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add challenge
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noonomyen committed Sep 30, 2024
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# Encrypted C2 v2

## WIP
![1.png](../../images/network-security/encrypted-c2-v2/1.png)

[open_netsec3.pcapng](../../files/open_netsec3.pcapng)

## Solving

![2.png](../../images/network-security/encrypted-c2-v2/2.png)

export ไว้รอเลย

![3.png](../../images/network-security/encrypted-c2-v2/3.png)

จากที่ดูคือเราต้องเอา maps ไปใช้ในการถอดรหัส จะได้จาก handshake และ ข้อความจะเกิดขึ้นตอน callback

![4.png](../../images/network-security/encrypted-c2-v2/4.png)

เราเลยเขียน code loop ถอดมันทุกแบบไปเลย

## Result

![5.png](../../images/network-security/encrypted-c2-v2/5.png)

it work
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# HTTP Mayhem

## WIP
![1.png](../../images/network-security/http-mayhem/1.png)

[open_netsec1.pcapng](../../files/open_netsec1.pcapng)

## Solving

เราเปิดมาพบ 2 stream ที่เป็น http

![2.png](../../images/network-security/http-mayhem/2.png)

มันคือ code python ที่เอาไว้ใช้ทำอะไรสักอย่าง

![3.png](../../images/network-security/http-mayhem/3.png)

รูป

![4.png](../../images/network-security/http-mayhem/4.png)

เราจึงลองเอารูปนั้นมาเปิดดู แต่ทำไมไม่มีอะไรเลย ?

![5.png](../../images/network-security/http-mayhem/5.png)

เราจึงกลับไปดูที่ code เราจึงเดาๆได้ว่า code นี้ใช้ในการซ่อนข้อมูลใน pixle bit สุดท้าย

![6.png](../../images/network-security/http-mayhem/6.png)

เราจึงเขียนแก้ code ให้ใช้เป็นการถอดรหัส

## Result

![7.png](../../images/network-security/http-mayhem/7.png)
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# Silent Whisper

## WIP
![1.png](../../images/network-security/slient-whisper/1.png)

[open_netsec2.pcapng](../../files/open_netsec2.pcapng)

## Solving

![2.png](../../images/network-security/slient-whisper/2.png)

หน้าที่ของเราคือต้องมาหาว่า password ไหนที่ใช้เข้าสู่ระบบได้สำเร็จ

![3.png](../../images/network-security/slient-whisper/3.png)

เราจึงทดลองด้วย key word สักตัวเพื่อดูว่ามันจะมีคำไหนบ้าง ซึ่งดูเหมือนถ้า login สำเร็จจะมีคำนี้

![4.png](../../images/network-security/slient-whisper/4.png)

เราจึงเอาคำนั้นไป filter ใน wireshark

## Result

![5.png](../../images/network-security/slient-whisper/5.png)
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