Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Observed Malicious User-Agent (Brute Force Attacks)"; flow:established,to_server; http.user_agent; content:"Mozilla/5.0|20|(Windows|20|NT|20|10.0|3b 20|Win64|3b 20|x64)|20|AppleWebKit/537.36|20|(KHTML,|20|like|20|Gecko)|20|Chrome/70."; bsize:91; reference:url,media.defense.gov/2021/Jul/01/2002753896/-1/-1/1/CSA_GRU_GLOBAL_BRUTE_FORCE_CAMPAIGN_UOO158036-21.PDF; classtype:bad-unknown; sid:2033314; rev:1; metadata:created_at 2021_07_12, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_12;)