HOMETHREATSr77
APT / THREAT GROUP

r77

3
aliases
Last seen:Mar 17, 2026

Intelligence Profile

According to the author, r77 is a ring 3 rootkit that hides everything:

* Files, directories

* Processes & CPU usage

* Registry keys & values

* Services

* TCP & UDP connections

* Junctions, named pipes, scheduled tasks

Threat Analysis

r77 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://github.com/bytecode77/r77-rootkit
→https://harfanglab.io/insidethelab/unpacking-packxor/
→https://twitter.com/malmoeb/status/1523179260273254407
→https://www.securonix.com/blog/analyzing-obscurebat-threat-actors-lure-victims-into-executing-malicious-batch-scripts-to-deploy-stealthy-rootkits

Quick Facts

TypeAPT / Threat Group
Aliases3

Also Known As

win.r77r77r77 Rootkit

External Intelligence

Malpedia: win.r77

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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