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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"
}
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