alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Scieron Retrieving Information"; flow:established,to_server; urilen:7; flowbits:set,ET.Trojan.Scieron.Ret; http.method; content:"GET"; http.uri; content:"/ip.txt"; fast_pattern; http.header_names; content:!"Accept"; content:!"Referer"; reference:url,symantec.com/connect/blogs/scarab-attackers-took-aim-select-russian-targets-2012; reference:md5,a36db258d0f6f085e8e5030d8e9a9bf4; classtype:trojan-activity; sid:2020296; rev:4; metadata:created_at 2015_01_23, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_18;)