Suspicious Startup Persistence via a Windows Installer

[rule]
description = """
Identifies when the Windows installer process msiexec.exe creates a new persistence entry via the Run key or Startup
folder and set to run a suspicious commands or file type.
"""
id = "9f7aece1-355c-4e72-a7ea-767d5cccb12d"
license = "Elastic License v2"
name = "Suspicious Startup Persistence via a Windows Installer"
os_list = ["windows"]
version = "1.0.5"

query = '''
any where process.name : "msiexec.exe" and
  (
   (event.category == "registry" and event.action == "modification" and
    registry.path : ("H*\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\*",
                     "H*\\Software\\WOW6432Node\\Microsoft\\Windows\\CurrentVersion\\Run\\*",
                     "H*\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\Run\\*",
                     "H*\\Software\\WOW6432Node\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\Run\\*") and
    registry.data.strings : ("*C:\\Users*\\*\\Contacts\\*", "*cmd*/c*", "*powershell*", "*node.exe*.js*", "*rundll32*",
                             "*mshta.exe*", "*wscript.exe*", "*cscript.exe*", "*C:\\Users\\Public\\*") and
    not registry.data.strings :
                  ("rundll32.exe \"?:\\Program Files\\VMware\\VMware View\\Agent\\bin\\MessageFrameWork.dll\",EnvSyncW",
                   "rundll32.exe ?:\\PROGRA~1\\Omnissa\\Horizon\\Agent\\bin\\MESSAG~1.DLL,EnvSyncW",
                   "rundll32.exe \"?:\\Program Files\\Omnissa\\Horizon\\Agent\\bin\\MessageFrameWork.dll\",EnvSyncW",
                   "rundll32.exe DR*Svc.dll,EntryPointUserMessage",
                   "rundll32.exe DR*SVC.dll, EntryPointUserMessage",
                   "rundll32.exe P*Svc.dll, EntryPointUserMessage",
                   "rundll32.exe DRV*.dll,EntryPointUserMessage",
                   "rundll32.exe P*.dll,EntryPointUserMessage",
                   "C:\\Users\\Public\\RES\\RESPrinter\\FileWatcher.exe")) or

    (event.category == "file" and event.action == "creation" and
     file.extension in~ ("bat", "cmd", "js", "vbs", "wsh", "hta", "exe", "pif", "scr", "cpl", "jse", "vbe", "ps1") and
     file.path : ("?:\\programdata\\microsoft\\windows\\start menu\\programs\\startup\\*",
                  "?:\\Users\\*\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\*"))
  )
'''

min_endpoint_version = "8.4.0"
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0
tree = true

[[optional_actions]]
action = "rollback"
field = "process.entity_id"
state = 0

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1547"
name = "Boot or Logon Autostart Execution"
reference = "https://attack.mitre.org/techniques/T1547/"
[[threat.technique.subtechnique]]
id = "T1547.001"
name = "Registry Run Keys / Startup Folder"
reference = "https://attack.mitre.org/techniques/T1547/001/"



[threat.tactic]
id = "TA0003"
name = "Persistence"
reference = "https://attack.mitre.org/tactics/TA0003/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1218"
name = "System Binary Proxy Execution"
reference = "https://attack.mitre.org/techniques/T1218/"
[[threat.technique.subtechnique]]
id = "T1218.007"
name = "Msiexec"
reference = "https://attack.mitre.org/techniques/T1218/007/"



[threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"

[internal]
min_endpoint_version = "8.4.0"