题目

给出一个mp3文件

解题

右键->selection->save selection->另存为xxx.png即可
8750d5109208213f

E:\逐鹿\MISC\tools\MP3Stego_1_1_19\MP3Stego>.\decode -X cipher.mp3
MP3StegoEncoder 1.1.19
See README file for copyright info
Input file = 'cipher.mp3'  output file = 'cipher.mp3.pcm'
Will attempt to extract hidden information. Output: cipher.mp3.txt
Enter a passphrase:
Confirm your passphrase: *
the bit stream file cipher.mp3 is a BINARY file
HDR: s=FFF, id=1, l=3, ep=off, br=9, sf=0, pd=1, pr=0, m=3, js=0, c=0, o=0, e=0
alg.=MPEG-1, layer=III, tot bitrate=128, sfrq=44.1
mode=single-ch, sblim=32, jsbd=32, ch=1
[Frame  791]Frame cannot be located
Input stream may be empty
Avg slots/frame = 418.907; b/smp = 2.91; br = 128.290 kbps
Decoding of "cipher.mp3" is finished
The decoded PCM output file name is "cipher.mp3.pcm"

E:\逐鹿\MISC\tools\MP3Stego_1_1_19\MP3Stego>

┌──(holyeyes㉿kali2023)-[~/Misc/tool-misc/zsteg]
└─$ zsteg cipher.png   
b1,r,lsb,xy         .. file: Zip archive data, at least v2.0 to extract, compression method=deflate                                                       
b1,rgb,msb,xy       .. file: BS image, Version 0, Quantization 64624, (Decompresses to 3640 words)                                                        ┌──(holyeyes㉿kali2023)-[~/Misc/tool-misc/zsteg]
└─$ zsteg -e 'b1,r,lsb,xy' cipher.png > cipher.zip┌──(holyeyes㉿kali2023)-[~/Misc/tool-misc/zsteg]
└─$ foremost cipher.png 
Processing: cipher.png
|*|

     
ROT47
input:
2lO,.j2lL000iZZ2[2222iWP,.ZQQX,2.[002iZZ2[2020iWP,.ZQQX,2.[020iZZ2[2022iWLNZQQX,2.[2202iW2,2.ZQQX,2.[022iZZ2[2220iWPQQZQQX,2.[200iZZ2[202iZZ2[2200iWLNZQQX,2.[220iZZ2[222iZZ2[2000iZZ2[2002iZZ2Nj2]20lW2]20l2ZQQX,2]202.ZW2]02l2]20,2]002.XZW2]22lW2]2ZQQX,2]002.XZWWP2XZQQX,2]022.ZW2]00l2]20,2]220.XZW2]2lWPQQZQQX,2]002.XZW2]0lWPQQZQQX,2]020.XZ2]20,2]202.Z2]00Z2]02Z2]2j2]22l2]2ZWPQQZQQX,2]022.Z2]00Z2]0Z2]2Z2]22j2]2lW2]000X,2]20.,2]20.j2]2W2]2W2]22ZQ-QQZ2]2020ZWP,.ZQQX,2]020.Z2]2220ZQ--QZ2]002Z2]220Z2]020Z2]00ZQW---Q--QZ2]002Z2]000Z2]200ZQ--QZ2]002Z2]000Z2]002ZQ--QZ2]002Z2]020Z2]022ZQ--QZ2]002Z2]000Z2]022ZQ--QZ2]002Z2]020Z2]200ZQ--QZ2]002Z2]000Z2]220ZQLQZ2]2222Z2]2000Z2]000Z2]2002Z2]222Z2]020Z2]202Z2]222Z2]2202Z2]220Z2]2002Z2]2002Z2]2202Z2]222Z2]2222Z2]2202Z2]2022Z2]2020Z2]222Z2]2220Z2]2002Z2]222Z2]2020Z2]002Z2]202Z2]2200Z2]200Z2]2222Z2]2002Z2]200Z2]2022Z2]200ZQN---Q--QZ2]200Z2]000ZQXjQZQ-QQXWXXWXj
output:
a=~[];a={___:++a,aaaa:(![]+"")[a],__a:++a,a_a_:(![]+"")[a],_a_:++a,a_aa:({}+"")[a],aa_a:(a[a]+"")[a],_aa:++a,aaa_:(!""+"")[a],a__:++a,a_a:++a,aa__:({}+"")[a],aa_:++a,aaa:++a,a___:++a,a__a:++a};a.a_=(a.a_=a+"")[a.a_a]+(a._a=a.a_[a.__a])+(a.aa=(a.a+"")[a.__a])+((!a)+"")[a._aa]+(a.__=a.a_[a.aa_])+(a.a=(!""+"")[a.__a])+(a._=(!""+"")[a._a_])+a.a_[a.a_a]+a.__+a._a+a.a;a.aa=a.a+(!""+"")[a._aa]+a.__+a._+a.a+a.aa;a.a=(a.___)[a.a_][a.a_];a.a(a.a(a.aa+"\""+a.a_a_+(![]+"")[a._a_]+a.aaa_+"\\"+a.__a+a.aa_+a._a_+a.__+"(\\\"\\"+a.__a+a.___+a.a__+"\\"+a.__a+a.___+a.__a+"\\"+a.__a+a._a_+a._aa+"\\"+a.__a+a.___+a._aa+"\\"+a.__a+a._a_+a.a__+"\\"+a.__a+a.___+a.aa_+"{"+a.aaaa+a.a___+a.___+a.a__a+a.aaa+a._a_+a.a_a+a.aaa+a.aa_a+a.aa_+a.a__a+a.a__a+a.aa_a+a.aaa+a.aaaa+a.aa_a+a.a_aa+a.a_a_+a.aaa+a.aaa_+a.a__a+a.aaa+a.a_a_+a.__a+a.a_a+a.aa__+a.a__+a.aaaa+a.a__a+a.a__+a.a_aa+a.a__+"}\\\"\\"+a.a__+a.___+");"+"\"")())();

DASCTF{f8097257d699d7fdba7e97a15c4f94b4}