As usually, @smica83 uploaded a related sample to Bazaar: https://t.co/jt9HqNOAtA Active source u...
Malware sample disguised as BlueBeam Revu installer uploaded to Bazaar.
A malicious executable masquerading as BlueBeam Revu 0295 was discovered hosted on a Backblaze S3 bucket and uploaded to the Bazaar malware repository. The malware is signed with a certificate issued to 'Xiamen Yufeng Tiantai Network Co., Ltd.' by Sectigo, suggesting a supply-chain or certificate abuse vector.
AI summary of the linked source. Not reviewed by an editor. How this works
The lesson from this incident
Full lessonAttackers successfully deployed malware disguised as legitimate BlueBeam Revu software by abusing a valid code signing certificate from Sectigo. The malware was distributed through cloud storage infrastructure (Backblaze S3), demonstrating how supply chain compromises can leverage trusted certificate authorities to bypass security controls. This incident highlights the critical weakness in certificate-based trust models when certificates are compromised or fraudulently obtained. Organizations must implement additional verification layers beyond certificate validation to protect against sophisticated impersonation attacks.
What helps against this
How we list vendors- Endpoint detection and response (EDR and XDR)
Malware and hands-on-keyboard attackers on laptops and servers get spotted and stopped.
- Security awareness training and phishing simulation
People recognise and report attacks instead of falling for them.
- Software supply chain security
Malicious and vulnerable open-source packages are caught before they ship.
Indicators of Compromise
Extracted by AI from the linked source. Not reviewed by an editor. How this works
- url — https://nebraskatigers.s3.us-east-005.backblazeb2.com/bluebeam/BlueBeam_Revu_0295-latest-x64.exe
- domain — backblazeb2.com
- malware — BlueBeam_Revu_0295-latest-x64.exe (trojanized)