Intrusion Prevention Alert (Packet dropped)

Hi guys, I keep getting the following alert and just wondered if it was anything to worry about / look further into:

Intrusion Prevention Alert

An intrusion has been detected. The packet has been dropped automatically.

You can toggle this rule between "drop" and "alert only" in WebAdmin.

 Details about the intrusion alert:

 Message........: INDICATOR-COMPROMISE Suspicious .trade dns query

Details........: https://www.snort.org/search?query=44076

Time...........: 2017-10-19 14:29:01

Packet dropped.: yes

Priority.......: low

Classification.: Misc activity

IP protocol....: 17 (UDP)

Source IP address: **.*.*.** (ad.domain.zone) Source port: 55525 Destination IP address: 8.8.8.8 (google-public-dns-a.google.com) Destination port: 53 (domain)

Sophos UTM @

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System Uptime     : 35 days 10 hours 25 minutes

System Load       : 0.35

System Version     : Sophos UTM 9.503-4

Please refer to the manual for detailed instructions.