""ET TROJAN Possible Kelihos Infection Executable Download With Malformed Header""
SID: 2018241
Revision: 1
Class Type: trojan-activity
Metadata: created_at 2014_03_09, updated_at 2014_03_09
Reference:
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: $HTTP_PORTS
Destination Network: $HOME_NET
Destination Port: any
Flow: established,from_server
Contents:
-
Value: "Last-Modified|3a|"
-
Value: "MZ"
-
Value: "PE|00 00|"
Within: 4
PCRE: "/^Last-Modified\x3a(?:\s[^\r\n]{2}|[^\r\n\s]{3}),/Dm"
Special Options:
-
http_header
-
file_data
-
fast_pattern