alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE KeyBase Keylogger HTTP Pattern"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:"/post.php?type="; fast_pattern; content:"&machinename="; distance:0; http.header_names; content:!"|0d 0a|User-Agent|0d 0a|"; content:"|0d 0a|Host|0d 0a|"; startswith; pcre:"/^(?:Connection\x0d\x0a)?\x0d\x0a$/R"; reference:md5,5626771cf6751286de4b90ea4b8df94d; reference:url,researchcenter.paloaltonetworks.com/2015/06/keybase-keylogger-malware-family-exposed/; classtype:trojan-activity; sid:2021440; rev:6; metadata:created_at 2015_07_20, signature_severity Major, updated_at 2024_04_06;)