alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Kimsuky Maldoc Activity"; flow:established,to_server; http.method; content:"HEAD"; http.uri; content:"/tmp?q=6"; endswith; fast_pattern; http.user_agent; content:"|20|Office|20|"; http.header_names; content:!"Referer"; content:!"Accept"; reference:url,twitter.com/ShadowChasing1/status/1372464570183208961; reference:md5,1670bb091dba017606ea5e763072d45f; classtype:trojan-activity; sid:2032275; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_03_22, deployment Perimeter, malware_family Kimsuky, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_22;)