Parrot Traffic Direction System (TDS) Attacks
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A novel Traffic Direction System (TDS), dubbed Parrot TDS, takes advantage of a network of hacked servers that host websites to route victims that fit the required profile to domains used to run scamming schemes or distribute malware. According to the current data, the number of compromised websites has reached 16,500 and counting. Adversaries primarily target legitimate servers, hosting databases, and websites of educational institutions, governmental resources, and X-rated content platforms.
Detect Malicious Activity Associated With Parrot TDS
To detect malicious files planted in your system by Parrot TDS operators, utilize the Sigma-based rule created by our Threat Bounty developer Furkan Celik, who is always on the lookout for emerging threats:
This detection is available for the following SIEM, EDR & XDR platforms: Microsoft Sentinel, Elastic Stack, Splunk, Humio, Sumo Logic, ArcSight, QRadar, FireEye, LogPoint, Graylog, Regex Grep, RSA NetWitness, Chronicle Security, Securonix, Apache Kafka ksqlDB, Carbon Black, Open Distro, and AWS OpenSearch.
The rule is aligned with the latest MITRE ATT&CK® framework v.10, addressing the Command and Control tactic with Remote Access Software (T1219) as the primary technique.
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Campaigns Using Parrot TDS
According to a new report by researchers at Avast, Parrot TDS appeared around October 2021, with the number of campaigns utilizing this tool spiking in February 2022.
Parrot TDS serves as a portal via which more harmful campaigns might reach potential victims. In this scenario, FakeUpdates (also known as SocGholish) alters the appearance of infected sites with JavaScript to display bogus alerts for the browser upgrade, with a required file available for download conveniently at hand. What victims really get is a remote access tool.
When a deceived user visits one of the infected sites, Parrot TDS uses an injected PHP script installed on the compromised website to gather client information and transmit the request to the command-and-control (C2) server, allowing the attacker to execute arbitrary code. The C2 server responds with JavaScript code that runs on the victim’s system and potentially exposing them to further risks. A web shell that provides the adversary persistent remote access to the webserver was also discovered along with the malicious backdoor PHP script. The payload is the NetSupport Client RAT set to run stealthily, granting access to the compromised machine. The mentioned web shell is further copied to multiple locations under almost identical names — hence the “parroting” origin of the TDS’s moniker.
Parrot TDS operators focus their malicious interest on exploiting servers that host WordPress and Joomla-powered websites, unlike its predecessor from early autumn 2020, the TDS tagged Prometheus. In the Prometheus TDS kill chain, threat actors utilized spam emails with an HTML attachment, a Google Docs URL, or a link to a web shell hosted on a hacked server to initiate a vicious process. A malicious URL took victims to a Prometheus PHP backdoor that collected the required information and sent it to the admin panel for the threat actors behind the attacks to decide whether to serve malware directly to the user or divert them to another URL set by the hackers.
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