Rule Category

FILE-OTHER -- Snort detected traffic targeting vulnerabilities in a file type that does not require enough rule coverage to have its own category.

Alert Message

FILE-OTHER Microsoft .NET API XPS file parsing remote code execution attempt

Rule Explanation

The rule is looking for following malicious compressed content of `FixedDocumentSequence.fdseq` file inside a XPS file. ``` |77 90 22 C5 8A 0B 88 5E 7D B8 50 B5 EA 7A 38 BC 51 AD F1 B5 DA 24 A4 FC 87 E1 6C 94 DD 0 F 25 59| ```

What To Look For

The rule alerts when clients attempts to download malicious XPS file. This XPS file can cause remote code execution by exploiting CVE-2020-0605

Known Usage

No public information

False Positives

No known false positives


Cisco Talos Intelligence Group

Rule Groups

No rule groups


Additional Links

Rule Vulnerability

Insecure Deserialization

Insecure Deserialization relates to web application security. Applications turn an object into data through serialization; the reverse of that process, deserialization, can be vulnerable to attacks when the application trusts the data that is being deserialized. Serialized data is machine readable and not encrypted; serialized user-supplied data should not be trusted. Deserialization attacks can lead to remote code execution.

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.
Loading description

MITRE ATT&CK Framework

Tactic: Execution

Technique: User Execution

For reference, see the MITRE ATT&CK vulnerability types here: