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Jayesh kulkarni

About Jayesh Kulkarni

Jayesh is working as a Security Researcher for a couple of years. He likes to reverse binaries and decode encryption of ransomware.

HorseDeal Riding on The Curveball!

 February 5, 2020

Estimated reading time: 5 minutes

It’s surprising to see how quickly attackers make use of new vulnerabilities in malware campaigns. Microsoft recently patched a very interesting vulnerability in their monthly Patch Tuesday update for January 2020. It’s a spoofing vulnerability in Windows CryptoAPI (Crypt32.dll) validation mechanism for Elliptic Curve Cryptography (ECC) certificates. An attacker could...

STOP (Djvu) Ransomware: Ransom For Your Shady Habits!

 January 15, 2020

Estimated reading time: 9 minutes

With almost 200 extensions, STOP (djvu) ransomware can be said to be 2019’s most active and widespread ransomware. Although this ransomware was active a year before, it started its campaign aggressively in early 2019. To evade detection, it has been continuously changing its extensions and payloads. For earlier infections, data...