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Tag Archives | linux

load_all.jar

Today we found Java based malware. If attacker found File Upload vulnerability on the server, then it upload manual.php based malware, which trying load load_all.jar to server and running it background. Manual.php $out = shell_exec(“java -version 2>&1”); preg_match(“/version\s+\”1\.(\d+)\./”,$out,$matches); $ver = 0; if($matches)$ver = (int)$matches[1]; This manual.php uses lot off shell_exec function, but if you have […]

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How To Set Up a Firewall Using Iptables

Setting up a good firewall is an essential step to take in securing any modern operating system. Most Linux distributions ship with a few different firewall tools that we can use to configure our firewalls. In this guide, we’ll be covering the iptables firewall. A good starting point is check the current rules that are […]

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Linux Server Hardening Security Tips

Securing your Linux server is important to protect your and customers data, intellectual property, and time, from the hands of crackers/hackers. The system administrator is responsible for security Linux Server. 1. Use only Encrypt Data Communication Because all data transmitted over a network is open to monitoring. Encrypt transmitted data whenever possible with password or […]

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