DoS:Linux/Xorddos.A (Microsoft); HEUR:Trojan-DDoS.Linux.Agent.g (Kaspersky); Linux.Xorddos!gen1 (Symantec); Linux/DDoS.XOR (AVG); ELF:Xorddos-M [Trj] (Avast);
Unix, Linux
Downloaded from the Internet
This malware launched distributed denial of service (DDoS) attacks to a number of gaming- and education-related websites. Its communication with its servers are encrypted via XOR, hence the name.
To get a one-glance comprehensive view of the behavior of this Backdoor, refer to the Threat Diagram shown below.
This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.
617,715 bytes
ELF
Yes
26 Sep 2015
Downloads files, Hides files and processes, Launches DoS/DDoS attacks, Compromises network security
Arrival Details
This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This backdoor drops the following copies of itself into the affected system:
Autostart Technique
This backdoor drops the following files:
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
It connects to the following websites to send and receive information:
Download Routine
This backdoor connects to the following URL(s) to download its configuration file:
NOTES:
This backdoor drops a shell script in /etc/init.d folder which setups the autostart mechanism of the malware.
This backdoor creates five shortcut links which points to the script in /etc/init.d:
This malware is capable of doing the following flooding attack:
9.700
11.952.04
01 Oct 2015
11.953.00
02 Oct 2015
Scan your computer with your Trend Micro product to delete files detected as ELF_XORDDOS.AP. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
