iSID Analyst Knowledge Base

Definitions, and additional context on iSID alerts along with helpful recommendations

SERVER-OTHER Apache Log4j logging remote code execution attempt

the alert detects attempts to exploit the Apache Log4j vulnerability for remote code execution. The rule matches on HTTP requests containing the string ${jndi: in the URI. The rule generates an alert when such traffic is detected flowing towards the server on an established connection. This rule helps to identify potential attempts to exploit the known Apache Log4j vulnerabilities and can aid in mitigating the risks associated with this critical security issue.

SERVER-OTHER Apache Log4j logging remote code execution attempt

the alert detects attempts to exploit the Apache Log4j vulnerability for remote code execution. The rule matches on HTTP requests containing the string ${jndi: in the URI. The rule generates an alert when such traffic is detected flowing towards the server on an established connection. This rule helps to identify potential attempts to exploit the known Apache Log4j vulnerabilities and can aid in mitigating the risks associated with this critical security issue.

SERVER-OTHER Apache Log4j logging remote code execution attempt

the alert detects attempts to exploit the Apache Log4j vulnerability for remote code execution. The rule matches on HTTP requests containing the string ${jndi: in the URI. The rule generates an alert when such traffic is detected flowing towards the server on an established connection. This rule helps to identify potential attempts to exploit the known Apache Log4j vulnerabilities and can aid in mitigating the risks associated with this critical security issue.

NF – Request for PNG file but sending binary file

The rule detects a scenario where an HTTP server responds to a request for a JPG file with a binary file that contains the string "This program cannot be run in DOS mode." This type of response may indicate that an exe was sent under a cover of a picture and might point on a malicius activity

NF – Request for JPG file but sending binary file

The rule detects a scenario where an HTTP server responds to a request for a JPG file with a binary file that contains the string "This program cannot be run in DOS mode." This type of response may indicate that an exe was sent under a cover of a picture and might point on a malicius activity