ET WEB_SERVER Image Content-Type with Obfuscated PHP (Seen with C99 Shell)

SID: 2015755Rev: 40 viewsHistory

Sourceet/open

CreatedOctober 2, 2012

UpdatedApril 22, 2020

Classificationattempted-user

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SERVER Image Content-Type with Obfuscated PHP (Seen with C99 Shell)"; flow:from_server,established; http.content_type; content:"image/"; startswith; file.data; content:"eval(gzinflate(base64_decode("; distance:0; fast_pattern; reference:url,malwaremustdie.blogspot.jp/2012/10/how-far-phpc99shell-malware-can-go-from.html; classtype:attempted-user; sid:2015755; rev:4; metadata:created_at 2012_10_02, signature_severity Major, updated_at 2020_04_22, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;)

References

url	malwaremustdie.blogspot.jp/2012/10/how-far-phpc99shell-malware-can-go-from.html

Metadata

created at2012_10_02

signature severityMajor

updated at2020_04_22

mitre tactic idTA0005

mitre tactic nameDefense_Evasion

mitre technique idT1027

mitre technique nameObfuscated_Files_or_Information

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