# Syskron Security CTF 2020- DoS attack
- Write-Up Author: Rb916120 \[[MOCTF](https://www.facebook.com/MOCSCTF)\]
- Flag:SyskronCTF{Industroyer}
## **Question:**DoS attack
>Challenge description  >One customer of Senork Vertriebs GmbH reports that some older Siemens devices repeatedly crash.  >We looked into it and it seems that there is some malicious network traffic that triggers a DoS condition.  >Can you please identify the malware used in the DoS attack? We attached the relevant network traffic.  >>Flag format: syskronCTF{name-of-the-malware}  >>Hint  >They bought some older SIPROTEC 4 protection relays.  
[dos-attack.pcap](./dos-attack.pcap)
## Write up**below tool required in this article.**  [packettotal](https://packettotal.com/) - an engine for analyzing, categorizing, and sharing .pcap files  
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upload to [packettotal](https://packettotal.com/) this will tell you the answer.
https://packettotal.com/app/analysis?id=19909e5d2b04c11171c3ae2c29a3e22b![img](./img/1.PNG)  
>SyskronCTF{Industroyer}