""ET SHELLCODE Unescape Hex Obfuscated Content""
SID: 2013272
Revision: 3
Class Type: shellcode-detect
Metadata: created_at 2011_07_14, performance_impact Significant, updated_at 2024_04_09, 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: $HOME_NET
Destination Port: any
Flow: established,to_client
Contents:
-
Value: "unescape|28|"
-
Value: "|5C|x"
-
Value: "|5C|x"
-
Value: "|5C|x"
-
Value: "|5C|x"
Within: 2
PCRE: "/unescape\x28(\x22|\x27)\x5Cx[a-f,0-9]{2}\x5Cx[a-f,0-9]{2}\x5Cx[a-f,0-9]{2}/smi"
Special Options:
- fast_pattern