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Introduction:
The LinkedIn post by Priom Biswas offers a tantalizing “Cybersecurity Books Collection” covering Web Hacking, Advanced Penetration Testing, Kali Linux, and Cloud Security via a shortened link (https://lnkd.in/g3KxHzrG). While such archives accelerate learning, they also pose risks—malicious PDFs, outdated techniques, or legal boundaries. This article dissects how to safely acquire, validate, and operationalize these resources using real Linux/Windows commands, lab setups, and cloud hardening exercises.
Learning Objectives:
- Validate downloaded security e-books for malware and integrity using cryptographic hashes.
- Build an isolated ethical hacking lab with Kali Linux and vulnerable targets.
- Apply cloud security and API protection commands from AWS/CSPM perspectives.
You Should Know:
- Safe Extraction & Verification of the Book Archive
The provided LinkedIn link points to a downloadable archive (likely ZIP or PDFs). Before opening any file, assume it could be weaponized. Follow this step-by-step verification process:
Step 1 – Download in a sandbox environment
Use a disposable virtual machine or a Linux sandbox. On Windows, enable Windows Sandbox (Pro/Enterprise) or use a temporary AWS Workspace.
Windows: Check if Sandbox feature is available dism /online /enable-feature /featurename:Containers-DisposableClientVM /all /norestart
Step 2 – Calculate file hashes and compare with known sources
After downloading `cyber_books.zip` (example), compute its SHA-256. Cross-reference with any hash the author published (none here, so treat as unknown).
Linux / macOS sha256sum cyber_books.zip Windows PowerShell Get-FileHash -Algorithm SHA256 cyber_books.zip
Step 3 – Scan for malware using ClamAV (Linux) or Windows Defender offline
sudo apt install clamav -y freshclam update virus definitions clamscan --recursive --infected /path/to/books/
On Windows, right-click the folder → Scan with Microsoft Defender → select “Full scan”.
Step 4 – Extract only inside a non-persistent container
unzip -d /tmp/safe_extract cyber_books.zip cd /tmp/safe_extract && ls -la
If any file claims to be a PDF but ends with .exe, .scr, or contains JavaScript – delete immediately.
Step 5 – Open PDFs in a hardened viewer
Disable JavaScript in your PDF reader. For Linux, use `qpdf` to linearize and inspect:
qpdf --linearize suspicious.pdf sanitized.pdf pdfid.py suspicious.pdf checks for /JavaScript, /OpenAction
- Building a Modern Ethical Hacking Lab (Kali + Target)
Books like “Kali Linux & Ethical Hacking” are useless without practice. Here is a minimal yet powerful lab setup using virtualization and containerized targets.
Step 1 – Install Kali Linux on VMware or VirtualBox
Download the official Kali ISO. Verify its hash from Kali.org.
After download, verify on Linux sha256sum kali-linux-2025.1-installer-amd64.iso
Step 2 – Deploy a vulnerable target (Metasploitable 3 or DVWA)
Use Docker for quick deployment:
docker pull vulnerables/web-dvwa docker run --rm -p 80:80 vulnerables/web-dvwa
Now from Kali, scan the target:
nmap -sV -p- 172.17.0.2 IP from docker inspect
Step 3 – Practice web hacking from “Web Hacking” book
Perform a SQL injection on DVWA (low security) using sqlmap:
sqlmap -u "http://172.17.0.2/vulnerabilities/sqli/?id=1&Submit=Submit" --cookie="security=low; PHPSESSID=your_session" --dbs
Step 4 – Capture network traffic
sudo tcpdump -i eth0 -w lab_capture.pcap
Step 5 – Automate recon with a custom script
!/bin/bash simple_enum.sh - from Advanced Penetration Testing concepts echo "Target: $1" nmap -sC -sV $1 -oA enum_$1
Run: `chmod +x simple_enum.sh && ./simple_enum.sh 172.17.0.2`
3. Cloud Security & AWS Hardening Commands
The book collection includes “Cloud Security & AWS Security”. Apply these real-world CLI commands to harden an AWS account.
Step 1 – Install and configure AWS CLI
curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" unzip awscliv2.zip && sudo ./aws/install aws configure enter Access Key, Secret, region
Step 2 – Enforce MFA for all IAM users
aws iam list-users --query 'Users[].UserName' --output text | xargs -n1 aws iam create-virtual-mfa-device --virtual-mfa-device-name mfa-{} --user-name {}
Step 3 – Detect publicly exposed S3 buckets
aws s3api list-buckets --query 'Buckets[?contains(Name, <code>public</code>) == <code>true</code>]' --output table aws s3api get-bucket-acl --bucket YOUR_BUCKET_NAME
Step 4 – Enable CloudTrail for audit logging
aws cloudtrail create-trail --name SecurityTrail --s3-bucket-name your-cloudtrail-bucket --is-multi-region-trail aws cloudtrail start-logging --name SecurityTrail
Step 5 – Use AWS Security Hub to auto-remediate
aws securityhub enable-security-hub --tags "Env=Production"
aws securityhub get-findings --filters '{"ComplianceStatus": [{"Value": "FAILED", "Comparison": "EQUALS"}]}'
4. Windows Security Audit & PowerShell Commands
Books on Security Audit Guides often focus on Windows environments. Use these commands to assess a Windows machine.
Step 1 – Check for insecure services
Get-Service | Where-Object {$<em>.StartType -eq 'Automatic' -and $</em>.Status -ne 'Running'}
Step 2 – Audit local user password policies
net accounts secedit /export /cfg secpolicy.inf cat secpolicy.inf | Select-String "PasswordComplexity", "MinimumPasswordLength"
Step 3 – Enumerate scheduled tasks that run as SYSTEM
Get-ScheduledTask | Where-Object {$_.Principal.UserId -eq "SYSTEM"} | Get-ScheduledTaskInfo
Step 4 – Monitor for suspicious network connections
Get-NetTCPConnection -State Established | Select-Object LocalPort, RemoteAddress, OwningProcess
Step 5 – Apply Windows Defender Application Control (WDAC)
New-CIPolicy -Level Publisher -FilePath C:\WDAC\policy.xml ConvertFrom-CIPolicy -XmlFilePath C:\WDAC\policy.xml -BinaryFilePath C:\WDAC\policy.bin Add-SignerRule -FilePath C:\WDAC\policy.xml -CertificatePath C:\Certs\trusted.cer
- API Security Testing (From Web Hacking & Interview Prep)
Modern web hacking includes API flaws. Use this step-by-step to test for broken object level authorization (BOLA).
Step 1 – Set up Postman or curl for token-based auth
Assuming a target like `https://api.example.com/v1/users/1001`
Extract JWT from login response
TOKEN=$(curl -s -X POST https://api.example.com/login -d '{"user":"test","pass":"test"}' | jq -r '.token')
Step 2 – Attempt BOLA by changing user ID
curl -H "Authorization: Bearer $TOKEN" https://api.example.com/v1/users/1002
If you get data for user 1002, the API is vulnerable.
Step 3 – Fuzz API endpoints using ffuf
ffuf -u https://api.example.com/v1/users/FUZZ -w /usr/share/wordlists/dirb/common.txt -H "Authorization: Bearer $TOKEN"
Step 4 – Mitigate on the server side
Implement resource-based checks in code (Node.js example):
app.get('/api/users/:id', (req, res) => {
if (req.user.id !== req.params.id && !req.user.isAdmin) {
return res.status(403).send('Unauthorized');
}
// fetch user
});
Step 5 – Automate detection with OWASP ZAP API scan
zap-api-scan.py -t https://api.example.com/swagger.json -f openapi -r report.html
What Undercode Say:
- Always treat shared security book archives as untrusted; verify hashes, scan for malware, and open in isolated environments before reading.
- Hands-on labs (Kali + vulnerable containers) turn static PDF knowledge into operational skills – the commands above provide a ready-to-use framework for web, cloud, and API hacking.
The LinkedIn post offers a one-click download, but professional practitioners must balance accessibility with security hygiene. Using sandboxed verification, modern exploitation techniques (sqlmap, ffuf, tcpdump), and cloud hardening (AWS CLI, Security Hub) transforms theory into defense. The provided Linux/Windows snippets are production-ready for audit, testing, and remediation. Never run untrusted code or open unknown PDFs on your host OS – always use disposable VMs. The real value of any cybersecurity book lies not in the file itself, but in the reproducible labs you build from it.
Prediction:
As AI-generated malware and zero-click exploits become commonplace, shared educational archives will be prime vectors for supply-chain attacks on security professionals. Expect platforms like LinkedIn to enforce mandatory cryptographic signatures and sandboxed previews for all downloadable technical content within 18 months. Meanwhile, the divide between “book learners” and “lab builders” will deepen – only those who instrument verification workflows (like the commands above) will stay ahead of attackers weaponizing training materials.
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IT/Security Reporter URL:
Reported By: Priombiswas Infosec – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
