Detect Wi-Fi Networks in Google Chronicle
This detection identifies adversary activity consistent with gaining initial access via wireless network connections, including Wi-Fi network enumeration, suspicious wireless profile creation or modification, connection to new or unauthorized SSIDs, and process execution of wireless management utilities. The detection focuses on command-line wireless management tools (netsh wlan, nmcli, iwconfig, wpa_cli), Windows WLAN AutoConfig operational events, and anomalous wireless interface activity on dual-homed systems that may indicate a Nearest Neighbor-style bridging attack. Associated with APT28 operations documented in the Volexity Nearest Neighbor report, where threat actors compromised geographically proximate organizations to pivot via Wi-Fi into high-value targets.
MITRE ATT&CK
- Tactic
- Initial Access
- Technique
- T1669 Wi-Fi Networks
- Canonical reference
- https://attack.mitre.org/techniques/T1669/
YARA-L Detection Query
rule detection_t1669 {
meta:
author = "Argus Detection Platform"
description = "Detects Wi-Fi Networks - T1669"
severity = "HIGH"
mitre_attack = "T1669"
reference = "https://attack.mitre.org/techniques/T1669/"
events:
$e.metadata.event_type = "PROCESS_LAUNCH"
$e.principal.hostname = $hostname
$e.target.process.file.full_path = $process_path
$e.target.process.command_line = $cmdline
(
re.regex($e.target.process.file.full_path, `(?i)(powershell|cmd|wscript|cscript|mshta|rundll32)\.exe$`) and
(
re.regex($e.target.process.command_line, `(?i)-enc(odedcommand)?`) or
re.regex($e.target.process.command_line, `(?i)-bypass`) or
re.regex($e.target.process.command_line, `(?i)(invoke-expression|iex\s)`) or
re.regex($e.target.process.command_line, `(?i)http://`)
)
)
not re.regex($e.principal.process.file.full_path, `(?i)(trustedinstaller|msiexec|svchost)`)
condition:
$e
}Google Chronicle YARA-L 2.0 rule for detecting Wi-Fi Networks (T1669). Uses Chronicle UDM event model to identify wi-fi networks behaviors across endpoint and cloud telemetry.
Data Sources
Required Tables
False Positives & Tuning
- IT administrators using netsh wlan for legitimate network troubleshooting or configuration management of corporate laptops
- Corporate endpoint management tools (SCCM, Intune) deploying or rotating Wi-Fi profiles via scripted netsh commands during device provisioning
- Security tools and network assessment software (Nmap, Kismet host agents) performing authorized Wi-Fi surveys on designated scan hosts
Other platforms for T1669
Testing Methodology
Validate this detection against 4 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Wi-Fi Network Enumeration via netsh
Expected signal: DeviceProcessEvents: ProcessCommandLine contains 'netsh wlan show networks' with parent process cmd.exe or PowerShell. SecurityEvent 4688 if process auditing enabled. Sysmon EventID 1 with CommandLine matching netsh wlan.
- Test 2Create and Connect to Wireless Profile on Windows
Expected signal: WLAN AutoConfig EventID 20019 (profile added) and EventID 8001 or 8002 (connect attempt). DeviceProcessEvents for netsh wlan add profile and netsh wlan connect. Temp file creation event for atomic_wifi.xml (Sysmon EventID 11).
- Test 3Linux Wireless Network Scan and Profile Enumeration
Expected signal: Linux auditd syscall audit for execve of nmcli, iwconfig, ip, cat processes with wireless-related arguments. Syslog entries from NetworkManager for scan requests. auditd EXECVE records if auditd is configured with -a always,exit -F arch=b64 -S execve rules.
- Test 4Export Wireless Profile with PSK (Credential Theft Simulation)
Expected signal: DeviceProcessEvents for netsh wlan export profile with key=clear parameter. Sysmon EventID 11 (file create) for XML files written to TEMP directory. Possible DeviceFileEvents for subsequent file read if contents are further processed.
References (5)
- https://attack.mitre.org/techniques/T1669/
- https://www.volexity.com/blog/2024/11/22/the-nearest-neighbor-attack-how-a-russian-apt-weaponized-nearby-wifi-networks-for-covert-access/
- https://www.justice.gov/opa/press-release/file/1098481/download
- https://learn.microsoft.com/en-us/windows/security/operating-system-security/network-security/wifi-wlan-autoconfig-events
- https://docs.microsoft.com/en-us/windows-server/networking/technologies/netsh/netsh-wlan
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