06-11-2021 09:42 AM
We are investigating alerts of this DNS signature for x1.c.lencr.org.
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.
06-14-2021 10:19 PM
Looks like a false positive to me, I can't see why that particular Let'sEncrypt domain is flagged as malicious.
06-15-2021 04:41 AM
Did you happen to see additional events to x1.c.lencr.org late last evening until early this morning (12:33am ET to 1:08am ET)? We saw them the first time during the time you posted in your original post.
06-15-2021 06:03 AM
Since the update (2021-06-11) to malware this has caused significant malware alerts. To my knowledge there hasn't been any help desk tickets that parts of the internet isn't working.... Has anyone reached out to #Unit42 for an explanation?
06-15-2021 07:35 AM - edited 06-15-2021 07:56 AM
Yeah we got bombarded by a few thousand all at once in that timeframe, I have them set to ignore until I see any evidence to suggest that they're something I should actually be concerned about.
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