alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FinSpy Related Flash Installer Activity"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".asp?attachmentid="; content:"&d="; distance:0; http.request_body; content:"|c3 d6 21 f6 77 d7 95 61 2a 27 22 8b 2a d4 c9 16|"; fast_pattern; bsize:16; http.header_names; content:!"Referer"; reference:md5,a55aa68518586381213cd85441aa4e16; reference:url,www.amnesty.org/en/latest/research/2020/09/german-made-finspy-spyware-found-in-egypt-and-mac-and-linux-versions-revealed/; classtype:trojan-activity; sid:2030914; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_09_28, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_28;)