alert tcp-pkt $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Known Sinkhole Response abuse.ch"; flow:established,to_client; dsize:22; content:"Sinkholed by abuse.ch|0a|"; fast_pattern; classtype:trojan-activity; sid:2020223; rev:5; metadata:created_at 2015_01_21, deprecation_reason Relevance, confidence High, signature_severity Major, updated_at 2024_03_26, reviewed_at 2024_03_26;)