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Pakkeleg i Haraldsgade Multi-Cache

Hidden : 2/6/2024
Difficulty:
5 out of 5
Terrain:
4 out of 5

Size: Size:   micro (micro)

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How Geocaching Works

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Geocache Description:


Your task is to find the password for the attached base64 encoded encrypted zip file on site at the start of this multi.

You are looking for 3 hex numbers.

The numbers:
00:60:37:E5:8a:bc
00:60:37:09:6d:ef
D5:C7:77:77:5g:hi

Password: abcdefghi + a number between 100-999 you need to bruteforce.

Salt are stored in the zipfile.

Encrypted zip file:
UEsDBBQAAwBjAARVR1gAAAAALwAAABEAAAAFAAsAUy50eHQBmQcAAgBBRQMIAA1kWkVUEzjheSIAqTJnvholfNv/lW8TrVyUrBpqhAcTApgOvDsWXi+//svfOJUuUEsBAhQAFAADAGMABFVHWAAAAAAvAAAAEQAAAAUACwAAAAAAAQAgAAAAAAAAAFMudHh0AZkHAAIAQUUDCABQSwUGAAAAAAEAAQA+AAAAXQAAAAAA


Assuming final are stored in the format: "N55 yy.xxx" and "E12 yy.xxx" you need to match CRC32:

salt + N = 224425781
salt + E = 2820928555



Example:

Password: abc + number 1000.
Number: 00:60:37:E5:80:99
Password = "0991000"

If salt = "123"
CRC32 for salt + "Tirsdagsholdet" = 3726293802

Additional Hints (Decrypt)

Crgyvat

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)