ET MALWARE Possible SSH Linux.Fokirtor backchannel command
Sourceet/open
CreatedNovember 16, 2013
UpdatedJuly 26, 2019
Classificationtrojan-activity
alert tcp $EXTERNAL_NET any -> any 22 (msg:"ET MALWARE Possible SSH Linux.Fokirtor backchannel command"; flow:established,to_server; content:"|3a 21 3b 2e|"; 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.symantec.com/connect/blogs/linux-back-door-uses-covert-communication-protocol; classtype:trojan-activity; sid:2017727; rev:6; metadata:created_at 2013_11_16, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)
Metadata
created at2013_11_16
confidenceMedium
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2019_07_26
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