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Xctf mobile--app1 problem solving

2022-07-03 12:39:00 【Passers by. Hello】

1. take apk Drag in jadx in

2. stay BuildConfig find versionname and versioncode

3. take versionname convert to ASCLL code , And 15 Exclusive or 

str = "X<cP[?PHNB<P?aj" 
for i in str:   
    sum = ord(i)^15  
    print(chr(sum),end='')

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