Password Spray Many Users from Same IP Microsoft Defender for Identity
Detects multiple authentication failures across several user accounts originating from a single IP address, as identified by Microsoft Defender for Identity. This pattern is indicative of a password spraying attack where an attacker attempts common passwords against multiple users to gain unauthorized access.
CQL · Falcon Next-Gen SIEMCopy query
#Vendor = "microsoft"
| #event.module = "defender-identity"
| Vendor.category = "AdvancedHunting-IdentityLogonEvents"
| Vendor.properties.LogonType = "Failed logon"
| groupBy([source.address], function=[count(as=total_failures),count(field=user.name, distinct=true, as=unique_users),collect(fields=user.name),collect(fields=Vendor.properties.DestinationDeviceName),min(@timestamp, as=start_time),max(@timestamp, as=end_time)])
| unique_users > 10
| time_diff_min := (end_time - start_time) / 60000
| time_diff_min <= 30
| start_time_fmt := formatTime("%Y-%m-%d %H:%M:%S", field=start_time, timezone="UTC")
| end_time_fmt := formatTime("%Y-%m-%d %H:%M:%S", field=end_time, timezone="UTC")
| drop([start_time, end_time])
| sort([unique_users], order=desc)Detects multiple authentication failures across several user accounts originating from a single IP address, as identified by Microsoft Defender for Identity. This pattern is indicative of a password spraying attack where an attacker attempts common passwords against multiple users to gain unauthorized access.
password_spray_many_users_from_same_ip_microsoft_defender_for_identity.yml
T1110.003
Kundan Kumar
Detection
Identity
Identity
2026-05-08
2026-05-08
