Rule History

SID: 2013350 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 5 • Aug 4, 2011, 12:00 PM

Message:

ET MALWARE Connectivity Check of Unknown Origin 2

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Connectivity Check of Unknown Origin 2"; flow:established,to_server; urilen:21; content:"GET"; http.uri; content:"/whois/usgoodluck.com"; fast_pattern; http.user_agent; bsize:24; content:"Mozilla/4.0 (compatible)"; http.host; bsize:20; content:"www.whois-search.com"; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a|"; startswith; classtype:trojan-activity; sid:2013350; rev:5; metadata:created_at 2011_08_04, confidence Medium, signature_severity Major, updated_at 2024_03_04;)

Created:

Aug 4, 2011, 12:00 PM

Updated:

Mar 4, 2024, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-malware.rules