Tags: packet analysis
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# 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
---
upload to [packettotal](https://packettotal.com/) this will tell you the answer.
https://packettotal.com/app/analysis?id=19909e5d2b04c11171c3ae2c29a3e22b
>SyskronCTF{Industroyer}
