DoubleS1405 CTF 2017 Writeup
DoubleS1405 CTF 2017にHarekazeとして参加しました。 チームの総得点は881点でした。
[Misc 1]Mic Check
Problem
flag{W3lc0me_T0_DoubleS1405_CTF!}
FLAG: W3lc0me_T0_DoubleS1405_CTF!
[Misc 50] Instead of 5 billion won, I give you a cute handcuffs.
Problem
In the fall of 2016, an e-mail arrived to detective Kim, who is tracking up economic fugitives who have shed large amounts of money from a large corporation.
I know the location of the perpetrator, but I can not tell you, and if you pay me 5 billion, I was attached with a photograph that would tell you the exact location.
The attached photo was taken nearest to his refuge.
Can Kim find out where the shooter escaped?
(The correct answer is the address in Korea. Example: 52-3, Yeonsan-dong, Yeonje-gu, Busan, Republic of Korea)
—- File Info —-
ctf% exiftool 1.JPG ExifTool Version Number : 10.40 File Name : 1.JPG Directory : . File Size : 5.1 MB File Modification Date/Time : 2017:03:25 12:50:02+09:00 File Access Date/Time : 2017:03:25 12:51:43+09:00 File Inode Change Date/Time : 2017:03:25 12:50:10+09:00 File Permissions : rw-r--r-- File Type : JPEG File Type Extension : jpg MIME Type : image/jpeg Exif Byte Order : Big-endian (Motorola, MM) Make : Apple Camera Model Name : iPhone 6s Orientation : Rotate 180 X Resolution : 72 Y Resolution : 72 Resolution Unit : inches Software : 9.3.2 Modify Date : 2016:11:06 13:50:52 Y Cb Cr Positioning : Centered Exposure Time : 1/120 F Number : 2.2 Exposure Program : Program AE ISO : 40 Exif Version : 0221 Date/Time Original : 2016:11:06 13:50:52 Create Date : 2016:11:06 13:50:52 Components Configuration : Y, Cb, Cr, - Shutter Speed Value : 1/120 Aperture Value : 2.2 Brightness Value : 5.751730959 Exposure Compensation : 0 Metering Mode : Multi-segment Flash : Off, Did not fire Focal Length : 4.2 mm Subject Area : 2015 1511 2217 1330 Run Time Flags : Valid Run Time Value : 8415890928500 Run Time Epoch : 0 Run Time Scale : 1000000000 Acceleration Vector : 0.9942806863 0.02069931851 -0.1201243357 Sub Sec Time Original : 027 Sub Sec Time Digitized : 027 Flashpix Version : 0100 Color Space : sRGB Exif Image Width : 4032 Exif Image Height : 3024 Sensing Method : One-chip color area Scene Type : Directly photographed Exposure Mode : Auto White Balance : Auto Focal Length In 35mm Format : 29 mm Scene Capture Type : Standard Lens Info : 4.15mm f/2.2 Lens Make : Apple Lens Model : iPhone 6s back camera 4.15mm f/2.2 GPS Latitude Ref : North GPS Longitude Ref : East GPS Altitude Ref : Above Sea Level GPS Time Stamp : 04:50:51 GPS Speed Ref : km/h GPS Speed : 0 GPS Img Direction Ref : True North GPS Img Direction : 115.244898 GPS Dest Bearing Ref : True North GPS Dest Bearing : 115.244898 GPS Date Stamp : 2016:11:06 GPS Horizontal Positioning Error: 10 m Compression : JPEG (old-style) Thumbnail Offset : 2014 Thumbnail Length : 14110 Image Width : 4032 Image Height : 3024 Encoding Process : Baseline DCT, Huffman coding Bits Per Sample : 8 Color Components : 3 Y Cb Cr Sub Sampling : YCbCr4:2:0 (2 2) Aperture : 2.2 GPS Altitude : 95.3 m Above Sea Level GPS Date/Time : 2016:11:06 04:50:51Z GPS Latitude : 37 deg 40' 11.91" N GPS Longitude : 127 deg 0' 29.88" E GPS Position : 37 deg 40' 11.91" N, 127 deg 0' 29.88" E Image Size : 4032x3024 Megapixels : 12.2 Run Time Since Power Up : 2:20:15 Scale Factor To 35 mm Equivalent: 7.0 Shutter Speed : 1/120 Create Date : 2016:11:06 13:50:52.027 Date/Time Original : 2016:11:06 13:50:52.027 Thumbnail Image : (Binary data 14110 bytes, use -b option to extract) Circle Of Confusion : 0.004 mm Field Of View : 63.7 deg Focal Length : 4.2 mm (35 mm equivalent: 29.0 mm) Hyperfocal Distance : 1.82 m Light Value : 10.5
Investigation
GPS Position: 37 deg 40' 11.91" N, 127 deg 0' 29.88" E
が残っていたのでGoogle Maps等に入れてみます。
競技中は
(The correct answer is the address in Korea.
Example: 대한민국 부산광역시 ~~구 ~~동 37-21)
だったので辛かった。
238-1 Ui-dong, Gangbuk-gu, Seoul, South Korea
대한민국 서울 강북구 우동 238-1
ここまでやったのですが、solvedしなかったので悩んでいたら
st98さんがハングルの地名の表記を直してくれて、solvedしてくれました.
FLAG: 대한민국 서울특별시 강북구 우이동 238-1