Versions (4)
Version DetailsCurrent
Rev: 1 • Nov 29, 2021, 12:00 PMET MALWARE Cobalt Strike Related Domain in DNS Lookup (checkauj .com)
alert dns $HOME_NET any -> any any (msg:"ET MALWARE Cobalt Strike Related Domain in DNS Lookup (checkauj .com)"; dns.query; content:"checkauj.com"; nocase; bsize:12; reference:md5,ab3a744545a12ba2f6789e94b789666a; reference:url,thedfirreport.com/2021/11/29/continuing-the-bazar-ransomware-story/; classtype:domain-c2; sid:2034551; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_11_29, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_29;)
Nov 29, 2021, 12:00 PM
Nov 29, 2021, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 8, 2025, 9:34 PM
rules/emerging-malware.rules