word number: 1027
Time: 2021-09-25 15:30:33 +0000
I have a few experience in playing around with cyber attacks, but it was merely a curiosity and I did this on my own PCs and virtual machines. Back then I tried exploiting the vulnerability on port 445 SMB using an exploit prepared by Metasploit. Metasploit also provided a tool to make backdoors (Trojan) which I practice after hijacking. The result was I can remotely control the victim’s PC and after I activate the backdoor, I can connect whenever I want. Then after the vulnerability is patched (system updated) exploiting port 445 no longer works as explained on this lecture but for as long the backdoor is still implanted I can still remotely connect through there. If the vulnerability is exploited once and the system got infected by a virus, just patching it will not be enough. The infection must be healed. This is the fourth assignment from my Masters Advanced Network Security Course which has never been published anywhere and I, as the author and copyright holder, license this assignment customized CC-BY-SA where anyone can share, copy, republish, and sell on condition to state my name as the author and notify that the original and open version available here.
Most famous attack is buffer overflow. PCs for file sharing are susceptible to remote buffer overflow. What happens if vulnerability is announced
The first case automatically or manually apply the patch. The second case disable the application or port that is vulnerable. Vulnerability can be:
In case of design, the service must be disabled and reprogram. Case of misconfiguration, edit the configuration file, and as for modules disable and edit the module. To handle the vulnerabilities above the following common steps are taking.
If not taking the steps above then there’s a risked in rebuilding the system from the scratch since there’s a chance in breaking the system when performing modification.
As written on the first part if it is already infected by a virus or worm then the infection must be cleaned. A software called antivirus had been developed which detects the infection based on patterns of the virus. By installing this software it can prevent and also clean the infections, but even this software is not perfect. If the antivirus cannot detect the infection then it’s suggested to take the 5 steps above in dealing with the vulnerability. Worst case we must backup the data, destroy and rebuild the system.
The term “policy” is a set of rules and procedures that is agreed by involving parties, and then carried out. In my opinion the strategy build this information security policy must be carried out not in a hasty pace, because it includes parties that is not professional in IT and some are less aware of the cyber attacks that occurs. Even as a information security professional, if given a large book of the information security policy will respond as “this will take time to review”. So it is recommend to take it step by step as in some standards from International Standard Organization (ISO).