T0p_S3cr3t_0p3r4ti0ns

Downloading Challenge Files

here is the executable file to download

122KB

T0p_S3cr3t_0p3r4ti0ns.rar

in this challenge we have only a pcapng file let's open it using wireshark and analyze the traffic

if we filter by the ftp protocol we can see that a stupid_passphrase.txt file is transfered so let's extract this file

then a pop up will open select the file and save it

let's upload our file in this website to collect more informatons

• https://apackets.com/

let's open this link and download the zip file

the zip file downloaded contains the flag inside it but it's protected by a password let's try the passphrase that we have found earlier

w3_4r3_Lapsus$_4nd_W3_4r3_Th3_0n3s_Wh0_Wi1l_br1ng_d0wn_Th3_0n3s_1n_C0ntr0l

but it doesn't work let's reverse it, and now it works

and when ew unzip the file we find this

which is a base64 encoding let's decode it using cyberchef and it gives us binary code

now let's convert it from binary

and it gives us octal so let's convert it from octal

and then it gives us hex so let's convert it from hex

and it gives us base32 encoding since it's a combination of uppercase and numbers ends with equal sign, so let's convert it from base32

and it gives us since it's a combination of uppercase lowercase and numbers ends with equal sign base64 encoding, so let's convert it from base64

and we have the flag

Flag

DEFENSYS{n3tc4t_1s_411_Y0u_n33d_to_c0nt4ct_y0ur_f3ll0w_H4ck3r!!}

Greetings from Sayonara