alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Nobelium APT Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/1/members/me/boards?key=664f145b65b9ea751df4dd21a96601f0&token=39daa5890c85fba874a352473b2fa9a97c7839223422411c22f22970f3b71ecc"; fast_pattern; http.host; content:"api.trello.com"; bsize:14; http.header_names; content:!"Referer|0d 0a|"; http.user_agent; content:"(iPad|3b 20|CPU|20|OS|20|"; reference:md5,c4df0507f56e30b264c848c6096b69ae; reference:url,inquest.net/blog/2022/04/18/nobelium-israeli-embassy-maldoc; classtype:trojan-activity; sid:2036417; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_04_28, deployment Perimeter, deployment SSLDecrypt, malware_family Nobelium, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_28;)