diff --git a/malware-analysis_ref_and_memo.md b/malware-analysis_ref_and_memo.md
index e6b7388..bfe6ccd 100644
--- a/malware-analysis_ref_and_memo.md
+++ b/malware-analysis_ref_and_memo.md
@@ -20,7 +20,7 @@ DFIR,マルウェア解析，OSINTに特化したUbuntuベースのディスト
 |IDA pro|〇|〇(Not free)|〇||||||
 |Binary Ninja|〇||||||||
 |Cutter|〇|r2dec,r2ghidra|native<br>gdb<br>windbg<br>etc.|[INTRO TO CUTTER FOR MALWARE ANALYSIS(2019-03)](https://malwology.com/2019/03/14/intro-to-cutter-for-malware-analysis/)<br>[megabeets.net](https://www.megabeets.net/?s=cutter)<br>[Cutter: Presenting r2ghidra Decompiler,r2con 2019](https://www.youtube.com/watch?v=eHtMiezr7l8&list=LLTk6-mAiILdt3V27uab14LA&index=8&t=0s)|||||
-|Ghidra|〇|〇||[Reversing WannaCry Part 2 - Diving into the malware with #Ghidra,youtube](https://www.youtube.com/watch?v=Q90uZS3taG0)|||||
+|Ghidra|〇|〇||[Reversing WannaCry Part 2 - Diving into the malware with #Ghidra,youtube](https://www.youtube.com/watch?v=Q90uZS3taG0)<br>[cheetsheet](https://www.oldergeeks.com/downloads/file.php?id=2767)|||||
 |x64/x32dbg|〇|Snowman|〇||||||
 |WinDbg|〇||〇||||||
 |GDB|〇||〇||||||