5A4D" filetype:pif
"intext: signature: 5A4D" filetype:doc

or (without using "intext")

signature: 00004550 filetype:scr
signature: 00004550 filetype:doc


The results can be narrowed down using a signature database like the one
being used here - http://metasploit.com/research/misc/mwsearch/sigs.txt

Similar results can also be achieved using search keywords for specific
details in a PE / LE header. For example - 

Search for ["intext: Image File Header" filetype:scr] gives almost the same
result as ["intext: signature: 5A4D" filetype:scr]


-d (aka t)
www.hackingspirits.com


-----Original Message-----
From: full-disclosure-bounces@...ts.grok.org.uk
[mailto:full-disclosure-bounces@...ts.grok.org.uk] On Behalf Of H D Moore
Sent: Monday, July 17, 2006 10:29 AM
To: full-disclosure@...ts.grok.org.uk
Subject: [Full-disclosure] Google Malware Search

http://metasploit.com/research/misc/mwsearch/?q=bagle

Enjoy,

-HD

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/