---
title: "Crooks found a new way to collaborate using Teams – by hiding command-and-control traffic"
url: https://daily.dev/posts/crooks-found-a-new-way-to-collaborate-using-teams-by-hiding-command-and-control-traffic-c4zhsotyu
source_url: https://www.theregister.com/cyber-crime/2026/06/16/crooks-found-a-new-way-to-collaborate-using-teams-by-hiding-command-and-control-traffic/5256296
type: article
source: "The Register"
published: 2026-06-16T14:45:47.932Z
updated: 2026-06-16T14:46:14.269Z
tags: ["security", "malware", "ransomware"]
reading_time: 4
upvotes: 0
comments: 0
language: en
---

> ## Documentation Index
> Fetch the complete documentation index at: https://daily.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Crooks found a new way to collaborate using Teams – by hiding command-and-control traffic

**[The Register](https://daily.dev/sources/theregister)** · 4 min read · 0 upvotes · 0 comments

## Summary

Cybercriminals have developed custom malware that routes command-and-control traffic through Microsoft Teams, disguising malicious communications as legitimate corporate collaboration activity. This technique makes it significantly harder for security tools to detect and block the malicious traffic, as it blends in with normal enterprise Microsoft 365 usage.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.theregister.com/cyber-crime/2026/06/16/crooks-found-a-new-way-to-collaborate-using-teams-by-hiding-command-and-control-traffic/5256296>

## Similar posts on daily.dev

- [Fake IT bods on Microsoft Teams coax workers into installing malware](https://daily.dev/posts/fake-it-bods-on-microsoft-teams-coax-workers-into-installing-malware-ug5zbhdoi) · The Register · 0 upvotes · 0 comments
- [Ransomware gang abuses Microsoft Teams relays to hide malicious traffic](https://daily.dev/posts/ransomware-gang-abuses-microsoft-teams-relays-to-hide-malicious-traffic-w9qf9jps7) · BleepingComputer · 0 upvotes · 0 comments

---

Tags: [#security](https://daily.dev/tags/security), [#malware](https://daily.dev/tags/malware), [#ransomware](https://daily.dev/tags/ransomware)

[View this post on daily.dev](https://daily.dev/posts/crooks-found-a-new-way-to-collaborate-using-teams-by-hiding-command-and-control-traffic-c4zhsotyu)