Stay informed on botnet trends, attacks, and defenses. Get the latest updates and expert insights on botnet threats in information security.
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Background for this topic.
A botnet is a network of compromised internet-connected devices controlled remotely by an attacker through malware. These devices, known as bots, receive commands from centralized or decentralized command-and-control (C2) servers to perform coordinated actions such as launching Distributed Denial of Service (DDoS) attacks, sending spam, or distributing additional malware. Botnets vary in size and complexity, often leveraging vulnerabilities in devices or weak authentication to propagate.
In information security, botnets pose significant risks including large-scale service disruptions from DDoS attacks and the unauthorized use of infected devices for malicious activities. Detecting botnet activity involves monitoring network traffic for unusual patterns and identifying communication with known C2 infrastructure. Effective defense includes timely patching of vulnerable systems, blocking C2 domains or IPs based on threat intelligence, and isolating infected hosts to prevent further spread or damage. Coordinated efforts to disrupt botnet infrastructure can reduce their operational impact.
Spanish-speaking users in Latin America have been at the receiving end of a new botnet malware dubbed Horabot since at least November 2020
A previously unknown campaign involving the Hotabot botnet malware has targeted Spanish-speaking users in Latin America since at least November 2020, infecting them with a banking trojan and spam tool. [...]
An analysis of the "evasive and tenacious" malware known as QBot has revealed that 25% of its command-and-control (C2) servers are merely active for a single day
Vulnerability being "widely exploited" in Mirai-based botnet attacks
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a recently patched critical security flaw in Zyxel gear to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation
Researchers have observed several cyberattacks leveraging a botnet called IZ1H9, which exploits vulnerabilities in exposed devices and servers running on Linux.