# ---------------------------------------------------------------
# Core ModSecurity Rule Set ver.2.0.5
# Copyright (C) 2006-2010 Breach Security Inc. All rights reserved.
#
# The ModSecurity Core Rule Set is distributed under GPL version 2
# Please see the enclosed LICENCE file for full details.
# ---------------------------------------------------------------


# The trojan access detection rules detects access to known Trojans already 
# installed on a server. Uploading of Trojans is part of the Anti-Virus rules 
# and uses external Anti Virus program when uploading files.
#
# Detection of Trojans access is especially important in a hosting environment
# where the actual Trojan upload may be done through valid methods and not
# through hacking.
# --
# 
# NOTE Trojans detection is based on checking elements controlled by the client. 
#      A determined attacked can bypass those checks. We are working on 
#      enchaining the checks so it would require a major change in the Trojan
#      to overcome.
#      
# NOTE We found out that Trojan horses are not detected easily by Anti-Virus 
#      software when uploading as the signature set of AV software is not tuned
#      for this purpose. We are working on adding signature tuned to detect
#      Trojans upload to file uploading inspection. 
# 

SecRule REQUEST_HEADERS_NAMES "x_(?:key|file)\b" "phase:2,rev:'2.0.5',t:none,t:lowercase,ctl:auditLogParts=+E,pass,nolog,auditlog,msg:'Backdoor access',id:'950110',tag:'MALICIOUS_SOFTWARE/TROJAN',tag:'WASCTC/WASC-01',tag:'OWASP_TOP_10/A7',tag:'PCI/5.1.1',severity:'2',setvar:'tx.msg=%{rule.msg}',setvar:tx.trojan_score=+1,setvar:tx.anomaly_score=+%{tx.critical_anomaly_score},setvar:tx.%{rule.id}-MALICIOUS_SOFTWARE/TROJAN-%{matched_var_name}=%{matched_var}"
SecRule REQUEST_FILENAME "root\.exe" \
        "phase:2,rev:'2.0.5',t:none,t:urlDecodeUni,t:htmlEntityDecode,t:lowercase,ctl:auditLogParts=+E,pass,nolog,auditlog,msg:'Backdoor access',id:'950921',tag:'MALICIOUS_SOFTWARE/TROJAN',tag:'WASCTC/WASC-01',tag:'OWASP_TOP_10/A7',tag:'PCI/5.1.1',severity:'2',setvar:'tx.msg=%{rule.msg}',setvar:tx.trojan_score=+1,setvar:tx.anomaly_score=+%{tx.critical_anomaly_score},setvar:tx.%{rule.id}-MALICIOUS_SOFTWARE/TROJAN-%{matched_var_name}=%{matched_var}"
SecRule RESPONSE_BODY "(?:<title>[^<]*?(?:\b(?:(?:c(?:ehennemden|gi-telnet)|gamma web shell)\b|imhabirligi phpftp)|(?:r(?:emote explorer|57shell)|aventis klasvayv|zehir)\b|\.::(?:news remote php shell injection::\.| rhtools\b)|ph(?:p(?:(?: commander|-terminal)\b|remoteview)|vayv)|myshell)|\b(?:(?:(?:microsoft windows\b.{0,10}?\bversion\b.{0,20}?\(c\) copyright 1985-.{0,10}?\bmicrosoft corp|ntdaddy v1\.9 - obzerve \| fux0r inc)\.|(?:www\.sanalteror\.org - indexer and read|haxplor)er|php(?:konsole| shell)|c99shell)\b|aventgrup\.<br>|drwxr))" \
        "phase:4,rev:'2.0.5',t:none,ctl:auditLogParts=+E,pass,nolog,auditlog,msg:'Backdoor access',id:'950922',tag:'MALICIOUS_SOFTWARE/TROJAN',tag:'WASCTC/WASC-01',tag:'OWASP_TOP_10/A7',tag:'PCI/5.1.1',severity:'2',setvar:'tx.msg=%{rule.msg}',setvar:tx.trojan_score=+1,setvar:tx.anomaly_score=+%{tx.error_anomaly_score},setvar:tx.%{rule.id}-MALICIOUS_SOFTWARE/TROJAN-%{matched_var_name}=%{matched_var}"