{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/remote-access-trojan/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":[],"_cs_severities":["critical"],"_cs_tags":["remote-access-trojan","rat","antivirus","detection","malware","windows"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eThis threat brief focuses on the detection of numerous malicious Remote Access Tools (RATs) via Antivirus (AV) solutions, as identified by a SigmaHQ rule published on 2026-07-01. The rule targets a wide array of commonly abused RATs, including well-known malware families like AgentTesla, AsyncRAT, NanoCore, Quasar, and Remcos, among others. The presence of these tools on an endpoint, even if immediately blocked by AV, is a critical security event that demands immediate and thorough investigation. Such an alert signifies that an attacker has likely achieved initial access and attempted to establish persistent remote control, making it imperative to understand the delivery mechanism and scope of compromise beyond the simple AV remediation. This detection is crucial for identifying early stages of compromise and preventing further malicious activity.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003cp\u003e(The provided source focuses on a detection signature for post-compromise activity, rather than detailing a specific attack chain. Therefore, a generic attack chain cannot be accurately described without speculative information.)\u003c/p\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eIf Remote Access Tools successfully bypass antivirus defenses and become fully operational, they grant attackers comprehensive control over compromised systems. This can lead to severe consequences including, but not limited to, extensive data exfiltration, installation of additional malware such as ransomware or credential stealers, persistent unauthorized access, lateral movement across the network, and complete disruption of organizational operations. Even when an antivirus successfully blocks a RAT, the initial alert indicates a successful delivery attempt that must be investigated to determine the initial access vector and prevent future attacks. The impact of such successful compromise can range from significant financial losses due to data breaches or ransomware, to reputational damage and regulatory penalties.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDeploy the \u003ccode\u003eAntivirus - Remote Access Tools Signature\u003c/code\u003e Sigma rule to your SIEM/EDR to ensure immediate visibility into AV alerts flagging known malicious RATs.\u003c/li\u003e\n\u003cli\u003eInvestigate all alerts generated by the \u003ccode\u003eAntivirus - Remote Access Tools Signature\u003c/code\u003e rule. Focus on identifying the initial access vector that led to the RAT's presence on the system.\u003c/li\u003e\n\u003cli\u003eReview network logs for suspicious outbound connections from systems where \u003ccode\u003eSignature\u003c/code\u003e events related to tools like \u003ccode\u003eAgentTesla\u003c/code\u003e or \u003ccode\u003eAsyncRAT\u003c/code\u003e were detected.\u003c/li\u003e\n\u003cli\u003eEnsure endpoint protection solutions are up-to-date and configured to report \u003ccode\u003eantivirus\u003c/code\u003e category events to your centralized logging platform.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-03T14:03:51Z","date_published":"2026-07-03T14:03:51Z","id":"https://feed.craftedsignal.io/briefs/2026-07-av-remote-access-tools/","summary":"This brief details a Sigma rule designed to detect Antivirus alerts flagging various malicious Remote Access Tools (RATs) such as AgentTesla, AsyncRAT, and NanoCore, highlighting the critical need for investigation into the initial infection vector even when the AV blocks the threat.","title":"Detection of Malicious Remote Access Tools by Antivirus","url":"https://feed.craftedsignal.io/briefs/2026-07-av-remote-access-tools/"}],"language":"en","title":"CraftedSignal Threat Feed - Remote-Access-Trojan","version":"https://jsonfeed.org/version/1.1"}