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KRVTZ-NET IDS alerts for 2026-04-23

0
Low
Published: Thu Apr 23 2026 (04/23/2026, 00:00:00 UTC)
Source: CIRCL OSINT Feed
Vendor/Project: tlp
Product: clear

Description

KRVTZ-NET IDS alerts for 2026-04-23

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 05/08/2026, 02:22:50 UTC

Technical Analysis

This event captures IDS alerts indicating reconnaissance and scanning activities on 2026-04-23, involving multiple suspicious IP addresses. Notably, some IPs attempted to exploit a known Fortigate VPN vulnerability (CVE-2023-27997) through repeated GET requests to the /remote/logincheck endpoint. Other indicators include unusual user-agent strings and scanning behavior. No confirmed exploitation or active threat campaigns are documented. Patch availability for the Fortigate VPN vulnerability is not confirmed in this report; users should consult Fortinet advisories. The data represents observational network activity rather than confirmed attacks.

Potential Impact

The impact is limited to detection of reconnaissance and scanning activity without evidence of successful exploitation or active attacks. The presence of attempts targeting a known Fortigate VPN vulnerability suggests potential interest by threat actors, but no confirmed compromises or widespread exploitation are reported. The low severity rating reflects the informational nature of these alerts and absence of confirmed threat actor activity or damage.

Mitigation Recommendations

No specific mitigation guidance or patches are provided in this report. Since no active exploitation or confirmed threat campaigns are reported, no urgent remediation is indicated. Organizations using Fortigate VPN devices should verify and apply vendor advisories and patches for CVE-2023-27997 as appropriate. Continuous monitoring for suspicious login attempts and scanning activity is recommended. Patch status is not confirmed here; consult Fortinet's official advisories for current remediation status.

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Technical Details

Uuid
6061a3af-10dd-41f5-a360-81e0e819473f
Original Timestamp
1776937089

Indicators of Compromise

Ip

ValueDescriptionCopy
ip65.49.1.132
ET EXPLOIT Fortigate VPN - Repeated GET Requests to /remote/logincheck (CVE-2023-27997)
ip47.251.170.102
TGI HUNT Curl to Bare IP Address
ip2001:470:1:332::2
ET EXPLOIT Fortigate VPN - Repeated GET Requests to /remote/logincheck (CVE-2023-27997)
ip129.150.44.188
ET HUNTING Suspicious User-Agent Observed (Mozilla/5.0 (Windows NT XX.X Win64 x64) AppleWebKit/XXX.XX)
ip45.148.10.166
ET SCAN Suspicious User-Agent Containing Security Scan/ner Likely Scan
ip170.106.161.38
ET USER_AGENTS User-Agent (_TEST_)
ip43.166.253.58
ET USER_AGENTS User-Agent (_TEST_)

Threat ID: 69e9eb7f87115cfb68f9c85e

Added to database: 4/23/2026, 9:50:55 AM

Last enriched: 5/8/2026, 2:22:50 AM

Last updated: 6/7/2026, 5:52:17 AM

Views: 66

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