147 lines
4.0 KiB
SQL
147 lines
4.0 KiB
SQL
-- Suspicious URL requests by built-in fetching tools (state-based)
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--
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-- refs:
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-- * https://attack.mitre.org/techniques/T1105/ (Ingress Tool Transfer)
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-- * https://attack.mitre.org/techniques/T1571/ (Non-Standard Port)
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--
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-- tags: transient process state
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-- platform: posix
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SELECT
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p.pid,
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p.path,
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p.name,
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p.cmdline,
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REGEX_MATCH (p.cmdline, '(\w+:\/\/.*)\b', 1) AS url,
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REGEX_MATCH (p.cmdline, '//(\d+\.\d+\.\d+\.\d+)[:/]', 1) AS ip,
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REGEX_MATCH (p.cmdline, ':(\d+)', 1) AS port,
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REGEX_MATCH (p.cmdline, '//([\w\-\.]+)[:/]', 1) AS addr,
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REGEX_MATCH (p.cmdline, '//[\w\-\.]+\.(\w+)[:/]', 1) AS tld,
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p.cwd,
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p.euid,
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p.parent,
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p.cgroup_path,
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pp.path AS parent_path,
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pp.name AS parent_name,
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pp.cmdline AS parent_cmdline,
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pp.euid AS parent_euid,
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gp.name AS gparent_name,
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gp.cmdline AS gparent_cmdline,
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pp.pid AS gparent_pid,
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hash.sha256 AS parent_sha256
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FROM
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processes p
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LEFT JOIN processes pp ON p.parent = pp.pid
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LEFT JOIN processes gp ON pp.parent = gp.pid
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LEFT JOIN hash ON pp.path = hash.path
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WHERE
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-- NOTE: Sync remaining portion with sketchy-fetcher-events
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(
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INSTR(p.cmdline, 'wget ') > 0
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OR INSTR(p.cmdline, 'curl ') > 0
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)
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-- Sketchy fetcher events always seem to contain a switch
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AND p.cmdline LIKE '%-%'
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AND p.cmdline LIKE '%/%'
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AND (
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ip NOT IN ('', '127.0.0.1', '::1')
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OR port != ''
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OR tld NOT IN (
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'',
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'app',
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'ca',
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'cloud',
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'com',
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'de',
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'dev',
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'edu',
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'fun',
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'gov',
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'io',
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'md',
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'mil',
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'net',
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'org',
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'se',
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'sh',
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'so',
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'uk'
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)
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OR p.cmdline LIKE '%chmod%'
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OR p.cmdline LIKE '%.onion%'
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OR p.cmdline LIKE '%tor2web%'
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OR p.cmdline LIKE '%aliyun%'
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OR p.cmdline LIKE '%pastebin%'
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OR p.cmdline LIKE '%curl %--user-agent%'
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OR p.cmdline LIKE '%curl -k%'
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OR p.cmdline LIKE '%curl -sL %'
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OR p.cmdline LIKE '%curl%-o-%'
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OR p.cmdline LIKE '%curl%--insecure%'
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OR p.cmdline LIKE '%wget %--user-agent%'
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OR p.cmdline LIKE '%wget %--no-check-certificate%'
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OR p.cmdline LIKE '%curl%--connect-timeout%'
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OR p.cmdline LIKE '%wget -nc%'
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OR p.cmdline LIKE '%wget -t%'
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OR p.cmdline LIKE '%wget -q%'
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OR (
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p.cmdline LIKE '%wget %'
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AND p.euid < 500
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-- TODO: Update this query to understand containers
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AND pp.path NOT IN (
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"/usr/bin/bwrap",
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"/bin/busybox",
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"/usr/bin/melange"
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)
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)
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OR (
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p.cmdline LIKE '%curl %'
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AND p.euid < 500
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AND p.cmdline NOT LIKE "%./configure %--with-curl%"
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)
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)
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-- Exceptions for all calls
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AND pp.name NOT IN ('makepkg') -- Exceptions for non-privileged calls
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AND NOT (
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p.euid > 500
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AND (
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p.cmdline LIKE '%--dump-header%'
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OR p.cmdline LIKE '%/api/v%'
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OR p.cmdline LIKE '%curl -X %'
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OR p.cmdline LIKE '%go mod %'
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OR p.cmdline LIKE '%application/json%'
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OR p.cmdline LIKE '%grpcurl%'
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OR p.cmdline LIKE '%Homebrew%'
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OR p.cmdline LIKE '%Nixpkgs/%'
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OR p.cmdline LIKE '%If-None-Match%'
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OR p.cmdline LIKE '%ctlog%'
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OR p.cmdline LIKE '%.well-known/openid-configuration%'
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OR p.cmdline LIKE '%/openid/v1/jwks%'
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OR p.cmdline LIKE '%--progress-bar%'
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OR parent_cmdline LIKE '%brew.rb%'
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OR parent_cmdline LIKE '%brew.sh%'
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OR parent_cmdline LIKE '/nix/store/%-builder.sh'
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OR p.cmdline LIKE 'git %'
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OR p.cmdline LIKE '%LICENSES/vendor/%'
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OR p.cmdline LIKE 'curl -sL wttr.in%'
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OR p.cmdline LIKE '%localhost:%'
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OR p.cmdline LIKE '%127.0.0.1:%'
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OR p.name IN ('apko')
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)
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)
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-- These are typically curl -k calls
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-- We need the addr "IS NOT NULL" to avoid filtering out
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-- NULL entries
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AND NOT (
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addr IS NOT NULL
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AND (
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addr IN (
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'releases.hashicorp.com',
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'github.com',
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'dl.enforce.dev'
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)
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-- Ignore local addresses (Docker development)
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OR addr NOT LIKE '%.%'
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OR ip LIKE '172.21.%'
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OR ip LIKE '192.168.%'
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)
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)
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