""ET INFO DYNAMIC_DNS Query to a Suspicious *.dns-free.ru Domain""
SID: 2022384
Revision: 3
Class Type: bad-unknown
Metadata: created_at 2016_01_20, former_category HUNTING, updated_at 2020_09_17
Reference:
Protocol: udp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: 53
Flow:
Contents:
-
Value: "|01|" Depth: 1 Offset: 2
-
Value: "|00 01 00 00 00 00 00|"
-
Value: "|07|dns-free|03|com"
Within: 7
PCRE:
Special Options:
-
fast_pattern
-
nocase