Excellent CrackmeWe know one can do pretty much everything in Excel spreadsheets, but this...
```
1-Download VolgaCTF_excel_crackme.xlsm2-Remove protections with Advanced Office Password Recovery3-In this file, two data matrices are observed.  3-1-Data Matrice=>	    Cell(100,100):Cell(144,144) =>Matrice1[45*45]  3-2-Calculated Matrice=>  Cell(100,145):Cell(144,145) =>Matrice2[45*1]
4-Matrice1[45*45] * FlagMatrice[45*1]= Matrice2[45*1]
5-FlagMatrice[45*1]=Matrice2 * Invert(Matrice1)
6-use OnlineMathTools.com to To Invert and multiply
7-Change bytes to text and get flag: VolgaCTF{7h3_M057_M47h_cr4ckM3_y0u_3V3R_533N}
```
