Versions (5)
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Rev: 2 • Sep 15, 2015, 12:00 PMET MALWARE Cryptowall docs campaign Sept 2015 encrypted binary (1)
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Cryptowall docs campaign Sept 2015 encrypted binary (1)"; flow:established,to_client; file_data; content:"|23 31 f9 4f 62 57 73 67|"; within:8; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2021778; rev:2; metadata:created_at 2015_09_15, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)
Sep 15, 2015, 12:00 PM
Jul 26, 2019, 12:00 PM
Sep 21, 2024, 3:00 AM
Dec 5, 2025, 11:34 PM
rules/emerging-malware.rules