Update README.md

Hidden-tear/README.md

@@ -3,6 +3,19 @@ Open Source Ransomware
 
 Uploaded to GitHub for those who want to analyze the code.
 
+### References
+
+- https://www.tripwire.com/state-of-security/security-data-protection/cyber-security/hidden-tear-project-forbidden-fruit-is-the-sweetest/
+- http://blog.trendmicro.com/trendlabs-security-intelligence/new-open-source-ransomwar-based-on-hidden-tear-and-eda2-may-target-businesses/
+- https://securelist.com/blog/research/73565/hidden-tear-and-its-spin-offs/
+- https://www.utkusen.com/blog/destroying-the-encryption-of-hidden-tear-ransomware.html
+- https://blog.gdatasoftware.com/2016/11/29289-it-s-educational-on-the-no-1-argument-for-open-source-ransomware
+- https://www.bleepingcomputer.com/news/security/hidden-tear-ransomware-developer-blackmailed-by-malware-developers-using-his-code/
+- http://www.securityweek.com/variants-spawn-hidden-tear-ransomware
+
+
+### 
+
 
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