alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN ELF/Muhstik - IRC CnC? Checkin"; flow:established,to_server; dsize:<250; content:"NICK|20|"; depth:5; content:"|0d|USER|20|muhstik"; distance:0; content:"|20 3a|muhstik-"; distance:0; fast_pattern; pcre:"/^\d+\x0a$/R"; metadata: former_category MALWARE; reference:url,; classtype:trojan-activity; sid:2029319; rev:2; metadata:attack_target Networking_Equipment, deployment Perimeter, tag IRC, signature_severity Major, created_at 2020_01_23, malware_family Muhstik, performance_impact Low, updated_at 2020_01_23;)

Added 2020-01-23 19:24:37 UTC

Topic revision: r1 - 2020-01-24 - TWikiGuest
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