diff --git a/malware-analysis_ref_and_memo.md b/malware-analysis_ref_and_memo.md
index ca4e16a..0909cad 100644
--- a/malware-analysis_ref_and_memo.md
+++ b/malware-analysis_ref_and_memo.md
@@ -8,7 +8,6 @@
|IDA pro|〇|〇(Not free)|〇||||||
|Binary Ninja|〇||||||||
|Cutter|〇|r2dec,r2ghidra|native
gdb
windbg
etc.|[INTRO TO CUTTER FOR MALWARE ANALYSIS(2019-03)](https://malwology.com/2019/03/14/intro-to-cutter-for-malware-analysis/)
[megabeets.net](https://www.megabeets.net/?s=cutter)
[Cutter: Presenting r2ghidra Decompiler,r2con 2019](https://www.youtube.com/watch?v=eHtMiezr7l8&list=LLTk6-mAiILdt3V27uab14LA&index=8&t=0s)
-|||||
|Ghidra|〇|〇|||||||
|x64/x32dbg|〇|Snowman|〇||||||
|WinDbg|〇||〇||||||