Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Win32/Sehyioa Variant Activity (Download)"; flow:established,to_client; http.stat_code; content:"200"; file_data; content:"seCurEstrInGTogloBALAlLoCUnicOdE|28 20 24 28 27|76492d1116743f0423413b16050a5345MgB8A"; nocase; fast_pattern; reference:md5,fc30e902d1098b7efd85bd2651b2293f; reference:url,www.group-ib.com/blog/oldgremlin; classtype:trojan-activity; sid:2030905; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_09_23, deployment Perimeter, malware_family Win32_Sehyioa, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_23;)