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medium advisory

KRVTZ-NET IDS Alerts Analysis: Network Scanning and Exploitation Attempts

Multiple IDS alerts indicate potential network reconnaissance, vulnerability exploitation attempts targeting Fortigate VPN (CVE-2023-27997), and ColdFusion servers originating from various IP addresses on March 13, 2026.

On March 13, 2026, KRVTZ-NET IDS systems generated a series of alerts indicative of network scanning and attempted exploitation. The alerts highlight suspicious activity originating from a range of IP addresses, suggesting a widespread campaign rather than a targeted attack from a single actor. Specific alerts include repeated GET requests to /remote/logincheck, potentially targeting the Fortigate VPN vulnerability CVE-2023-27997, as well as requests for hidden environment files and attempts…

Detection coverage 3

Detect Suspicious User Agent Strings

medium

Detects requests with suspicious user agent strings such as '_TEST_' and 'InfoBot'.

sigma tactics: discovery techniques: T1595.001 sources: web, apache|nginx|iis

Detect ColdFusion Componentutils Access

high

Detects access to the ColdFusion componentutils endpoint, potentially indicating vulnerability exploitation attempts.

sigma tactics: initial_access techniques: T1190 sources: web, apache|nginx|iis

Detect Request to Hidden Environment File

medium

Detects requests to hidden environment files (.env) indicating potential information leakage attempt.

sigma tactics: discovery techniques: T1592 sources: web, apache|nginx|iis

Detection queries are kept inside the platform. Get full rules →

Indicators of compromise

13

ip