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Address false positives with dojo.js and YUI #1018

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Merged
egibs merged 1 commit into from
Jun 27, 2025
Merged

Address false positives with dojo.js and YUI #1018

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5 changes: 5 additions & 0 deletions rules/anti-static/obfuscation/padding.yara
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,11 @@ rule msxml2_http: critical {
$not_fileapi = "MSXML2.XMLHttp.3.0\")}catch(c){b=new ActiveXObject(\"Microsoft.XMLHTTP\")}return b},isArray:l,support:{dnd:s&&\"ondrop\"i"
$not_i18next1 = "i18nextHttpBackend"
$not_i18next2 = "u[\"User-Agent\"]=\"i18next-http-backend (node/\".concat(S.process.version,\"; \")"
$not_yui1 = "Copyright (c) 2008, Yahoo! Inc. All rights reserved."
$not_yui2 = "http://developer.yahoo.net/yui/license.txt"
$not_yui3 = "version: 2.6.0"
$not_yui4 = "YAHOO.util.Connect={_msxml_progid:[\"Microsoft.XMLHTTP\",\"MSXML2.XMLHTTP.3.0\",\"MSXML2.XMLHTTP\"]"
$not_yui5 = "if(typeof YAHOO==\"undefined\"||!YAHOO){var YAHOO={};}YAHOO.namespace=function()"

condition:
filesize < 128KB and $a and !a > 32 and none of ($not*)
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5 changes: 3 additions & 2 deletions rules/exec/remote_commands/code_eval.yara
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Expand Up @@ -46,10 +46,11 @@ rule js_eval_response: critical {
strings:
$val = /eval\(\w{0,16}\.responseText\)/

$not_ejs = /EJS\.|EJS=/
$not_dojo = /dojo(\-|\_|x)/
$not_ejs = /EJS\.|EJS=/

condition:
filesize < 1MB and any of ($val*) and not #not_ejs > 0
filesize < 1MB and any of ($val*) and not #not_ejs > 0 and not #not_dojo > 0
}

rule js_eval_near_enough_fromChar: medium {
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