Rule Category

FILE-EXECUTABLE -- Snort detected traffic targeting vulnerabilites that are found in or delivered through executable files, regardless of platform. In those instances, Snort is able to correct traffic that has been altered.

Alert Message

FILE-EXECUTABLE Microsoft Windows Defender buffer overflow attempt

Rule Explanation

The rule tries to find the shellcode or offsets that are used by the exploit to calculate the Windows API offsets.

What To Look For

The rule detects an executable then might try to exploit CVE-2021-1647 in MS Windows defender.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic: Lateral Movement

Technique: Application Deployment Software

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org

Additional Links

Rule Vulnerability

Buffer Overflow

Buffer Overflows occur when a memory location is filled past its expected boundaries. Computer attackers target systems without proper terminating conditions on buffers, which then write the additional information in other locations in memory, overwriting what is there. This could corrupt the data, making the system behave erratically or crash. The new information could include malicious executable code, which might be executed.

CVE Additional Information