---
# System prepended metadata

title: 2024 HITCON Cyber Range 學生場 Write_up
tags: [CS Note]

---

# 2024 HITCON Cyber Range 學生場 Write_up
在來之前完全沒摸過藍隊，但就是秉持著**我是來學習的**精神(X
就是沒有參加初賽的快樂學生，AIS3讚!
從開始說明規則之後就完全茫掉了
跟題目乾瞪眼到中午之後才大概知道要怎麼做，才開始瘋狂解題。
~~但解到後面之後發現可以善用刪去法、條件、跟答案爆破~~

## 環境介紹
大概長這樣 但我沒很懂(~~資網重修~~
![image](https://hackmd.io/_uploads/rkNvtikWJl.png)
然後會像這樣有題目要填找到的答案
![image](https://hackmd.io/_uploads/HkyFtsJZyl.png)
全對才有分，錯了會有禁答懲罰(最多3分鐘)，但會告訴你哪個錯![image](https://hackmd.io/_uploads/SkDbqiybJl.png)
所以可以把可能答案填一填，說不定就矇對了(X
![image](https://hackmd.io/_uploads/BJfiqjJZ1e.png)
Log Viewer像這樣，要學一下怎麼用，是splunk的


## Digital Storm (+50 pts)
> Our intrusion detection system has flagged unusual network activity indicative of automated scanning tools. The scans appear to be systematically probing our network for vulnerabilities.
> Investigate this incident and determine the nature and extent of the scanning activity.

有人在做壞壞的掃描
Apache Log打開就看的到 
![image](https://hackmd.io/_uploads/Hytr7vyW1l.png)
所以
![image](https://hackmd.io/_uploads/H1v8QDk-kg.png)


## Web Intrusion (+100 pts)
> After automated scanning, a targeted attack was detected.
> An attacker exploited a vulnerability in our web server to gain unauthorized access to the system.

那個壞壞的人掃描完，就在web幹壞事
設定status 200 找他有存取成功的指令
在看到第6頁的時候發現他掃描完開始幹大事了，看來就是這裡
![image](https://hackmd.io/_uploads/BJ9GVDJZkg.png)

綜合在Apache log首頁看到的version資訊
![image](https://hackmd.io/_uploads/S1y84vkW1l.png)

問題是這是哪個CVE
2.4.58其實版本蠻新的，||，加上大哥的場外救援||加上這是Hitcon 2024 Cyber Range
[只能是橘神啦](https://blog.orange.tw/posts/2024-08-confusion-attacks-en/)
![image](https://hackmd.io/_uploads/rkZRVP1-1g.png)

## Config Raid (+50 pts)
> Our security monitoring system flagged suspicious activity on a critical server, including unexpected account usage followed by unusual file access.
> Sensitive configuration files appear to have been accessed and downloaded. Investigate this incident and provide details about the timing and destination of the data movement.

他web shell完開始偷東西了!
綜合題目說的**意外的帳戶使用**
![image](https://hackmd.io/_uploads/rJUwBvyWJg.png)
試了一下這個就成功了
![image](https://hackmd.io/_uploads/SkaAHwkWkg.png)


## VPN interfusion (+50 pts)
> Following the web server breach, the attacker discovered VPN credentials in the stolen configuration files.
> These credentials were then used to establish an unauthorized VPN connection.

這隊友寫的
![image](https://hackmd.io/_uploads/BkVeLvJ-ke.png)


## Internal Recon (+75 pts)
> After gaining unauthorized VPN access, the attacker initiated an internal network scan.
> Detect and analyze this scanning activity to understand the attacker's reconnaissance efforts within our network.

也是神隊友
![image](https://hackmd.io/_uploads/BkE-8v1ZJl.png)

## Credential Spread (+50 pts)
> Using the credentials obtained from the network sniffing attack, the attacker successfully logged into a new machine on the network.

在AD Log看到 在09:10之後 最早的rlee這個人的登錄是在
![image](https://hackmd.io/_uploads/ry-svDyWJg.png)
然後也可以找到最早的登入時間 
![image](https://hackmd.io/_uploads/rkvM_PkZke.png)
他本來都在刷22然後443
但突然出現445 之後就可以登入了
所以就想說試試看
就中了
![image](https://hackmd.io/_uploads/HyrI8v1bJg.png)


## 結論
我以為我的硬碟空間很夠，結果並沒有
![image](https://hackmd.io/_uploads/SJrvTPJZJe.png)
主辦提供的VM都開不起來，一整個我好爛🥲
但還是感謝AIS3和比賽當天才第一次見面的隊友們
玩到後面真的覺得很好玩還想繼續玩下去，可惜時間有限
雖然我真的好菜，**勇奪最後一名**
![image](https://hackmd.io/_uploads/r1C_OikZye.png)
但是能還見到又一陣子沒見到的朋友們，開心開心🥰









:::spoiler
||很猶豫要不要公開，但反正寫得這麼爛也不會有人看嘿嘿||
:::


