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DETECTION OVERVIEW

Unusual Archive File Download

Risk Factors

When a victim downloads an archive file, there is a risk that the file contains malware. Attackers can leverage malware to support their operations, such as maintaining control of compromised devices, evading defenses, and running commands to achieve attack campaign objectives.

The system might change the risk score for this detection based on device importance.

Kill Chain

Caution

Risk Score

60

Detection diagram
Next in Caution: Unusual Executable File Download

Attack Background

The system detects most forms of archive files, including these file types:

CAB (Cabinet), which is affiliated with Microsoft Windows

ZIP, which is supported by many operating systems

7z, which is an open-source file format

RAR (Roshal Archive), which is a proprietary archive format

GZ (GNU Zip), which is an open-source file format

TAR (Tape Archive), which is affiliated with Unix systems

Mitigation Options

Quarantine the device while checking for indicators of compromise, such as malware
Configure firewalls to block inbound traffic from suspicious external hosts
Implement network segmentation, security zones, and firewall policies that limit how devices can communicate

MITRE ATT&CK ID

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