ShellBot DDoS Malware Installed Through Hexadecimal Notation Addresses Posted By Sanseo , October 12, 2023 AhnLab Security Emergency response Center (ASEC) has recently discovered a change in the distribution method of the ShellBot malware, which is being installed on poorly managed Linux SSH servers. The overall flow remains the same, but the download URL used by the threat actor to install ShellBot has changed from a regular IP address to a hexadecimal value. 1. Past Case of URL Detection Evasion Typically, IP addresses are used in the “dot-decimal notation” format, with threat actors using addresses…
Tsunami DDoS Malware Distributed to Linux SSH Servers Posted By Sanseo , June 20, 2023 AhnLab Security Emergency response Center (ASEC) has recently discovered an attack campaign that consists of the Tsunami DDoS Bot being installed on inadequately managed Linux SSH servers. Not only did the threat actor install Tsunami, but they also installed various other malware such as ShellBot, XMRig CoinMiner, and Log Cleaner. When looking at the attack cases against poorly managed Linux SSH servers, most of them involve the installation of DDoS bots or CoinMiners. DDoS bot has been covered here in…
ChinaZ DDoS Bot Malware Distributed to Linux SSH Servers Posted By Sanseo , March 24, 2023 AhnLab Security Emergency response Center (ASEC) has recently discovered the ChinaZ DDoS Bot malware being installed on inadequately managed Linux SSH servers. As one of the Chinese threat groups that were first discovered around 2014, the ChinaZ group installs various DDoS bots on Windows and Linux systems. [1] Major DDoS bots assumed to have been created by the ChinaZ threat group include XorDDoS, AESDDos, BillGates, and MrBlack. This article will cover the DDoS bot known as ChinaZ or ChinaZ DDoSClient. 1. Attack…
ShellBot Malware Being Distributed to Linux SSH Servers Posted By Sanseo , March 17, 2023 AhnLab Security Emergency response Center (ASEC) has recently discovered the ShellBot malware being installed on poorly managed Linux SSH servers. ShellBot, also known as PerlBot, is a DDoS Bot malware developed in Perl and characteristically uses IRC protocol to communicate with the C&C server. ShellBot is an old malware that has been in steady use and is still being used today to launch attacks against Linux systems. 1. Attack Campaigns Against Linux SSH Servers Unlike desktop, which is the main…
