CTF
- Name : SwampCTF 2019
- Website : swampctf.com
- Type : Online
- Format : Jeopardy
- CTF Time : link
50 - Leap of Faith - Stego
“You have to let it all go, Neo. Fear, doubt, and disbelief. Free your mind (and your stego tools).” - Morpheus, probably
-= Challenge by P4PA_0V3RL0RD =-
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| $ exiftool leap_of_faith.jpeg ExifTool Version Number : 11.30 File Name : leap_of_faith.jpeg Directory : . File Size : 41 kB File Modification Date/Time : 2019:04:07 00:18:02+02:00 File Access Date/Time : 2019:04:07 00:18:18+02:00 File Inode Change Date/Time : 2019:04:07 00:18:02+02:00 File Permissions : rw-r--r-- File Type : JPEG File Type Extension : jpg MIME Type : image/jpeg Exif Byte Order : Little-endian (Intel, II) X Resolution : 72 Y Resolution : 72 Resolution Unit : inches Modify Date : 2019:04:04 09:22:27 Exif Version : 0210 Date/Time Original : 2019:04:04 09:22:27 Flashpix Version : 0100 Color Space : Uncalibrated Thumbnail Offset : 226 Thumbnail Length : 25217 Image Width : 720 Image Height : 480 Encoding Process : Baseline DCT, Huffman coding Bits Per Sample : 8 Color Components : 3 Y Cb Cr Sub Sampling : YCbCr4:2:0 (2 2) Image Size : 720x480 Megapixels : 0.346 Thumbnail Image : (Binary data 25217 bytes, use -b option to extract)
$ exiftool -b -ThumbnailImage leap_of_faith.jpeg > thumb.jpg
|
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| $ exiftool thumb.jpg ExifTool Version Number : 11.30 File Name : thumb.jpg Directory : . File Size : 25 kB File Modification Date/Time : 2019:04:07 00:28:12+02:00 File Access Date/Time : 2019:04:07 00:28:12+02:00 File Inode Change Date/Time : 2019:04:07 00:28:12+02:00 File Permissions : rw-r--r-- File Type : JPEG File Type Extension : jpg MIME Type : image/jpeg Exif Byte Order : Little-endian (Intel, II) X Resolution : 72 Y Resolution : 72 Resolution Unit : inches Modify Date : 2019:04:04 09:23:36 Exif Version : 0210 Date/Time Original : 2019:04:04 09:23:36 Flashpix Version : 0100 Color Space : Uncalibrated Thumbnail Offset : 226 Thumbnail Length : 5199 Image Width : 334 Image Height : 302 Encoding Process : Baseline DCT, Huffman coding Bits Per Sample : 8 Color Components : 3 Y Cb Cr Sub Sampling : YCbCr4:2:0 (2 2) Image Size : 334x302 Megapixels : 0.101 Thumbnail Image : (Binary data 5199 bytes, use -b option to extract)
$ exiftool -b -ThumbnailImage thumb.jpg > thumb_thumb.jpg
|
flag{FR33_Y0UR_M1ND}
Note: stego is not forensics
50 - Last Transmission - Stego
Two of our squad leaders got beamed up before they could finish their transmission, but they left a clue behind as to where they were taken.
-= Created by P4PA_0V3RL0RD =-
Original image:
Blue 0 plane:
Red 1 plane:
flag{B34M_M3_UP_SC077Y}