alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE [PTsecurity] MSIL/Biskvit.A Check-in"; flow:established,to_server; urilen:15; http.method; content:"POST"; http.uri; content:"/api/auth/token"; http.header; content:"Authorization|3a 20 0d 0a|"; depth:18; fast_pattern; content:"Expect|3a 20|100-continue"; http.request_body; content:"{|22|ApiKey|22 3a 22|"; depth:11; isdataat:!100,relative; http.connection; content:"Keep-Alive"; depth:10; http.content_type; content:"application/json"; depth:16; http.header_names; content:"|0d 0a|Authorization|0d 0a|"; depth:17; content:!"Accept"; content:!"Referer|0d 0a|"; content:!"User-Agent|0d 0a|"; reference:url,www.fortinet.com/blog/threat-research/russian-army-exhibition-decoy-leads-to-new-biskvit-malware.html; classtype:trojan-activity; sid:2026007; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_08_22, deployment Perimeter, malware_family MSIL_Biskvit_A, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_03;)