alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible CVE-2015-2424 RTF Dropping Sofacy"; flow:established,from_server; file_data; content:"D0CF11E0A1B11AE1"; nocase; content:"ffffffffff74303074"; nocase; distance:0; fast_pattern; reference:md5,112c64f7c07a959a1cbff6621850a4ad; reference:url,isightpartners.com/2015/07/microsoft-office-zero-day-cve-2015-2424-leveraged-by-tsar-team/; classtype:targeted-activity; sid:2021431; rev:2; metadata:created_at 2015_07_17, cve CVE_2015_2424, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)