```Lone_Author_Writeup```Trying to open zip file threw an error. So I examined its headers. They should look like PK\x03\x04 or PK\x05\x06 or PK\x07\x08. However they are PKF\x03\x04. In the next occurance of PK, the letter immediate to PK is l and so on. They are as follows```PKFPKlPKaPKgPK{PKMPK3PK3PKtPK_MPK3PK_1```It is evident that we are in right direction. We got first part of flag as "Flag{M33t_M3_1. Removed these extra chars from file and saved it as lone_fixed.zip. Ran binwalk on lone_fixed.zip and it found 0.zip,"qr_ps.tif", 0e68542470, secret.zip. secret.zip and 0.zip are had an image with name "export.png" and we need password to unlock it.```han@kali:~/Desktop/ctf/asd/la » binwalk -e lone_fixed.zip 
DECIMAL       HEXADECIMAL     DESCRIPTION--------------------------------------------------------------------------------0             0x0             Zip archive data, at least v2.0 to extract, compressed size: 8001, uncompressed size: 156370, name: qr_ps.tif8068          0x1F84          Zip archive data, at least v2.0 to extract, compressed size: 29, uncompressed size: 32, name: 0e685424708165          0x1FE5          Zip archive data, at least v1.0 to extract, compressed size: 11132, uncompressed size: 11132, name: secret.zip19343         0x4B8F          End of Zip archive```file 0e68542470 hinted to look at .tiff```han@kali:~/Desktop/ctf/asd/la/_lone_fixed.zip.extracted » cat 0e68542470 Man, you have to this this TIFF!%     ```It looked like a partial qr code. Then I examined exifdata of the file and found password for both zip files in author comments of exifdata as "0xNOX**". Use it to extract the image "export.png" and it has second part of flag```han@kali:~/Desktop/ctf/asd/la/_lone_fixed.zip.extracted » exiftool qr_ps.tif                                  1 ↵ExifTool Version Number         : 10.65File Name                       : qr_ps.tifDirectory                       : .File Size                       : 153 kBFile Modification Date/Time     : 2018:03:21 12:18:49-04:00File Access Date/Time           : 2018:03:26 03:38:16-04:00File Inode Change Date/Time     : 2018:03:21 12:18:49-04:00File Permissions                : rwxrwxrwxFile Type                       : TIFFFile Type Extension             : tifMIME Type                       : image/tiffExif Byte Order                 : Little-endian (Intel, II)Subfile Type                    : Full-resolution ImageImage Width                     : 175Image Height                    : 175Bits Per Sample                 : 8 8 8 8Compression                     : UncompressedPhotometric Interpretation      : RGBStrip Offsets                   : 33870Orientation                     : Horizontal (normal)Samples Per Pixel               : 4Rows Per Strip                  : 175Strip Byte Counts               : 122500X Resolution                    : 72Y Resolution                    : 72Planar Configuration            : ChunkyResolution Unit                 : inchesSoftware                        : Adobe Photoshop CC 2015 (Windows)Modify Date                     : 2018:03:21 17:04:04Extra Samples                   : Associated AlphaXMP Toolkit                     : Image::ExifTool 10.75Format                          : image/tiffAuthor                          : Password to the second part is 0xNOX**Color Mode                      : RGBCreate Date                     : 2018:03:21 16:53:01+01:00Creator Tool                    : Adobe Photoshop CC 2015 (Windows)Metadata Date                   : 2018:03:21 17:04:04+01:00Derived From Document ID        : xmp.did:2af6b33f-3c7b-a24b-9843-1996a1b84602Derived From Instance ID        : xmp.iid:3f770dda-d0ca-a143-b15f-e83cc237e3e5Derived From Original Document ID: xmp.did:0697a83c-7578-eb46-9563-317a5fd69d58Document ID                     : adobe:docid:photoshop:73c987be-2d21-11e8-b06c-dfbcca89ae7aHistory Action                  : created, saved, saved, converted, derived, saved, saved, converted, derived, savedHistory Instance ID             : xmp.iid:0697a83c-7578-eb46-9563-317a5fd69d58, xmp.iid:481c4c0f-3e35-6445-b934-e4c85439f5c1, xmp.iid:a626861d-83ab-2741-bffa-670135153615, xmp.iid:2af6b33f-3c7b-a24b-9843-1996a1b84602, xmp.iid:3f770dda-d0ca-a143-b15f-e83cc237e3e5, xmp.iid:ff12e802-eabc-8546-abc4-fd24b1476556History Software Agent          : Adobe Photoshop CC 2015 (Windows), Adobe Photoshop CC 2015 (Windows), Adobe Photoshop CC 2015 (Windows), Adobe Photoshop CC 2015 (Windows), Adobe Photoshop CC 2015 (Windows), Adobe Photoshop CC 2015 (Windows)History When                    : 2018:03:21 16:53:01+01:00, 2018:03:21 17:01:41+01:00, 2018:03:21 17:03:52+01:00, 2018:03:21 17:03:52+01:00, 2018:03:21 17:04:04+01:00, 2018:03:21 17:04:04+01:00History Changed                 : /, /, /, /, /History Parameters              : from image/png to application/vnd.adobe.photoshop, converted from image/png to application/vnd.adobe.photoshop, from application/vnd.adobe.photoshop to image/tiff, converted from application/vnd.adobe.photoshop to image/tiffInstance ID                     : xmp.iid:ff12e802-eabc-8546-abc4-fd24b1476556Original Document ID            : xmp.did:0697a83c-7578-eb46-9563-317a5fd69d58IPTC Digest                     : 00000000000000000000000000000000Displayed Units X               : inchesDisplayed Units Y               : inchesPrint Style                     : CenteredPrint Position                  : 0 0Print Scale                     : 1Alpha Channels Names            : TransparencyGlobal Angle                    : 30Global Altitude                 : 30URL List                        : Slices Group Name               : Num Slices                      : 1Pixel Aspect Ratio              : 1Photoshop Thumbnail             : (Binary data 3889 bytes, use -b option to extract)Has Real Merged Data            : YesWriter Name                     : Adobe PhotoshopReader Name                     : Adobe Photoshop CC 2015Color Space                     : UncalibratedExif Image Width                : 175Exif Image Height               : 175Image Source Data               : (Binary data 19892 bytes, use -b option to extract)Image Size                      : 175x175Megapixels                      : 0.031
```![Alt text](_lone_fixed.zip.extracted/export.png?raw=true "export.png")
Fina flag is : Flag{M33t_M3_1n_tHe_p4RK_T0mOrrOW}