alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Harvester Group Downloader Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/api/Values_V2/Getting3210"; bsize:26; fast_pattern; http.host; content:".azurewebsites.net"; endswith; http.header_names; content:"|0d 0a|MC|0d 0a|Ath|0d 0a|Host|0d 0a 0d 0a|"; content:!"Referer"; reference:url,symantec-enterprise-blogs.security.com/blogs/threat-intelligence/harvester-new-apt-attacks-asia; reference:md5,2578bf48da48c262e4a83e2a9ae47c68; classtype:trojan-activity; sid:2034223; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_10_18, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_18;)