UnknownPublished 22 Jan 2026

tlp clear · KRVTZ IDS alerts for 2026-01-22

Affects tlp clearSource CIRCL OSINT Feed

TLP:CLEAR, disclosure is not limited

Mentions 2 CVEs

Mentioned vulnerabilities

Description

KRVTZ IDS alerts for 2026-01-22

Impact

For European organizations, the impact of these alerts is primarily related to the potential for initial reconnaissance and exploitation attempts that could lead to unauthorized access or compromise if vulnerabilities are present. The reconnaissance activities, such as scanning with fake Windows NT versions and brute force attempts, may enable attackers to identify weak points in network defenses or credentials. Exploitation attempts against Joomla installations and Fortigate VPN devices could result in remote code execution or unauthorized access, potentially leading to data breaches, service disruption, or lateral movement within networks. Organizations relying on Joomla CMS or Fortigate VPN appliances are particularly at risk if they have not applied relevant security updates or mitigations. The low severity suggests that immediate impact is limited, but these activities could be precursors to more serious attacks. Additionally, the presence of requests to hidden environment files indicates attempts to gather sensitive configuration information, which could facilitate further exploitation. European entities with critical infrastructure or sensitive data may face increased risk if these reconnaissance and exploitation attempts are successful. The lack of known exploits in the wild reduces immediate threat but does not eliminate the risk of future exploitation. Overall, the impact is moderate, emphasizing the importance of proactive defense and monitoring.

Defensive guidance

1. Implement strict network monitoring and intrusion detection to identify and block suspicious IP addresses exhibiting scanning or brute force behaviors, especially those flagged in the KRVTZ alerts. 2. Ensure all Joomla CMS installations are updated to the latest versions and that vulnerable plugins, such as the Simple File Upload Plugin, are removed or patched to mitigate CVE-2011-5148. 3. Apply all available security patches and mitigations for Fortigate VPN devices, particularly addressing CVE-2023-27997, including restricting access to the /remote/logincheck endpoint and enabling multi-factor authentication. 4. Harden submission services against brute force attacks by implementing rate limiting, account lockout policies, and strong password requirements. 5. Conduct regular security audits to identify and secure hidden environment files or sensitive configuration files that could be exposed to inbound requests. 6. Employ threat intelligence feeds to update firewall and IDS/IPS rules dynamically to block known malicious IPs and signatures related to these alerts. 7. Educate security teams to recognize reconnaissance patterns and escalate incidents promptly to prevent escalation to exploitation. 8. Segment networks to limit lateral movement in case of compromise and maintain robust backup and recovery procedures. 9. Use honeypots or deception technologies to detect and analyze attacker behaviors early. 10. Collaborate with national CERTs and cybersecurity agencies to share threat intelligence and receive timely alerts on emerging threats.

Indicators of compromise

IP addresses 15

14.188.41.75ET INFO Unsupported/Fake Windows NT Version 5.0
123.58.210.106haproxy: 123.58.210.106 connecting to (submission/TCP) 15x in hour, possible bruteforcing.
136.158.64.253ET INFO Unsupported/Fake Windows NT Version 5.0
24.101.237.60ET INFO Unsupported/Fake Windows NT Version 5.0
2a01:7e03::2000:f9ff:fed3:b998ET HUNTING Suspicious User-Agent Observed (Mozilla/5.0 (Windows NT XX.X Win64 x64) AppleWebKit/XXX.XX)
20.89.17.172ET WEB_SPECIFIC_APPS Joolma Simple File Upload Plugin Remote Code Execution (CVE-2011-5148)
4.190.200.152ET WEB_SPECIFIC_APPS Joolma Simple File Upload Plugin Remote Code Execution (CVE-2011-5148)
54.241.116.104ET INFO Request to Hidden Environment File - Inbound
103.175.97.32ET INFO Unsupported/Fake Windows NT Version 5.0
2001:ee0:56c0:31c6:c486:d160:4e47:2a38ET INFO Unsupported/Fake Windows NT Version 5.0

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Description

AI analysisMachine-generated, updated 22 Jan 2026, 09:20 UTC

Indicators of compromise

IP addresses 15

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