Rule History

alert dns $HOME_NET any -> any any (msg:"ET MALWARE CHIMNEYSWEEP Backdoor CnC Domain (update-pgp .com) in DNS Lookup"; dns.query; content:"update-pgp.com"; nocase; bsize:14; reference:url,www.mandiant.com/resources/likely-iranian-threat-actor-conducts-politically-motivated-disruptive-activity-against?1; classtype:domain-c2; sid:2037946; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_08_04, deployment Perimeter, malware_family CHIMNEYSWEEP, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_09_17, reviewed_at 2024_09_17;)