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TeslaCrypt Not Detected


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I had a strange instance happen while testing a ransomware sample against MBAR. The sample was a variant of TeslaCrypt. When the sample was first run on the system, It was detected by MBAR. I then ran the sample a second time to show a co-worker. This time it was not detected, and encrypted files on the system. I have attached the files below for your review.

Malware: TeslaCrypt

MD5: b3c00819cc192c93b295e53cc5df37ce

Virustotal analysis: https://virustotal.com/en/file/8c699e0b4fcaf632fd3c07808da0cc77aad6f219640e00690496a56bfed3b0d6/analysis/



Encrypted File.zip

Malwarebytes Anti-Ransomware.zip


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Hello k1ul3ss:

Thank you kindly for the great data!  Please confirm if the system in question was using Windows 7, 32-bit, and without Service Pack 1.

Besides MBARW Beta6 (v0.9.15.416), what are the details of the other full-time, installed applications that make up that system's defense arsenal?

Thank you again for participating in the beta testing of MBARW.

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