Former Black Basta Members Use Microsoft Teams and Python Scripts in 2025 Attacks Analysis Report

5W1H Analysis

Who

Former affiliates of the Black Basta ransomware group, targeting sectors such as finance, insurance, and construction.

What

A series of cyberattacks using Microsoft Teams phishing methods, Python scripts, and cURL to compromise corporate systems.

When

These attacks are reported to have been carried out in 2025, with publication date marking their disclosure on 11th June 2025.

Where

The attacks primarily focus on the financial, insurance, and construction sectors, likely affecting businesses globally, given the cross-border nature of these industries.

Why

To extract valuable data and potentially hold entities to ransom, exploiting the digital vulnerabilities of major sectors.

How

By using phishing emails via Microsoft Teams and executing Python scripts with cURL commands to infiltrate and manipulate system data.

News Summary

Former members of the Black Basta ransomware gang have launched sophisticated cyberattacks in 2025, using phishing techniques via Microsoft Teams, along with Python scripting and cURL commands. These attacks have predominantly targeted the finance, insurance, and construction industries, with the aim of compromising corporate data and infrastructure.

6-Month Context Analysis

Over the past six months, there has been a consistent rise in cyberattack incidents targeting critical sectors. Groups with similar characteristics to Black Basta have been leveraging advanced scripting and social engineering tactics, exploiting newer digital communication and collaboration platforms. This development is a part of a broader shift towards increased digital threats against corporate environments.

Future Trend Analysis

- Increased utilisation of business communication platforms for phishing attacks. - A growing focus on Python-based hacks, given its versatility in scripting exploits. - Enhanced security focus required for sectors relying heavily on cloud-based communications.

12-Month Outlook

Stakeholders within finance, insurance, and construction will likely heighten cybersecurity protocols and invest in more robust security training. Expect to see an uptick in technology solutions that secure corporate communication tools such as Microsoft Teams.

Key Indicators to Monitor

- Frequency of phishing schemes using corporate communication platforms. - Emergence of new Python-based malware strains. - Changes in cybersecurity spending within high-risk sectors.

Scenario Analysis

Best Case Scenario

Industries swiftly adapt to these emerging threats, implementing advanced security measures and effectively neutralising the risks posed by phishing schemes and Python exploits.

Most Likely Scenario

Continued moderate increase in similar attacks, with periodic successful breaches prompting gradual improvements in cybersecurity policies across sectors.

Worst Case Scenario

A significant breach occurs within a major corporation, resulting in massive financial and reputational losses, thereby escalating global concerns over cyber vulnerabilities.

Strategic Implications

Organisations in targeted sectors should prioritise cybersecurity strategies and invest in state-of-the-art security technology. Emphasis should be placed on internal training to make employees aware of phishing tactics, and infrastructure should be reviewed regularly to reinforce digital fortifications.

Key Takeaways

  • Strengthen security measures for platforms like Microsoft Teams to mitigate phishing risks.
  • Invest in updating cybersecurity protocols, focusing on detecting scripting attacks.
  • Implement robust employee education programmes to recognise social engineering threats.
  • Monitor evolving attack vectors, particularly those involving modern scripting languages.
  • Increase collaboration with cybersecurity experts to enhance threat responsiveness.

Source: Former Black Basta Members Use Microsoft Teams and Python Scripts in 2025 Attacks