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Tyler McGraw@Rapid7 Cybersecurity Blog
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The BlackSuit ransomware group is continuing its campaign of social engineering attacks, a tactic that cybersecurity experts believe they adopted from the Black Basta ransomware group. This shift in tactics comes after Rapid7 observed a significant decrease in social engineering attacks attributed to Black Basta since late December 2024, possibly indicating a change in Black Basta's operations due to internal conflicts or other factors. BlackSuit's persistence in employing social engineering highlights the ongoing threat landscape where ransomware groups readily adapt and evolve their methods to maximize their success in breaching target networks.
The social engineering tactics employed by BlackSuit echo those previously used by Black Basta, including email bombing and Microsoft Teams phishing. According to a report from ReliaQuest in June 2025, attackers have recently begun incorporating Python scripts alongside these techniques, utilizing cURL requests to retrieve and deploy malicious payloads. This demonstrates an increasing sophistication in their approach, aimed at establishing persistent access to targeted systems and evading traditional security measures. These attacks often masquerade as legitimate communications, such as help desk personnel, to trick unsuspecting users into divulging sensitive information or executing malicious code.
ReliaQuest's findings reveal that a substantial portion of Teams phishing attacks originated from onmicrosoft[.]com domains or breached domains, making it difficult to distinguish malicious traffic from legitimate network activity. The affected sectors include finance, insurance, and construction. This transition towards more sophisticated and stealthy methods poses a significant challenge to organizations, as they must enhance their detection capabilities to identify and mitigate these evolving threats effectively.
ImgSrc: blog.rapid7.com
References :
The social engineering tactics employed by BlackSuit echo those previously used by Black Basta, including email bombing and Microsoft Teams phishing. According to a report from ReliaQuest in June 2025, attackers have recently begun incorporating Python scripts alongside these techniques, utilizing cURL requests to retrieve and deploy malicious payloads. This demonstrates an increasing sophistication in their approach, aimed at establishing persistent access to targeted systems and evading traditional security measures. These attacks often masquerade as legitimate communications, such as help desk personnel, to trick unsuspecting users into divulging sensitive information or executing malicious code.
ReliaQuest's findings reveal that a substantial portion of Teams phishing attacks originated from onmicrosoft[.]com domains or breached domains, making it difficult to distinguish malicious traffic from legitimate network activity. The affected sectors include finance, insurance, and construction. This transition towards more sophisticated and stealthy methods poses a significant challenge to organizations, as they must enhance their detection capabilities to identify and mitigate these evolving threats effectively.
ImgSrc: blog.rapid7.com
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References :
- Rapid7 Cybersecurity Blog: BlackSuit Continues Social Engineering Attacks in Wake of Black Basta’s Internal Conflict
- BlackFog: BlackSuit Ransomware: How It Works and Who’s Behind It
Classification:
- HashTags: #BlackSuit #Ransomware #SocialEngineering
- Company: Rapid7
- Target: Various organizations
- Attacker: BlackSuit
- Product: Ransomware
- Feature: Social Engineering
- Malware: BlackSuit
- Type: Ransomware
- Severity: Medium