Egress Network Connection from RPM Package

[rule]
description = """
This rule monitors for egress network connections from processes that are executed from an RPM package parent. Attackers
can backdoor an RPM package to establish initial access, or install a malicious RPM package to maintain persistence.
"""
id = "d20cd4ba-ff65-4e1c-8012-4241d449b16b"
license = "Elastic License v2"
name = "Egress Network Connection from RPM Package"
os_list = ["linux"]
version = "1.0.13"

query = '''
sequence with maxspan=3s
  [process where event.type == "start" and event.action == "exec" and
   process.parent.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish") and
   process.parent.args : "/var/tmp/rpm-tmp.*" and not (
     (process.name == "curl" and process.command_line like ("*.microsoft.com/api/report*", "*check.percona.com*")) or
     process.executable in ("/sbin/runuser", "/usr/sbin/runuser") or
     process.working_directory like~ (
       "/builds/packages/naudit-repos", "/disco_flowlytics/docker/overlay2/*", "/builddir/build/BUILD/librdkafka-*/mklove/deps/src/libzstd"
     ) or
     process.args : ("/usr/local/cpanel/3rdparty/wp-toolkit/*", "/usr/bin/rpmkeys") or
     (process.executable == "/bin/sudo" and process.args in (
       "https://global.endpoint.security.micro",
       "https://global.endpoint.security.micros"
       )
     ) or
     (process.name == "curl" and process.args == "sudo" and process.args == "mdatp" and process.args == "--cacert") or
     process.command_line like "runuser -u mdatp*" or
     process.name == "sudo"
   )
  ] by process.entity_id
  [network where event.type == "start" and event.action == "connection_attempted" and not (
     destination.ip == null or
     destination.ip == "0.0.0.0" or
     cidrmatch(
       destination.ip, "10.0.0.0/8", "127.0.0.0/8", "169.254.0.0/16", "172.16.0.0/12", "192.0.0.0/24", "192.0.0.0/29",
       "192.0.0.8/32", "192.0.0.9/32", "192.0.0.10/32", "192.0.0.170/32", "192.0.0.171/32", "192.0.2.0/24",
       "192.31.196.0/24", "192.52.193.0/24", "192.168.0.0/16", "192.88.99.0/24", "224.0.0.0/4", "100.64.0.0/10",
       "192.175.48.0/24","198.18.0.0/15", "198.51.100.0/24", "203.0.113.0/24", "240.0.0.0/4", "::1", "FE80::/10",
       "FF00::/8", "172.31.0.0/16"
       ) or
      process.executable in (
      "/opt/cisco/amp/bin/ampinsthelper", "/usr/libexec/platform-python", "/sbin/update-pciids",
      "/etc/nginx/ea-nginx/config-scripts/global/config-scripts-global-cloudflare",
      "/opt/kerio/GFIAgent/GFIAgentInstaller", "/usr/share/centrifydc/libexec/adinfo",
      "/opt/teleport/system/bin/tsh"
      ) or
      process.executable like "/usr/local/cpanel/3rdparty/perl/*/bin/perl"
    )
  ] by process.parent.entity_id
'''

min_endpoint_version = "8.6.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1195"
name = "Supply Chain Compromise"
reference = "https://attack.mitre.org/techniques/T1195/"
[[threat.technique.subtechnique]]
id = "T1195.002"
name = "Compromise Software Supply Chain"
reference = "https://attack.mitre.org/techniques/T1195/002/"



[threat.tactic]
id = "TA0001"
name = "Initial Access"
reference = "https://attack.mitre.org/tactics/TA0001/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1543"
name = "Create or Modify System Process"
reference = "https://attack.mitre.org/techniques/T1543/"

[[threat.technique]]
id = "T1546"
name = "Event Triggered Execution"
reference = "https://attack.mitre.org/techniques/T1546/"
[[threat.technique.subtechnique]]
id = "T1546.016"
name = "Installer Packages"
reference = "https://attack.mitre.org/techniques/T1546/016/"


[[threat.technique]]
id = "T1574"
name = "Hijack Execution Flow"
reference = "https://attack.mitre.org/techniques/T1574/"


[threat.tactic]
id = "TA0003"
name = "Persistence"
reference = "https://attack.mitre.org/tactics/TA0003/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1071"
name = "Application Layer Protocol"
reference = "https://attack.mitre.org/techniques/T1071/"


[threat.tactic]
id = "TA0011"
name = "Command and Control"
reference = "https://attack.mitre.org/tactics/TA0011/"

[internal]
min_endpoint_version = "8.6.0"