Versions (3)
Version DetailsCurrent
Rev: 1 • Apr 15, 2025, 12:00 PMET MALWARE Observed Fake Captcha Domain (security .flearegaurdc .com) in TLS SNI
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Fake Captcha Domain (security .flearegaurdc .com) in TLS SNI"; flow:established,to_server; tls.sni; bsize:25; content:"security.flearegaurdc.com"; fast_pattern; reference:md5,676341fd22b73e8836c09ead43d6fbc4; classtype:domain-c2; sid:2061597; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2025_04_15, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2025_04_17, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)
Apr 15, 2025, 12:00 PM
Apr 17, 2025, 12:00 PM
Apr 15, 2025, 9:34 PM
Nov 7, 2025, 9:34 PM
rules/emerging-malware.rules