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SID: 2019539 • Source: et/open

Versions (5)

Version DetailsCurrent

Rev: 5Oct 28, 2014, 12:00 PM

ET MALWARE Win32/Coreshell Checkin (APT28 Related)

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Coreshell Checkin (APT28 Related)"; flow:to_server,established; http.method; content:"POST"; http.uri; content:"/~xh/sn.cgi?"; fast_pattern; pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})+?$/R"; reference:url,www.fireeye.com/resources/pdfs/apt28.pdf; reference:md5,272f0fde35dbdfccbca1e33373b3570d; classtype:targeted-activity; sid:2019539; rev:5; metadata:created_at 2014_10_28, malware_family Win32_Coreshell, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_13;)

Oct 28, 2014, 12:00 PM

May 13, 2020, 12:00 PM

Sep 21, 2024, 3:00 AM

Oct 9, 2025, 9:35 PM

rules/emerging-malware.rules