LOG4J (Resources for detection):
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Automatic approach:
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1. Nmap: https://github.com/Diverto/nse-log4shell
2. Burp Suite (Log4Shell Scanner) : https://portswigger.net/bappstore/b011be53649346dd87276bca41ce8e8f?tid=WIEX41vaM_H0cjTxCVjpJYK2RewzR2IWa54E47BfFFBiVsg46cJlReIiH1nh2tPJ
3. Detector : https://github.com/Neo23x0/log4shell-detector
4: log4j-finder : https://github.com/fox-it/log4j-finder
Manual approach:
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Command 1 :
$ sudo egrep -I -i -r '\$(\{|%7B)jndi:(ldap[s]?|rmi|dns|nis|iiop|corba|nds|http):/[^\n]+' /var/log
Command 2 :
$ sudo find /var/log -name \*.gz -print0 | xargs -0 zgrep -E -i '\$(\{|%7B)jndi:(ldap[s]?|rmi|dns|nis|iiop|corba|nds|http):/[^\n]+'
Command 3 :
$ sudo find /var/log/ -type f -exec sh -c "cat {} | sed -e 's/\${lower://'g | tr -d '}' | egrep -I -i 'jndi:(ldap[s]?|rmi|dns|nis|iiop|corba|nds|http):'" \;
Command 4 :
$ sudo find /var/log/ -name '*.gz' -type f -exec sh -c "zcat {} | sed -e 's/\${lower://'g | tr -d '}' | egrep -i 'jndi:(ldap[s]?|rmi|dns|nis|iiop|corba|nds|http):'" \;
Command 5 : Windows
gci 'C:\' -rec -force -include *.jar -ea 0 | foreach {select-string "JndiLookup.class" $_} | select -exp Path
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