Rule Category

OS-WINDOWS -- Snort has detected traffic targeting vulnerabilities in a Windows-based operating system. This does not include browser traffic or other software on the OS, but attacks against the OS itself. (such as?)

Alert Message

OS-WINDOWS Microsoft Windows GDI privilege escalation attempt

Rule Explanation

The rule is looking for following hex string value in the file downloaded by PC ``` |66 0F 7F 44 24 50 66 0F 6F 05 72 11 00 00 66 0F 7F 44 24 70 66 0F 6F 05 54 11 00 00 48 89 44 24 28 48 8D 44 24 40 66 0F 7F 84 24 90 00 00 00 66| ```

What To Look For

The rule alerts when PC tries to download executable that can exploit CVE-2020-1529 and cause escalation of privilege

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic: Privilege Escalation

Technique: Exploitation for Privilege Escalation

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

Additional Links

Rule Vulnerability

Memory Corruption

Memory Corruption is any vulnerability that allows the modification of the content of memory locations in a way not intended by the developer. Memory corruption results are inconsistent; they could lead to fatal errors and system crashes or data leakage; some have no effect at all.

CVE Additional Information