Rule History

SID: 2021775 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 4 • Sep 15, 2015, 12:00 PM

Message:

ET MALWARE AlphaCrypt Connectivity Check 1

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE AlphaCrypt Connectivity Check 1"; flow:established,to_server; urilen:4; http.uri; content:"/raw"; fast_pattern; http.user_agent; content:"Mozilla/5.0 (Windows NT 6.1|3b 20|rv|3a|31.0) Gecko/20100101 Firefox/31.0"; endswith; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; startswith; reference:md5,d0e3471f4963496cefd73744e98340aa; classtype:trojan-activity; sid:2021775; rev:4; metadata:created_at 2015_09_15, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_05;)

Created:

Sep 15, 2015, 12:00 PM

Updated:

Oct 5, 2020, 12:00 PM

DB Created:

Sep 15, 2015, 12:00 PM

DB Updated:

Nov 24, 2025, 10:34 PM

Filename:

rules/emerging-malware.rules