| Port No | 113 |
| Service Name | Unix/Admworm.A |
| RFC Doc | 0 |
| Protocol | TCP |
| Description | This Linux script malware contains several components of scripts and binaries that attempt to exploit the vulnerable BIND (Berkeley Internet Name Domain) systems to gain access as well as attack other systems by copying its package to these vulnerable systems.
The malware creates a user account "w0rm" with NULL password and sends the target machine's IP address to the remote user, which is assumed to be the author of the malware. It also overwrites all INDEX.HTML files in an infected system with the following text strings: "The ADM Inet w0rm is here !". It propagates by scanning a range of IP addresses on the Internet for other vulnerable systems. Most of its malicious components are detected as UNIX_ADM.WORM.A but there are other components that are detected as UNIX_HIJACK.A. |
| Reference Link | Unix/Admworm.A |
| Attack | Solutions: PREVENTING YOUR SYSTEM FROM THIS ATTACK To make sure that your system is immune from this exploit, you will need to upgrade to the current version of BIND. REPAIRING THE INFECTED SYSTEM Type in the following commands on the Linux command prompt: To delete SUID Root Shell created by the malware, type: /bin/rm -rf /tmp/.w0rm To terminate the running malware process from memory, type: /usr/bin/killall -9 ADMw0rm To delete worm’s files located in its created subfolder, type: /bin/rm -rf /tmp/.w0rm0r To remove the worm user account created by the malware, type: /usr/sbin/userdel -r w0rm |
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