alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Bazaloader Variant Activity"; flow:established,to_server; http.method; content:"HEAD"; http.uri; content:"/act/resume"; bsize:11; http.header; content:"Update|3a 20|/act/resume|0d 0a|"; fast_pattern; http.header_names; content:!"Referer"; content:!"User-Agent"; content:!"Accept"; reference:url,twitter.com/James_inthe_box/status/1319298609255383040; classtype:trojan-activity; sid:2031085; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_10_22, deployment Perimeter, deployment SSLDecrypt, malware_family BazaLoader, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_22;)