""ET WEB_CLIENT Exchange Webshell CnC Domain in DNS Lookup""
SID: 2032345
Revision: 2
Class Type: attempted-admin
Metadata: created_at 2021_03_29, updated_at 2021_03_29
Reference:
Protocol: udp
Source Network: $HOME_NET
Source Port: any
Destination Network: any
Destination Port: 53
Flow:
Contents:
-
Value: "|01|" Depth: 1 Offset: 2
-
Value: "|00 01 00 00 00 00 00|"
-
Value: "|05|brian|0f|krebsonsecurity|03|top|00|"
Within: 27
PCRE:
Special Options:
-
nocase
-
fast_pattern