""ET WEB_SERVER Image Content-Type with Obfuscated PHP (Seen with C99 Shell)""
SID: 2015755
Revision: 2
Class Type: attempted-user
Metadata: created_at 2012_10_02, updated_at 2012_10_03, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information
Reference:
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: $HTTP_PORTS
Destination Network: $HTTP_SERVERS
Destination Port: any
Flow: from_server,established
Contents:
-
Value: "Content-Type|3a| image/"
-
Value: "eval(gzinflate(base64_decode("
Within:
PCRE:
Special Options:
-
http_header
-
file_data
-
fast_pattern