""ET TROJAN Generic DNS Query for Suspicious CryptoWall (crpt) Domains""
SID: 2020292
Revision: 3
Class Type: misc-activity
Metadata: created_at 2015_01_23, updated_at 2021_11_23
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: "|10|crpt"
Within: 7
PCRE: "/^[a-zA-Z0-9]{12}.onion/R"
Special Options:
- fast_pattern