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-rw-r--r--rules/regexp/compromised_hosts.lua223
1 files changed, 223 insertions, 0 deletions
diff --git a/rules/regexp/compromised_hosts.lua b/rules/regexp/compromised_hosts.lua
new file mode 100644
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--- /dev/null
+++ b/rules/regexp/compromised_hosts.lua
@@ -0,0 +1,223 @@
+local reconf = config['regexp']
+local rspamd_regexp = require 'rspamd_regexp'
+local util = require 'rspamd_util'
+
+reconf['HAS_PHPMAILER_SIG'] = {
+ -- PHPMailer 6.0.0 and older used hex hash in boundary:
+ -- boundary="b1_2a45d5e29f78d3408e318878b049f474"
+ -- Since 6.0.1 it uses base64 (without =+/):
+ -- boundary="b1_uBN0UPD3n6RU04VPxI54tENiDgaCGoh15l9s73oFnlM"
+ -- boundary="b1_Ez5tmpb4bSqknyUZ1B1hIvLAfR1MlspDEKGioCOXc"
+ -- https://github.com/PHPMailer/PHPMailer/blob/v6.4.0/src/PHPMailer.php#L2660
+ re = [[X-Mailer=/^PHPMailer /H || Content-Type=/boundary="b1_[0-9a-zA-Z]+"/H]],
+ description = "PHPMailer signature",
+ group = "compromised_hosts"
+}
+
+reconf['PHP_SCRIPT_ROOT'] = {
+ re = "X-PHP-Originating-Script=/^0:/Hi",
+ description = "PHP Script executed by root UID",
+ score = 1.0,
+ group = "compromised_hosts"
+}
+
+reconf['HAS_X_POS'] = {
+ re = "header_exists('X-PHP-Originating-Script')",
+ description = "Has X-PHP-Originating-Script header",
+ group = "compromised_hosts"
+}
+
+reconf['HAS_X_PHP_SCRIPT'] = {
+ re = "header_exists('X-PHP-Script')",
+ description = "Has X-PHP-Script header",
+ group = "compromised_hosts"
+}
+
+-- X-Source:
+-- X-Source-Args: /usr/sbin/proxyexec -q -d -s /var/run/proxyexec/cagefs.sock/socket /bin/cagefs.server
+-- X-Source-Dir: silvianimberg.com:/public_html/wp-content/themes/ultimatum
+reconf['HAS_X_SOURCE'] = {
+ re = "header_exists('X-Source') || header_exists('X-Source-Args') || header_exists('X-Source-Dir')",
+ description = "Has X-Source headers",
+ group = "compromised_hosts"
+}
+
+-- X-Authenticated-Sender: accord.host-care.com: sales@cortaflex.si
+rspamd_config.HAS_X_AS = {
+ callback = function(task)
+ local xas = task:get_header('X-Authenticated-Sender')
+ if not xas then
+ return false
+ end
+ local _, _, auth = xas:find('[^:]+:%s(.+)$')
+ if auth then
+ -- TODO: see if we can parse an e-mail address from auth
+ -- and see if it matches the from address or not
+ return true, auth
+ else
+ return true
+ end
+ end,
+ description = 'Has X-Authenticated-Sender header',
+ group = "compromised_hosts",
+ score = 0.0
+}
+
+-- X-Get-Message-Sender-Via: accord.host-care.com: authenticated_id: sales@cortaflex.si
+rspamd_config.HAS_X_GMSV = {
+ callback = function(task)
+ local xgmsv = task:get_header('X-Get-Message-Sender-Via')
+ if not xgmsv then
+ return false
+ end
+ local _, _, auth = xgmsv:find('authenticated_id: (.+)$')
+ if auth then
+ -- TODO: see if we can parse an e-mail address from auth
+ -- and see if it matches the from address or not.
+ return true, auth
+ else
+ return true
+ end
+ end,
+ description = 'Has X-Get-Message-Sender-Via: header',
+ group = "compromised_hosts",
+ score = 0.0,
+}
+
+-- X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
+-- X-AntiAbuse: Primary Hostname - accord.host-care.com
+-- X-AntiAbuse: Original Domain - swaney.com
+-- X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12]
+-- X-AntiAbuse: Sender Address Domain - dropbox.com
+reconf['HAS_X_ANTIABUSE'] = {
+ re = "header_exists('X-AntiAbuse')",
+ description = "Has X-AntiAbuse headers",
+ group = "compromised_hosts"
+}
+
+reconf['X_PHP_EVAL'] = {
+ re = [[X-PHP-Script=/eval\(\)'d code/H || X-PHP-Originating-Script=/eval\(\)'d code/H]],
+ description = "Message sent using eval'd PHP",
+ score = 4.0,
+ group = "compromised_hosts"
+}
+
+reconf['HAS_WP_URI'] = {
+ re = '/\\/wp-[^\\/]+\\//Ui',
+ description = "Contains WordPress URIs",
+ one_shot = true,
+ group = "compromised_hosts"
+}
+
+reconf['WP_COMPROMISED'] = {
+ re = '/\\/wp-(?:content|includes)[^\\/]+\\//Ui',
+ description = "URL that is pointing to a compromised WordPress installation",
+ one_shot = true,
+ group = "compromised_hosts"
+}
+
+reconf['PHP_XPS_PATTERN'] = {
+ re = 'X-PHP-Script=/^[^\\. ]+\\.[^\\.\\/ ]+\\/sendmail\\.php\\b/Hi',
+ description = "Message contains X-PHP-Script pattern",
+ group = "compromised_hosts"
+}
+
+reconf['HAS_XAW'] = {
+ re = "header_exists('X-Authentication-Warning')",
+ description = "Has X-Authentication-Warning header",
+ group = "compromised_hosts"
+}
+
+-- X-Authentication-Warning: localhost.localdomain: www-data set sender to info@globalstock.lv using -f
+reconf['XAW_SERVICE_ACCT'] = {
+ re = "X-Authentication-Warning=/\\b(?:www-data|anonymous|ftp|apache|nobody|guest|nginx|web|www) set sender to\\b/Hi",
+ description = "Message originally from a service account",
+ score = 1.0,
+ group = "compromised_hosts"
+}
+
+reconf['ENVFROM_SERVICE_ACCT'] = {
+ re = "check_smtp_data('from',/^(?:www-data|anonymous|ftp|apache|nobody|guest|nginx|web|www)@/i)",
+ description = "Envelope from is a service account",
+ score = 1.0,
+ group = "compromised_hosts"
+}
+
+reconf['HIDDEN_SOURCE_OBJ'] = {
+ re = "X-PHP-Script=/\\/\\..+/Hi || X-PHP-Originating-Script=/(?:^\\d+:|\\/)\\..+/Hi || X-Source-Args=/\\/\\..+/Hi",
+ description = "UNIX hidden file/directory in path",
+ score = 2.0,
+ group = "compromised_hosts"
+}
+
+local hidden_uri_re = rspamd_regexp.create_cached('/(?!\\/\\.well[-_]known\\/)(?:^\\.[A-Za-z0-9]|\\/' ..
+ '\\.[A-Za-z0-9]|\\/\\.\\.\\/)/i')
+rspamd_config.URI_HIDDEN_PATH = {
+ callback = function(task)
+ local urls = task:get_urls(false)
+ if (urls) then
+ for _, url in ipairs(urls) do
+ if (not (url:is_subject() and url:is_html_displayed())) then
+ local path = url:get_path()
+ if (hidden_uri_re:match(path)) then
+ -- TODO: need url:is_schemeless() to improve this
+ return true, 1.0, url:get_text()
+ end
+ end
+ end
+ end
+ end,
+ description = 'Message contains URI with a hidden path',
+ score = 1.0,
+ group = 'compromised_hosts',
+}
+
+reconf['MID_RHS_WWW'] = {
+ re = "Message-Id=/@www\\./Hi",
+ description = "Message-ID from www host",
+ score = 0.5,
+ group = "compromised_hosts"
+}
+
+rspamd_config.FROM_SERVICE_ACCT = {
+ callback = function(task)
+ local re = rspamd_regexp.create_cached('/^(?:www-data|anonymous|ftp|apache|nobody|guest|nginx|web|www)@/i');
+ -- From
+ local from = task:get_from(2)
+ if (from and from[1]) then
+ if (re:match(from[1].addr)) then
+ return true
+ end
+ end
+ -- Sender
+ local sender = task:get_header('Sender')
+ if sender then
+ local s = util.parse_mail_address(sender, task:get_mempool())
+ if (s and s[1]) then
+ if (re:match(s[1].addr)) then
+ return true
+ end
+ end
+ end
+ -- Reply-To
+ local replyto = task:get_header('Reply-To')
+ if replyto then
+ local rt = util.parse_mail_address(replyto, task:get_mempool())
+ if (rt and rt[1]) then
+ if (re:match(rt[1].addr)) then
+ return true
+ end
+ end
+ end
+ end,
+ description = "Sender/From/Reply-To is a service account",
+ score = 1.0,
+ group = "compromised_hosts"
+}
+
+reconf['WWW_DOT_DOMAIN'] = {
+ re = "From=/@www\\./Hi || Sender=/@www\\./Hi || Reply-To=/@www\\./Hi || check_smtp_data('from',/@www\\./i)",
+ description = "From/Sender/Reply-To or Envelope is @www.domain.com",
+ score = 0.5,
+ group = "compromised_hosts"
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 15:38:16 +0000