APT / THREAT GROUP

WebMonitor RAT

aliases

Last seen:Mar 17, 2026

Intelligence Profile

On its website, Webmonitor RAT is described as 'a very powerful, user-friendly, easy-to-setup and state-of-the-art monitoring tool. Webmonitor is a fully native RAT, meaning it will run on all Windows versions and languages starting from Windows XP and up, and perfectly compatible with all crypters and protectors.'

Unit42 notes in their analysis that it is offered as C2-as-a-service and raises the controversial aspect that the builder allows to create client binaries that will not show any popup or dialogue during installation or while running on a target system.

Threat Analysis

WebMonitor RAT is a known-sophistication threat actor of undetermined national origin, engaged in cyber operations with a primary motivation of unknown activity patterns.

External References

→https://krabsonsecurity.com/2020/09/04/bitrat-pt-2-hidden-browser-socks5-proxy-and-unknownproducts-unmasked/

→https://krebsonsecurity.com/2019/04/whos-behind-the-revcode-webmonitor-rat/

→https://researchcenter.paloaltonetworks.com/2018/04/unit42-say-cheese-webmonitor-rat-comes-c2-service-c2aas/

→https://revcode.se/product/webmonitor/

→https://www.trendmicro.com/vinfo/us/security/news/cybercrime-and-digital-threats/malicious-actors-target-comm-apps-such-as-zoom-slack-discord

Quick Facts

TypeAPT / Threat Group

Aliases3

Also Known As

RevCodewin.webmonitorWebMonitor RAT

External Intelligence

Malpedia: win.webmonitor

Research Links

MITRE ATT&CK VirusTotal Google (news) Twitter/X search

Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.

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