secarmy-CTF-2.0

Writeups of secarmy CTF 2.0 my team : Krypton

Originally posted at: madhusudan.live

welcome

1) Welcome All

flag : secarmy{w3lc0me_y0u_all}

Welcome All

2) Netcat

flag : secarmy{W3lc0m3_T0_S3c4RmyC7F0x02}

netcat

3) InstaFamous

flag : secarmy{w3lc0me_1n$t@_f@m1ly}

instafamous

starters

1) “16+8”

flag : secarmy{Num3er_sys73m}

we have given two files with numbers in it

1 ) 
  73 65 63 61 72 6d 79 7b
2 ) 
 116 165 155 63 145 162 137 163 171 163 67 63 155 175

as the name suggests the first part was hex and the second was octal so doing a simple conversion we got the flag

2) Die basis

flag : secarmy{fl@g_1s__th3_b@s3}

two files given

1) 
 ********c2VjYXJteXtmbEBnXzFzXw==*******
2) 
 **********L52GQM27MJAHGM35*********

the first one was base64 and the second one was base32 encoded

3) Easy capture

flag : secarmy{h3r3_y0u_c@ptur3}

one’s and zeroes to be converted to text

01110011 01100101 01100011 01100001 01110010 01101101 01111001 01111011 01101000 
  00110011 01110010 00110011 01011111 01111001 00110000 01110101 01011111 01100011 
  01000000 01110000 01110100 01110101 01110010 00110011 01111101

4) Image

flag : secarmy{th3_im@ge_s4ys_i7_a11}

doing a simple zsteg revealed the flag

here's the image

5) Th3 G1f7

flag : secarmy{h3re_1s_th3_g1ft}

same thing again the flag was revealed by a zsteg

the gift

forensics

its all in your head

flag : secarmy{h3ad3rs_t3ll_a_l0t}

a corrupted png file was given

so i tried hexdump but the magic bytes were different from png so i changed them with hexedit which revealed the flag. flag

secret

flag : secarmy{ain’t_visible?}

here's the pdf

a pdf with a username and a password hidden by asterisks after using pdftotext tool the flag was found

the confusion

flag : secarmy{WA3_I7_s0_c0nfu3ing}

flag was split and hidden in two images the first part was ROT13 and second was ROT47

the bin

flag : secarmy{PAST3_B1N_H@S_S0LUT10N}

here you  have the flag :- 61 48 52 30 63 48 4d 36 4c 79 39 77 59 58 4e 30 5a 57 4a 70 62 69 35 6a 62 32 30 76 54 45 30 35 63 57 56 33 64 57 6b 3d 
61 48 52 30 63 48 4d 36 4c 79 39 77 59 58 4e 30 5a 57 4a 70 62 69 35 6a 62 32 30 76 57 6d 52 71 54 6a 6

hex to text conversion gave two links of pastebin out of which the second one was working flag

Save them

flag : secarmy{PAST3_B1N_H@S_S0LUT10N}

Binary/Reversing

Stringy

flag : secarmy{l00k_a7_th3_str1ng5!!}

here's the binary

as the name suggests i did strings on the elf which gave me some weird strings c2VjYXJtH eXtsMDBrH X2E3X3RoH M19zdHIxH bmc1ISF9H

i tried base64 but it didnt worked then i removed the H at the end and it gave me flag

Smash it

flag : secarmy{sm@sh1ng_st@ck_1s_t00_much_fun}

here’s the binary

flag

F-L-A-S-H

flag : secarmy{7h1s_w45_345y_p34zy}

here’s the binary

flag

backyard cow

flag : secarmy{d0y0u_l1k3_c0w_languag3___?}

here’s the binary

on reversing it with radare2 gave me a link to google drive file which has moo written everywhere, then i decoded it with cow interpreter

flag

web

prizes

flag : secarmy{s0urc3_i5_n3ces5ary}

web_salad

flag : secarmy{w3b_buck3t_3nc0un7er3d}

flag : secarmy{the_$hy_c00kie_w1th1n}

silly mangolian 2.0

flag : secarmy{why_1s_th1s_m0ng0li@n_$uch_@_f00l}