Rule History

alert dns $HOME_NET any -> any any (msg:"ET MALWARE Grandoreiro Banking Trojan DGA Domain in DNS Lookup (freedynamicdns. org)"; dns.query; content:"iuc1"; fast_pattern; startswith; pcre:"/^[\da-z]{11}/R"; content:".freedynamicdns.org"; distance:0; reference:url,www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/grandoreiro-banking-malware-resurfaces-for-tax-season/; classtype:trojan-activity; sid:2036724; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_05_27, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_27;)