T1498.002sub-technique of T1498 Network Denial of Service
Reflection Amplification
Windows · IaaS · Linux · macOSnothing on this site yetT1498.002 on attack.mitre.org
Adversaries may attempt to cause a denial of service (DoS) by reflecting a high-volume of network traffic to a target. This type of Network DoS takes advantage of a third-party server intermediary that hosts and will respond to a given spoofed source IP address. This third-party server is commonly termed a reflector. An adversary accomplishes a reflection attack by sending packets to reflectors with the spoofed address of the victim.
If this is happening now
Checklists and playbooks to open while the alert is still live.
Playbook for this stage
Ransomware, suspected or confirmed
Files renamed or unreadable, a ransom note, or backup deletion commands seen.
how MITRE says to see it
Detection Strategy for Reflection Amplification DoS (T1498.002)
- Outbound spoofed traffic to known amplification protocols (e.g., DNS, NTP, Memcached) combined with abnormal network traffic volume targeting remote reflectors, resulting in disproportionate traffic returned to a victim
- Spoofed outbound packets sent to amplification services from command-line tools or scripts, combined with abnormal outbound packet volume on known reflector ports
- Command-line initiated UDP traffic bursts to external reflection amplification ports using built-in scripting or binaries with network anomalies
- Cloud-hosted VM or container generates spoofed UDP requests to third-party services on known amplifier ports, with high outbound-to-inbound traffic ratios in VPC Flow Logs
what reduces it
- M1037 Filter Network Traffic. When flood volumes exceed the capacity of the network connection being targeted, it is typically necessary to intercept the incoming traffic upstream to filter out the attack traffic from the legitimate traffic. Such defenses can be provided by the hosting Internet Service Provider (ISP) or by a 3rd party such as a Content Delivery Network (CDN) or providers specializing in DoS mitigations.