Writeup Kuban CSC 2025 Райтап на таск Странный файл (Crypto)

[Cruel Lord]

Всем привет!

Странный файл
Уровень: Лёгкий
Данный файл, судя по всему, сделан в 2025 году. Что же там может быть...

Архив с таском прикрепил к райтапу

Начинаем:

Исследуем файл и видим, что в файле есть Base32 строка:

Спойлер

IZZG63JAORUGKIDDOJSWC5DPOIQG6ZRAORUGKIDUMFZWWOQKBIFOFI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO7QVYVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKFG7CUGN6FIE34KQZXYVAQTRKBHPCUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR36CXCUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKBP7CUCF6FI5E4KR2NYVAW3RKHN7CUODOFIUA4KQZ3YVATPRKFP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHPYK4KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FIUC4KR33YVAR7RKBBHCUCCOFIEE4KQIRYVCXPRKHJ7CUKUOFIVY4KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI57BLRKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KQKDYVDXDRKDD7CUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIV74KRYPYVATDRKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX4FOFI574KR37YVDX7RKHP7CUG76FIF74KQL7YVAX7RKBP7CUCP6FIE34KQJXYVATPRKBG7CUCN6FIE74KQLXYVCRPRKFPHCUGP6FIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVCXDRKHL7CUKEOFIVZ4KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO7QVYVDX7RKHP7CUO76FI574KRLBYVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUG76FIF74KQJXYVATPRKBCPCUCE6FIEJ4KQKHYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUO6OFINH4KQKBYVDX3RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR36CXCUO76FI574KR37YVDX7RKDGHCUK76FI574KR37YVDRXRKDKPCUCM6FIEB4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCEOFIUC4KQIJYVAQTRKBBHCUCCOFI5Q4KR37YVDT3RKFMHCUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHPYK4KR37YVDX7RKHP7CUO76FI574KR2NYVBTHRKDP7CUCF6FIEE4KQIJYVAQTRKDAHCUCSOFIEE4KQKJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKDBXCUCCOFIEE4KR3ZYVBT7RKBJHCUKEOFIER4KQZTYVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI57BLRKHP7CUO76FI574KR37YVDX7RKDP7CUCQ6FIEB4KQIJYVAQTRKBBHCUGGOFI5Q4KR35YVDX7RKHN7CUGCOFIVC4KQIJYVAQTRKBBHCUCCOFIVR4KRIBYVBX3RKHJ7CUOW6FI574KRYNYVCQHRKBEHCUGOOFI574KR37YVDX7RKHP7CUO76FI574KR37YVDX4FOFI574KR37YVDX7RKHP7CUO76FIVH4KQIHYVAQTRKBBHCUCCOFIEE4KQIPYVCX7RKHP7CUO76FI574KQZ7YVBXDRKBBHCUCCOFIEE4KQIJYVAXDRKBP7CUGE6FIVZ4KR37YVDX7RKDP7CUC4OFIEE4KQJBYVAXHRKHP7CUO76FI574KR37YVDX7RKHP7CUO7QVYVDX7RKHP7CUO76FI574KQ37YVARDRKBBHCUCCOFIEE4KQIJYVAQTRKBCHCUCROFIUJ4KRZXYVBVHRKBFHCUCA6FIUA4KQIJYVAQTRKBBHCUOQOFIME4KQIJYVAQTRKDEPCUCE6FIEQ4KQIDYVAQTRKBBHCUGD6FI574KR37YVDX7RKHP7CUO76FI574KR36CXCUO76FI574KR37YVDX7RKDB7CUGD6FIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBEPCUK2OFI424KR37YVDX7RKHFXCUGLOFIEB4KQIJYVAQTRKBBHCUCCOFIEE4KRKBYVDX7RKHP7CUO76FI574KR37YVDX7RKHPYK4KR37YVDX7RKHP7CUO76FIMH4KQIDYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIRYVBT7RKBG7CUCN6FIV74KQIHYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBGHCUO76FI574KR37YVDX7RKHP7CUO76FI57BLRKHP7CUO76FI574KR37YVBQ7RKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCEOFIES4KQJFYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIMG4KR37YVDX7RKHP7CUO76FI574KR37YVDX4FOFI574KR37YVDX7RKHP7CUGH6FIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KRIBYVCWDRKHP7CUO76FI574KR37YVDX7RKHP7CUO7QVYVDX7RKHP7CUO76FIU74KR2DYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCBOFIUA4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBEXCUKO6FIV74KR37YVDX7RKHP7CUO76FI574KR36CXCUO76FI574KR37YVCXDRKHP7CUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBEPCUGAOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCB6FIEE4KQIJYVCULRKFO7CUO76FI574KR37YVDX7RKHPYK4KR37YVDX7RKHP7CUK4OFI574KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQLBYVCQDRKDAHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIPYVAQTRKBBHCUKAOFIV24KR37YVDX7RKHP7CUO76FI57BLRKHP7CUO76FI574KRLRYVDX7RKDB7CUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEI4KQJDYVAQLRKBIHCUKCOFIEE4KQIJYVAQTRKBBHCUCCOFIUA4KQJJYVAQHRKBBHCUCCOFI5A4KRIVYVDX3RKHP7CUO76FI574KR37YVDX4FOFI574KR37YVDX7RKFOHCUO76FIED4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBCHCUCIOFIES4KQKFYVAUTRKBJHCUCSOFIEE4KQIJYVAQLRKBBHCUCCOFIEE4KQIJYVAUPRKBJHCUCJOFIEC4KQIDYVAQTRKFHHCUK76FI574KR37YVDX7RKHP7CUO7QVYVDX7RKHP7CUO76FIVY4KQZ7YVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEI4KQIDYVAQLRKFBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEI4KQZZYVDX7RKHP7CUO76FI574KR36CXCUO76FI574KR37YVDRTRKFM7CUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KRKFYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUO76FI574KR37YVDX7RKHPYK4KR37YVDX7RKHP7CUO76FIN24KQINYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBCHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIME4KRL7YVDX7RKHP7CUO76FI57BLRKHP7CUO76FI574KQYPYVBQ7RKHLXCUCROFI5A4KQ3NYVCW3RKDAHCUCCOFIEE4KQIJYVAQTRKBBHCUCQOFIFU4KQIJYVBQDRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVAQTRKBBHCUCCOFIEE4KQIJYVARDRKBEHCUKO6FIV74KR37YVDX4FOFI574KR37YVDX7RKHJ7CUKT6FI4J4KR35YVBRPRKBJPCUK5OFI5H4KQIJYVDQDRKDAHCUCCOFIEE4KQIJYVAQTRKBBHCUCEOFIFT4KQYBYVAUTRKBJHCUCSOFI4A4KRZFYVDVTRKHLPCUOSOFI4A4KRYBYVDSLRKHAXCUGQOFIFE4KQKJYVDXDRKHP7CUO7QVYVDX7RKHP7CUO76FI574KR37YVDW7RKHLHCUOM6FI434KQLNYVCT7RKHPHCUO36FI5W4KR3NYVDV3RKHLPCUOS6FI4W4KRZFYVDSLRKHNPCUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR36CXCUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHP7CUO76FI574KR37YVDX7RKHPYK4KR37YVBX7RKHG7CUON6FI434KRZXYVBTPRKFH7CUON6FI434KRZXYVDTPRKDO7CUKN6FI434KRZXYVDTPRKHG7CUKN6FI434KQL7YVAX7RKBP7CUG76FIUL4KQYNYVBX7RKHG7CUON6FI434KRZXYVDTPRKHG7CUC76FIU34KRZXYVDTPRKHG7CUC56FI57BLRKHP7CUGD6FI574KR37YVDV7RKHLPCUG76FIFY4KR2PYVDVTRKHP7CUO76FIMH4KRL7YVDX7RKHL7CUOW6FIVJ4KRLRYVDX7RKHN7CUCJOFIVW4KQYNYVCX7RKHP7CUGDOFI5E4KQYBYVDX7RKHP7CUKF6FI5F4KRLBYVDV3RKHLPCUO76FI574KRIPYVDX4FOFI574KR3PYVDT7RKHJPCUO3OFI5W4KR3NYVDW7RKHNXCUO3OFI5W4KR3NYVDX3RKHNXCUO3OFI5W4KR3NYVDX3RKHP7CUO3OFI5W4KR37YVDW3RKHPXCUO36FI5W4KR35YVDX7RKHP7CUO3OFI5W4KR37YVDX7RKHN7CUO3OFI5W4KR3NYVDW3RKHP7CUO7QUCSLMVSXAICQN5RWQ2LUMEXCAQTZEB2GQZJAO5QXSLBAORUGKIDUMFZWWIDIMFZSAYJAINQWK43BOIQGG2LQNBSXEIDBNZSCAYLOEBAUKUZAMNUXA2DFOIQDWKIK

Декодим

Ссылка скрыта от гостей

и получаем:

Keep Pochita. By the way, the task has a Caesar cipher and an AES cipher

Перевод:

Кстати, в задании есть шифр Цезаря и шифр AES.

В файле есть шифрованная строка, ключ и IV для алгоритма шифрования AES

The standard for symmetric encryption.
12bcaf93ff0012cc99abcdef03941325
cc03941325caf93f12b012f099abcdef

Расшифровываем

Ссылка скрыта от гостей

, подставив шифрованную строку и данные для расшифровки

После расшифровки AES, Кибершеф нам с помощью Волшебной палочки, в разделе Output, предлагает расшифровать ещё пару шифров:

AES -> Morse -> Base32

Ссылка скрыта от гостей

После расшифровки получили такой текст:

Veni, vidi, vici.

Спойлер

QmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHjQGDjQmTjQcHjQGDjQmPjQmLjQGDjQmTjQcDjQGDjQmTjQcDjQGDjQmTjQcHj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Фраза Veni, vidi, vici это отсылка к Цезарю, но самого шифра Цезаря в таске нет

Удаляем из текста Veni, vidi, vici.

Множество символов повторяется, попробуем шифр замены и получим бинарный код:

QmTjQcDjQGDj → 0
QmTjQcHjQGDj → 1
QmPjQmLjQGDj → разделитель

Получаем такой код:

00110100 00110011 00100000 00110101 00110011 00100000 00110100 00110011 00100000 00110111 01100010 00100000 00110110 00111000 00100000 00110011 00110010 00100000 00110110 01100011 00100000 00110011 00110001 00100000 00110011 00110000 00100000 00110101 01100110 00100000 00110100 00110011 00100000 00110111 00110010 00100000 00110111 00111001 00100000 00110111 00110000 00100000 00110111 00110100 00100000 00110011 00110000 00100000 00110101 01100110 00100000 00110110 00110010 00100000 00110101 00110010 00100000 00110011 00110000 00100000 00110111 01100100

Декодим бинарный код и получаем:

43 53 43 7b 68 32 6c 31 30 5f 43 72 79 70 74 30 5f 62 52 30 7d

Декодим из хекс и получаем флаг

Бонус)

Все эти операции можно сразу проделать Кибершефом:

Ссылка скрыта от гостей

 

[M4x]

Расшифровка в один подход

Можно проще: 8 операций. Но скорее всего, можно сделать даже еще элегантнее.