Решите задачу о вирусе, который изменил важные данные
В одном темном-темном городе на темной-темной улице в темной-темной квартире жил «черный» хакер, который заразил вирусом некий компьютер. Ситуация страшная, но исправимая. Предлагаем попробовать свои силы в борьбе со злоумышленником и решить айтишную задачу.
Условие
На очень важном хосте N отработал вирус, в результате все чувствительные данные превратились в наборы символов и чисел. Бэкапы также повреждены, но специалистам удалось достать файл с логинами и преобразованными паролями.
В нем было следующее:
root:51/\/51/\/57/\/57/\/55/\/55/\/57/\/57/\/49/\/49/\/98/\/98/\/55/\/55/\/101/\/101/\/55/\/55/\/49/\/49/\/50/\/50/\/97/\/97/\/99/\/99/\/53/\/53/\/48/\/48/\/56/\/56/\/100/\/100/\/50/\/50/\/48/\/48/\/48/\/48/\/101/\/101/\/56/\/56/\/50/\/50/\/49/\/49/\/50/\/50/\/101/\/101/\/57/\/57/\/51/\/51/\/49/\/49/\/49/\/49/\/102/\/102/\/56/\/56/\/100/\/100/\/100/\/100/\/102/\/102/\/57/\/57/\/52/\/52/\/100/\/100/\/97/\/97/\/51/\/51/\/51/\/51/\/55/\/55/\/48/\/48/\/54/\/54/\/99/\/99/\/55/\/55/\/53/\/53/\/97/\/97/\/55/\/55/\/49/\/49/\/97/\/97/\/56/\/56/\/102/\/102/\/57/\/57/\/48/\/48/\/55/\/55/\/55/\/55/\/49/\/49/\/55/\/55/\/98/\/98/\/49/\/49/\/102/\/102/\/57/\/57/\/55/\/55
admin:54/\/54/\/100/\/100/\/52/\/52/\/53/\/53/\/50/\/50/\/53/\/53/\/99/\/99/\/50/\/50/\/97/\/97/\/50/\/50/\/49/\/49/\/102/\/102/\/57/\/57/\/98/\/98/\/101/\/101/\/49/\/49/\/99/\/99/\/99/\/99/\/97/\/97/\/57/\/57/\/101/\/101/\/52/\/52/\/49/\/49/\/102/\/102/\/51/\/51/\/97/\/97/\/97/\/97/\/52/\/52/\/48/\/48/\/50/\/50/\/101/\/101/\/48/\/48/\/55/\/55/\/54/\/54/\/53/\/53/\/101/\/101/\/101/\/101/\/53/\/53/\/102/\/102/\/99/\/99/\/99/\/99/\/51/\/51/\/101/\/101/\/55/\/55/\/102/\/102/\/101/\/101/\/97/\/97/\/51/\/51/\/52/\/52/\/97/\/97/\/49/\/49/\/54/\/54/\/57/\/57/\/98/\/98/\/49/\/49/\/55/\/55/\/51/\/51/\/48/\/48/\/97/\/97/\/101/\/101/\/51/\/51/\/56/\/56/\/54/\/54/\/101/\/101
operator:56/\/56/\/53/\/53/\/102/\/102/\/56/\/56/\/99/\/99/\/55/\/55/\/48/\/48/\/99/\/99/\/54/\/54/\/100/\/100/\/98/\/98/\/55/\/55/\/55/\/55/\/55/\/55/\/97/\/97/\/97/\/97/\/100/\/100/\/101/\/101/\/54/\/54/\/97/\/97/\/52/\/52/\/97/\/97/\/101/\/101/\/48/\/48/\/100/\/100/\/102/\/102/\/54/\/54/\/55/\/55/\/97/\/97/\/101/\/101/\/100/\/100/\/99/\/99/\/49/\/49/\/55/\/55/\/57/\/57/\/98/\/98/\/55/\/55/\/98/\/98/\/51/\/51/\/98/\/98/\/53/\/53/\/97/\/97/\/56/\/56/\/102/\/102/\/54/\/54/\/52/\/52/\/54/\/54/\/50/\/50/\/53/\/53/\/57/\/57/\/49/\/49/\/48/\/48/\/57/\/57/\/55/\/55/\/50/\/50/\/97/\/97/\/50/\/50/\/50/\/50/\/57/\/57/\/98/\/98/\/54/\/54/\/97/\/97/\/53/\/53/\/97/\/97
user:52/\/52/\/50/\/50/\/51/\/51/\/52/\/52/\/97/\/97/\/57/\/57/\/99/\/99/\/101/\/101/\/97/\/97/\/50/\/50/\/49/\/49/\/102/\/102/\/97/\/97/\/57/\/57/\/49/\/49/\/49/\/49/\/49/\/49/\/49/\/49/\/48/\/48/\/99/\/99/\/102/\/102/\/51/\/51/\/54/\/54/\/101/\/101/\/57/\/57/\/54/\/54/\/99/\/99/\/100/\/100/\/56/\/56/\/56/\/56/\/55/\/55/\/48/\/48/\/52/\/52/\/57/\/57/\/53/\/53/\/52/\/52/\/51/\/51/\/99/\/99/\/97/\/97/\/51/\/51/\/49/\/49/\/101/\/101/\/55/\/55/\/99/\/99/\/57/\/57/\/53/\/53/\/101/\/101/\/48/\/48/\/52/\/52/\/48/\/48/\/50/\/50/\/56/\/56/\/50/\/50/\/57/\/57/\/48/\/48/\/98/\/98/\/100/\/100/\/101/\/101/\/49/\/49/\/100/\/100/\/98/\/98/\/49/\/49/\/101/\/101/\/48/\/48
Исходный формат строк в файле был таким:
login:hashedpassword
В результате реверса вируса вы обнаружили код, преобразовывающий хэши паролей:
hashed_password = '' #hashed passwd is here
passwd = list(hashed_password.swapcase())
passwd_1 = []
for item in passwd:
passwd_1 += item*2
passwd_2 = []
for item in passwd_1:
passwd_2.append(str(ord(item)))
passwd_final = '/\/'.join(passwd_2)
Задача
Помогите понять способ восстановления данных, преобразовав эти наборы символов в исходные хэши паролей.
Делитесь в комментариях своими ответами. Если будет сложно, посмотрите пошаговое решение в Академии Selectel.
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