Yara Unexpected Go Crypt Exec Process
osquery
Currently running CryptoCoin miner
Description
ODK (osquery-defense-kit) is unique in that the queries are designed to be used as part of a production detection & response pipeline. The detection queries are formulated to return zero rows during normal expected behavior, so that they may be configured to generate alerts when rows are returned.
Query
-- Currently running CryptoCoin miner
--
-- reference:
-- * https://github.com/Neo23x0/signature-base/blob/master/yara/pua_cryptocoin_miner.yar
--
-- tags: persistent
-- interval: 3600
-- platform: posix
SELECT
yara.*,
-- Child
p0.pid AS p0_pid,
p0.path AS p0_path,
p0.name AS p0_name,
p0.start_time AS p0_start,
p0.cmdline AS p0_cmd,
p0.cwd AS p0_cwd,
p0.cgroup_path AS p0_cgroup,
p0.euid AS p0_euid,
p0_hash.sha256 AS p0_sha256,
-- Parent
p0.parent AS p1_pid,
p1.path AS p1_path,
p1.name AS p1_name,
p1.start_time AS p1_start,
p1.euid AS p1_euid,
p1.cmdline AS p1_cmd,
p1_hash.sha256 AS p1_sha256,
-- Grandparent
p1.parent AS p2_pid,
p2.name AS p2_name,
p2.start_time AS p2_start,
p2.path AS p2_path,
p2.cmdline AS p2_cmd,
p2_hash.sha256 AS p2_sha256
FROM
processes p0
JOIN yara ON p0.path = yara.path
LEFT JOIN hash p0_hash ON p0.path = p0_hash.path
LEFT JOIN processes p1 ON p0.parent = p1.pid
LEFT JOIN hash p1_hash ON p1.path = p1_hash.path
LEFT JOIN processes p2 ON p1.parent = p2.pid
LEFT JOIN hash p2_hash ON p2.path = p2_hash.path
WHERE
p0.pid IN (
SELECT
pid
FROM
processes
WHERE
start_time > (strftime('%s', 'now') - 3600)
AND path != ""
GROUP BY
path
)
AND yara.sigrule = '
rule cryptexec {
strings:
$c0 = "crypto/cipher.newCBC" ascii
$c1 = "crypto/aes.newCipher"
$e0 = "os/exec.(*Cmd).Run" ascii
$e1 = "os/exec.Command" ascii
condition:
3 of them
}'
AND yara.count > 0
AND p0.path NOT LIKE "/Users/%/go/bin/%"
AND p0.path NOT LIKE "/home/%/go/bin/%"
AND p0.path NOT LIKE "/Users/%/dev/%"
AND p0.path NOT LIKE "/home/%/dev/%"
AND p0.path NOT LIKE '%docker%'
AND p0.path NOT LIKE '%tailscale%'
AND p0.path NOT LIKE '%terraform%'
AND p0.path NOT LIKE '%rootlesskit%'
AND p0.path NOT LIKE '/opt/homebrew/%'
AND p0.path NOT LIKE '/private/var/folders/%/T/go-build%'
AND p0.name NOT IN (
'buildkit',
'buildkitd',
'cloud_sql_proxy',
'containerd',
'crane',
'op',
'viddy',
'kubectl',
'yay',
'go',
'docker',
'lima-guestagent',
'containerd-star',
'gopls',
'ollama',
'launcher',
'tflint',
'keybase',
'cloud-sql-proxy',
'pprof',
'lens-k8s-proxy',
'rootlesskit',
'snap',
'snapd',
'sourcegraph-backend',
'terraform-ls',
'velociraptor',
'wolfictl'
)
AND p1.name NOT LIKE "%docker%"tags: SStagSS