The following snort rule: alert tcp any any -> any 80 (priority:2; msg:"LOCAL Command access' content:"/command.exe"; nocase; sid:1000100; rev:1;) generated the following alert (Priority: 2) 01/20-21:02:80.509944 172.30.101.115:48447 -> 204.126.133.86 TCP TTL: 64 TOS:0XO ID:35360 IpLen:20 DgmLen:364 DF ***AP*** Seq: O×7455EBE4 Ack: 0×D723C219 Win: 0XE5 TcpLen: 32 TCP Options (3): => NOP NOP TS: 2515457 481426654 for the following packet data transacted: 3/01-11:25:22.199554 172.30.101.115:48447 -> 204.126.133.86:8 GET ../../../../Windows/command.exe?dir%20c:\Program%20Files HTTP/1.2 What is the source IP address? What signature rule/string pattern did the rule match to generate the alert? (hint: which rule's field is related to the string pattern?) What is the IP identification? What is the IP address of the web server?

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**Snort Rule and Alert Analysis**

The following snort rule:

```plaintext
alert tcp any any -> any 80 (priority:2; msg:"LOCAL Command access"; content:"/command.exe"; nocase; sid:1000100; rev:1;)
```

Generated the following alert:

- **Priority**: 2
- **Timestamp**: 01/20-21:02:80.509944
- **Source IP/Port**: 172.30.101.115:48447
- **Destination IP/Port**: 204.126.133.86:80
- **TCP TTL**: 64
- **TOS**: 0X0
- **ID**: 35360
- **IpLen**: 20
- **DgmLen**: 364
- **DF**: (Don't Fragment flag)
- **Sequence**: 0x7455EBE4
- **Acknowledgment**: 0xD723C219
- **Window**: 0xE5
- **TcpLen**: 32
- **TCP Options**: NOP NOP TS: 2515457 481426654

_For the following packet data transacted:_

```plaintext
3/01-11:25:22.199554 172.30.101.115:48447 -> 204.126.133.86:80
GET ../../../../Windows/command.exe?dir%20c:\Program%20Files HTTP/1.2
```

**Educational Questions:**

1. **What is the source IP address?**  
   <input type="text" placeholder="Your answer here">

2. **What signature rule/string pattern did the rule match to generate the alert? (hint: which rule's field is related to the string pattern?)**  
   <input type="text" placeholder="Your answer here">

3. **What is the IP identification?**  
   <input type="text" placeholder="Your answer here">

4. **What is the IP address of the web server?**  
   <input type="text" placeholder="Your answer here">

This exercise involves understanding network intrusion detection through interpreting Snort rules and alerts. It is crucial to identify key components such as source IP addresses, signature matches, and web server IP addresses.
Transcribed Image Text:**Snort Rule and Alert Analysis** The following snort rule: ```plaintext alert tcp any any -> any 80 (priority:2; msg:"LOCAL Command access"; content:"/command.exe"; nocase; sid:1000100; rev:1;) ``` Generated the following alert: - **Priority**: 2 - **Timestamp**: 01/20-21:02:80.509944 - **Source IP/Port**: 172.30.101.115:48447 - **Destination IP/Port**: 204.126.133.86:80 - **TCP TTL**: 64 - **TOS**: 0X0 - **ID**: 35360 - **IpLen**: 20 - **DgmLen**: 364 - **DF**: (Don't Fragment flag) - **Sequence**: 0x7455EBE4 - **Acknowledgment**: 0xD723C219 - **Window**: 0xE5 - **TcpLen**: 32 - **TCP Options**: NOP NOP TS: 2515457 481426654 _For the following packet data transacted:_ ```plaintext 3/01-11:25:22.199554 172.30.101.115:48447 -> 204.126.133.86:80 GET ../../../../Windows/command.exe?dir%20c:\Program%20Files HTTP/1.2 ``` **Educational Questions:** 1. **What is the source IP address?** <input type="text" placeholder="Your answer here"> 2. **What signature rule/string pattern did the rule match to generate the alert? (hint: which rule's field is related to the string pattern?)** <input type="text" placeholder="Your answer here"> 3. **What is the IP identification?** <input type="text" placeholder="Your answer here"> 4. **What is the IP address of the web server?** <input type="text" placeholder="Your answer here"> This exercise involves understanding network intrusion detection through interpreting Snort rules and alerts. It is crucial to identify key components such as source IP addresses, signature matches, and web server IP addresses.
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