Q1 2026 Malware Statistics Report for Linux SSH Servers
Overview. ASEC analyzed the statistics of attacks against Linux SSH servers in Q1 2026 based on honeypot logs. The P2PInfect worm dominated, accounting for 70.3% of all attack sources, and DDoS bots such as Mirai, XMRig, Prometei, and CoinMiner were identified as the main threats. Purpose and Scope. the purpose
Statistics Report on Malware Targeting Linux SSH Servers in Q4 2025
AhnLab SEcurity intelligence Center (ASEC) utilizes a honeypot to respond to and classify brute-force and dictionary attacks targeting poorly managed Linux SSH servers. This post covers the status of the attack sources identified in the logs from the fourth quarter of 2025 and the statistics of attacks launched by these
Analysis of Gunra Ransomware Using Vulnerable Random Number Generation Function (Distributed for Linux Environments in ELF Format)
The Gunra ransomware group, which began its activities in April 2025, has been launching continuous attacks against various industries and companies around the world. Cases of damage have been reported in Korea as well. The distributed Gunra ransomware is available in two formats: an EXE file format for Windows environments
Analysis of Qilin Ransomware Using Selective Encryption Algorithm (Distributed Targeting Linux, ELF Type)
There has recently been a surge in the tendency for attacks targeting Korean asset and investment management companies. As described in this report, the ransomware encrypts files with an AES symmetric key and then encrypts that AES symmetric key with an RSA public key. This means that the possibility of
Statistics Report of Malware Targeting Linux SSH Servers in Q3 2025
AhnLab SEcurity intelligence Center (ASEC) is using a honeypot to respond to and categorize brute-force and dictionary attacks that target poorly managed Linux SSH servers. This post covers the status of the attack sources identified in logs from the third quarter of 2025 and the statistics of attacks performed by
Linux Kernel Security Update Advisory (CVE-2025-21692)
Overview We have released a security update to address a vulnerability in the Linux kernel. Affected product users are advised to update to the latest version. Affected Products CVE-2025-21692 Linux Kernel Version: 5.6 and later Resolved Vulnerabilities Index Overrange Vulnerability in ETS Qdisc in
Detecting Malware Exploiting Linux PAM through AhnLab EDR
Pluggable Authentication Modules (PAM) is a modular framework that allows applications such as su, sudo, and sshd to perform security policy logic such as authentication without implementing it directly. Applications delegate authentication to the libpam library, which then loads and executes PAM modules according to the configuration information before aggregating
Attacks Targeting Linux SSH Servers to Install SVF DDoS Bot
AhnLab SEcurity intelligence Center (ASEC) is monitoring attacks targeting poorly managed Linux servers by utilizing multiple honeypots. One of the most common honeypots is the SSH service using weak credentials, and a large number of DDoS and CoinMiner threat actors are attacking this service. ASEC has recently identified a case
Sudo Security Update Advisory (CVE-2025-32463)
Overview we have released a security update that addresses a vulnerability in sudo. Users of affected products are advised to update to the latest version. Affected Products CVE-2025-32463 Sudo Versions: 1.9.14 and above and 1.9.17p1 and below Resolved Vulnerabilities Root privilege escalation vulnerability
Analysis of Attacks Targeting Linux SSH Servers for Proxy Installation
AhnLab SEcurity intelligence Center (ASEC) monitors attacks targeting Linux servers that are inappropriately managed using honeypots. One of the representative honeypots is the SSH service that uses weak credentials, which is targeted by a large number of DDoS and coinminer attackers. ASEC has identified cases where Linux servers were attacked
