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- --[[
- Copyright (c) 2022, Vsevolod Stakhov <vsevolod@rspamd.com>
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
- ]]--
-
-
- local reconf = config['regexp']
-
- reconf['HTML_META_REFRESH_URL'] = {
- -- Requires options { check_attachements = true; }
- re = '/<meta\\s+http-equiv="refresh"\\s+content="\\d+\\s*;\\s*url=/{sa_raw_body}i',
- description = "Has HTML Meta refresh URL",
- score = 5.0,
- one_shot = true,
- group = 'HTML'
- }
-
- reconf['HAS_DATA_URI'] = {
- -- Requires options { check_attachements = true; }
- re = '/data:[^\\/]+\\/[^; ]+;base64,/{sa_raw_body}i',
- description = "Has Data URI encoding",
- group = 'HTML',
- one_shot = true,
- }
-
- reconf['DATA_URI_OBFU'] = {
- -- Requires options { check_attachements = true; }
- re = '/data:text\\/(?:plain|html);base64,/{sa_raw_body}i',
- description = "Uses Data URI encoding to obfuscate plain or HTML in base64",
- group = 'HTML',
- one_shot = true,
- score = 2.0
- }
-
- reconf['INTRODUCTION'] = {
- re = '/\\b(?:my name is\\b|(?:i am|this is)\\s+(?:mr|mrs|ms|miss|master|sir|prof(?:essor)?|d(?:octo)?r|rev(?:erend)?)(?:\\.|\\b))/{sa_body}i',
- description = "Sender introduces themselves",
- score = 2.0,
- one_shot = true,
- group = 'scams'
- }
-
- -- Message contains a link to a .onion URI (Tor hidden service)
- local onion_uri_v2 = '/[a-z0-9]{16}\\.onion?/{url}i'
- local onion_uri_v3 = '/[a-z0-9]{56}\\.onion?/{url}i'
- reconf['HAS_ONION_URI'] = {
- re = string.format('(%s | %s)', onion_uri_v2, onion_uri_v3),
- description = 'Contains .onion hidden service URI',
- score = 0.0,
- group = 'experimental'
- }
-
- local my_victim = [[/(?:victim|prey)/{words}]]
- local your_webcam = [[/webcam/{words}]]
- local your_onan = [[/(?:mast[ur]{2}bati(?:on|ng)|onanism|solitary)/{words}]]
- local password_in_words = [[/^pass(?:(?:word)|(?:phrase))$/i{words}]]
- local btc_wallet_address = [[has_symbol(BITCOIN_ADDR)]]
- local wallet_word = [[/^wallet$/{words}]]
- local broken_unicode = [[has_flag(bad_unicode)]]
- local list_unsub = [[header_exists(List-Unsubscribe)]]
- local x_php_origin = [[header_exists(X-PHP-Originating-Script)]]
-
- reconf['LEAKED_PASSWORD_SCAM_RE'] = {
- re = string.format('%s & (%s | %s | %s | %s | %s | %s | %s | %s | %s)',
- btc_wallet_address, password_in_words, wallet_word,
- my_victim, your_webcam, your_onan,
- broken_unicode, 'lua:check_data_images',
- list_unsub, x_php_origin),
- description = 'Contains BTC wallet address and malicious regexps',
- functions = {
- check_data_images = function(task)
- local tp = task:get_text_parts() or {}
-
- for _,p in ipairs(tp) do
- if p:is_html() then
- local hc = p:get_html()
-
- if hc and hc:has_property('data_urls') then
- return true
- end
- end
- end
-
- return false
- end
- },
- score = 0.0,
- group = 'scams'
- }
-
- rspamd_config:register_dependency('LEAKED_PASSWORD_SCAM', 'BITCOIN_ADDR')
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