INDICATOR-COMPROMISE -- Snort detected a system behavior that suggests the system has been affected by malware. That behavior is known as an Indicator of Compromise (IOC). The symptoms could be a wide range of behaviors, from a suspicious file name to an unusual use of a utility. Symptoms do not guarantee an infection; your network configuration may not be affected by malware, but showing indicators as a result of a normal function. In this case, attackers may be attempting to gain privileges and access other systems, spread influence, and make calls and commands with elevated access. The context of the traffic is important to determine intrusion; traffic from an administration utility performing commands on a user's computer is likely not a compromise, but a user laptop accessing a webserver may indicate intrusion.
INDICATOR-COMPROMISE Suspicious .win dns query
This rule looks for any dns query ending in a .win TLD
This rule alerts on dns queries to .win domains, which are commonly used to try and spoof legitimate websites and trick users into thinking they are the original sites.
Attacks/Scans seen in the wild
No known false positives
Cisco Talos Intelligence Group
MITRE::ATT&CK Framework::Enterprise::Command and Control::Application Layer Protocol
None
No information provided
None
Tactic: Initial Access
Technique: Drive-by Compromise
For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org
©2025 Cisco and/or its affiliates. Snort, the Snort and Pig logo are registered trademarks of Cisco. All rights reserved.
