Threat ID 411977850 created 2021-06-11 13:58:04 (UTC)

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Threat ID 411977850 created 2021-06-11 13:58:04 (UTC)

L1 Bithead

We are investigating alerts of this DNS signature for

I'd expect that a match for a clear text string in a DNS Request that it is very unlikely this is a false detection.

However to get alerts so quickly after this signature creation, suggests we are either very unlucky or  a very common public internet resource if causing this fly-by access. Anyone else receiving this threat alert shortly after an apparent WF update.





L0 Member

We have seen alert for as IOC for revil ransomware, although not seen anywhere else. Just chrome communicating to this domain. Still validating with support on this.

L7 Applicator

This is a benign Let's encrypt domain. The URL categorization has been cleared.

There was an issue that was resolved in 9.0.10-h2, 9.1.6, and 10.0.2, that caused URL's previously in a malicious category to get 'stuck' in that malicious category in the Firewall's DP Cache. See

If you are running a PAN-OS version that is higher than the ones mentioned above, and you see the URL categorization stuck in a malicious category, even after it being cleared out to be Benign (verifiable in Test-A-Site), please open a Support case to have the issue investigated for root cause.

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