【TryHackMe】CyberChef: The Basics：Walkthrough

# 概要

TryHackMe「CyberChef: The Basics」のWalkthroughです。

https://tryhackme.com/r/room/cyberchefbasics

# Task3

## **Q1**.*In which area can you find "From Base64"?*

**A**.**operations**

## **Q2**.*Which area is considered the heart of the tool?*

**A**.**Recipe**

# Task4

## **Q1**.*At which step would you determine, "What do I want to accomplish?*

**A**.**1**

# Task5

## **Q1**.*What is the hidden email address?*

**Hint**.*Use the operation "Extract email addresses".*

`Extract email addresses`を使用してEmailアドレスをテキストから抽出出来ました。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/3005822/5887a1f5-5c71-9e23-9b8d-e740cb43c1a8.png)

**A**.**hidden@&#xFFF0;hotmail.com**

## **Q2**.*What is the hidden IP address that ends in .232?*

**Hint**.*Use the operation "Extract IP addresses".*

`Extract IP addresses`を使用して2つのIPアドレスを抽出出来ました。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/3005822/0b57887f-e64c-48d2-8b61-870304dc9595.png)

**A**.**102.20.11.232**

## **Q3**.*Which domain address starts with the letter "T"?*

**Hint**.*Use the operation "Extract domains".*

`Extract domains`を使用して2つのドメインを抽出出来ました。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/3005822/f741d327-4449-7778-b990-9c1ded2c66fb.png)

**A**.**TryHackMe.com**

## **Q4**.*What is the binary value of the decimal number 78?*

**Hint**.*Combine the operations "From Decimal" and "To Binary".*

`From Decimal`->`To Binary`の順で変換します。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/3005822/03eff4dc-c813-a1ae-dea4-a1e9c5a50e71.png)

**A**.**01001110**

## **Q5**.*What is the URL encoded value of https\://tryhackme.com/r/careers?*

**Hint**.*Use the "URL Encode" operation with the "Encode all special chars" checkbox enabled.*

`URL Encode`を使用してURLエンコードします。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/3005822/0bf65bdc-1924-e931-e987-29c0ea5095f0.png)

**A**.**https%3A%2F%2Ftryhackme%2Ecom%2Fr%2Fcareers**

# Task6

## **Q1**.*Using the file you downloaded in Task 5, which IP starts and ends with "10"?*

**Hint**.*Use the operation "Extract IP addresses" and check the "IPv4" checkbox.*

`Extract IP addresses`を使用して2つのIPアドレスを抽出出来ました。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/3005822/0b57887f-e64c-48d2-8b61-870304dc9595.png)

**A**.**10.10.2.10**

## **Q2**.*What is the base64 encoded value of the string "Nice Room!"?*

**Hint**.*Use the operation "To Base64".*

`To Base64`を使用してBase64エンコードします。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/3005822/7a2593f9-2e9a-43bd-8ad6-6a6dddc34971.png)

**A**.**TmljZSBSb29tIQ==**

## **Q3**.*What is the URL decoded value for https%3A%2F%2Ftryhackme%2Ecom%2Fr%2Froom%2Fcyberchefbasics?*

**Hint**.*Use the operation "URL Decode".*

`URL Decode`でURLをデコードします。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/3005822/d94462b0-ad8c-e14f-8731-86f718c384cf.png)

**A**.**https\://tryhackme.com/r/room/cyberchefbasics**

## **Q4**.*What is the datetime string for the Unix timestamp 1725151258?*

**Hint**.*Use the operation "From UNIX Timestamp" with default parameters.*

`From UNIX Timestamp`を使用して変換します。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/3005822/9c72b4d1-60cc-87e7-c7ed-5fea3a5bc0fc.png)

**A**.**Sun 1 September 2024 00:40:58 UTC**

## **Q5**.*What is the Base85 decoded string of the value <+oue+DGm>Ap%u7?*

**Hint**.*Use the operation "From Base85" with default parameters.*

`From Base85`を使用してBase85でデコードします。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/3005822/78167d6b-a779-fd99-fd26-0fc30c1dbfa4.png)

**A**.**This is fun!**