ET HUNTING JavaScript Engine JIT Forcing Observed - Investigate Possible Exploitation M5
Sourceet/open
CreatedNovember 18, 2021
UpdatedDecember 4, 2024
Classificationunknown
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING JavaScript Engine JIT Forcing Observed - Investigate Possible Exploitation M5"; flow:established,to_client; http.stat_code; content:"200"; file.data; content:"function"; fast_pattern; content:"let"; pcre:"/^\s*(?P<count_var>[\w\-]{1,20})\s*=\s*(0x[a-f0-9]{3,12}|\d{4,12}).{1,500}function\s*(?P<jit_func>[\w\-]{1,30})\(.{1,500}for\s*\(let\s*(?P<counter>[\w\-]{1,20})\s*=\s*\d+\s*\x3b\s*(?P=counter)\s*<\s*(?P=count_var)\s*\x3b\s*(?P=counter)\+{2}\s*\).{1,100}(?P=jit_func)\(/Rs"; classtype:unknown; sid:2058055; rev:2; metadata:created_at 2021_11_18, confidence Medium, signature_severity Major, tag possible_exploitation, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_12_04, former_sid 2850492;)
Metadata
created at2021_11_18
confidenceMedium
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2024_12_04
former sid2850492
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