Search the Community

Last Door is a utility written to wipe specific entries in arbitrary log files and if setuid, will also execute arbitrary commands without logging any history. README ___________ | |Linux |<Last|Door>|Root- | --------- |Backdoor | O |& | |Log- | |Cleaner |___________|~r0ng Hackers2DevNull.blogspot.co.uk (The user bears responsibility) Release Dec 2012 -V1 For a full writeup of the program, please visit my blog, URL above. [+] What is it? It is a backdoor program which enables a non-root user to send root commands to system, and a log cleaner with several functions. [+] Features? - Hardcoded password, no prompt/blank screen unless correct password entered - No need for user to SU prior to running - Protection for virtual file systems - All commands sent to system as root - Log cleaner searches the file system for chosen strings, no finite log lists used - Log cleaner options: - Search string replace with new string (e.g. change your ip in the logs) - Search string delete string - Search string delete line - Search string delete file contents - Multi-string search/destroy at once - Includes hidden files - Maintains the file modified date despite making changes - On running the log cleaner, the process is forked as a background daemon - User sets timer prior to running so they can logout/exit, and it will clean up after you have gone. - If you don't logout prior to the process starting, the file search process will be displayed - If you do logout prior to the process starting this will allow your .bash_history to refresh and be included in the search (shoud you want to delete your ./LastDoor command for example). [+] Compile/use? - gcc LastDoor.c -o LastDoor -Wall (all std libs used) - cp LastDoor /bin/LastDoor (for example) - chmod u+s /bin/LastDoor (set the s bit) - non-rootuser:~# /bin/LastDoor (run!) Download LastDoor.tar (40 KB) Source