alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/Lightning Stealer Exfil Activity"; flow:established,to_server; http.method; content:"POST"; http.header_names; content:!"|0d 0a|User-Agent|0d 0a|"; http.content_type; content:"application/json"; bsize:16; http.request_body; content:"|22|LogChromes|22 3a|"; content:"|22|LogGecko|22 3a|"; content:"|22|Screen|22 3a 7b|"; fast_pattern; content:"|22|Width|22 3a 22|"; distance:0; content:"|22|ScreenshotBase64|22 3a 22|"; distance:0; reference:md5,1b922b6d15085da82e20fee0789a6617; reference:url,twitter.com/3xp0rtblog/status/1509484987401351177; classtype:trojan-activity; sid:2035679; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_31, deployment Perimeter, malware_family MSIL_Lightning, confidence High, signature_severity Major, tag Stealer, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_31;)