ET INFO FREAK Weak Export Suite From Client (CVE-2015-0204)

SURICATA detection rule by HydraDragonAntivirus · GPL-2.0

Dynamic and static analysis with Real Time Malware Analysis with Antivirus for Windows, including open-source XDR (3 EDR projects), ClamAV, YARA-X, machine learning AI, behavioral analysis, Unpacker, Deobfuscator, Decompiler, website signatures, Ghidra, Suricata, Sigma, Kernel, Hypervisior based protection and much more than you can imagine.

alert tcp $HOME_NET any -> any [21,25,110,143,443,465,587,636,989:995,5061,5222] (msg:"ET INFO FREAK Weak Export Suite From Client (CVE-2015-0204)"; flow:established,to_server; content:"|16 03|"; depth:2; byte_test:1,<,4,0,relative; content:"|01|"; distance:3; within:1; byte_jump:1,37,relative; byte_extract:2,0,SuiteLength,relative; content:"|00 0E|"; within:SuiteLength; fast_pattern; threshold:type limit,track by_src,count 1,seconds 1200; reference:url,blog.cryptographyengineering.com/2015/03/attack-of-week-freak-or-factoring-nsa.html; reference:cve,2015-0204; reference:cve,2015-1637; classtype:bad-unknown; sid:2020637; rev:4; metadata:created_at 2015_03_06, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

17ddb4a1-9b5d-4b40-92a6-73178db73282

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

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Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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