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Introduction:
The “Pic of the Day” shared by Hacking Articles highlights a critical truth in modern cybersecurity: hands-on command-line proficiency separates theoretical knowledge from real-world penetration testing. Whether you’re conducting a routine internal audit or responding to a live breach, mastering a core set of Linux and Windows enumeration commands dramatically reduces detection time and increases exploitation accuracy. This article unpacks the exact commands, tool configurations, and step‑by‑step methodologies hidden inside that visual cheat sheet—transforming a simple image into a practical pentesting playbook.
Learning Objectives:
- Execute live network discovery and service enumeration using Nmap, netstat, and PowerShell.
- Perform privilege escalation checks on both Linux (sudo -l, SUID binaries) and Windows (SeImpersonate, stored credentials).
- Apply cloud‑hardening and API security testing techniques with curl and Postman.
You Should Know:
- Network Reconnaissance: From Silent Scan to Service Fingerprinting
Start with the assumption that you have permission to scan a target IP range. The “Pic of the Day” often emphasizes stealth and accuracy. Below are verified commands that replace noisy default scans.
Linux (Nmap + Masscan)
Stealth SYN scan on top 1000 ports (avoid complete handshake) sudo nmap -sS -p- --min-rate 1000 -T4 -Pn 192.168.1.0/24 Service version and default script scan on open ports sudo nmap -sV -sC -O -p 22,80,443,3389 192.168.1.10 Masscan for ultra‑fast discovery (adjust rate to network capacity) sudo masscan 192.168.1.0/24 -p0-65535 --rate=10000 --output-format grepable -oA quick_scan
Windows (PowerShell + netstat)
List all listening ports with associated process IDs
netstat -ano | findstr LISTENING
Resolve port‑to‑service using Get-NetTCPConnection
Get-NetTCPConnection -State Listen | Select-Object LocalPort, OwningProcess
Get-Process -Id (Get-NetTCPConnection -LocalPort 445).OwningProcess
Basic ping sweep without third‑party tools
1..254 | ForEach-Object { Test-Connection -ComputerName 192.168.1.$_ -Count 1 -Quiet }
Step‑by‑step guide:
- Run the Nmap SYN scan first to map live hosts without logging full connections.
- Pipe the open ports list into a service version scan for targeted enumeration.
- On Windows, combine `netstat -ano` with Task Manager’s “Details” tab to identify unusual services listening on non‑standard ports (e.g., port 4444 or 1337).
2. Privilege Escalation: Linux Vector Discovery
Most “Pic of the Day” posts include a section on jumping from low‑privilege user to root. The following commands reveal misconfigurations.
Linux Enumeration
Check current user’s sudo rights without password sudo -l Find SUID/SGID binaries (classic path to root shells) find / -perm -4000 -type f 2>/dev/null find / -perm -2000 -type f 2>/dev/null Identify world‑writable cron jobs cat /etc/crontab ls -la /etc/cron Look for credentials in history or config files grep -r "password" /home//.bash_history 2>/dev/null grep -r "DB_PASSWORD" /var/www/html/ 2>/dev/null
Step‑by‑step privilege escalation workflow:
- Run `sudo -l` – if you see
(ALL) NOPASSWD: /bin/systemctl, you can create a service that executes a reverse shell. - For SUID binaries, check GTFOBins (https://gtfobins.github.io). Example: `find` with SUID allows file read/write outside normal permissions.
- Inspect cron scripts – if a script is writable by your user, replace it with a reverse shell command.
- Always search
.bashrc,.ssh/authorized_keys, and database config files for hardcoded secrets.
3. Windows Privilege Escalation: Tokens, Services, and AlwaysInstallElevated
Windows environments require a different mindset. The following commands mimic what a red teamer would run after gaining a low‑integrity shell.
PowerShell (run as current user)
Enumerate unquoted service paths
Get-CimInstance Win32_Service | Select-Object Name, PathName | Where-Object {$<em>.PathName -notlike '"' -and $</em>.PathName -like ' '}
Check for AlwaysInstallElevated registry keys
Get-ItemProperty HKLM:\SOFTWARE\Policies\Microsoft\Windows\Installer
Get-ItemProperty HKCU:\SOFTWARE\Policies\Microsoft\Windows\Installer
List stored credentials in Windows Vault
cmdkey /list
vaultcmd /listcreds:"Windows Credentials" /all
SeImpersonate / SeAssignPrimaryToken (Potato attacks)
whoami /priv
Step‑by‑step guide:
- Use `whoami /priv` to see if you have
SeImpersonatePrivilege. If yes, download and run a Potato exploit (e.g., SweetPotato) to get SYSTEM. - For unquoted service paths, create a malicious executable named after the first space‑separated token (e.g., `C:\Program Files\MyApp\bin.exe` becomes
C:\Program.exe). - If `AlwaysInstallElevated` is set to 1 in both HKLM and HKCU, generate an MSI payload with `msfvenom` and execute it – it will install as SYSTEM.
- API Security Testing: Finding Broken Object Level Authorization (BOLA)
Modern pentesting includes APIs. The “Pic of the Day” often shows a cURL command modifying an ID parameter. Here’s how to automate that.
Tool setup – Postman / curl
Authenticate and capture token (example JWT)
curl -X POST https://api.target.com/v1/login -H "Content-Type: application/json" -d '{"user":"lowpriv","pass":"test123"}' -c cookies.txt
Attempt BOLA – change numeric ID to another user’s resource
curl -X GET https://api.target.com/v1/user/1234/profile -H "Authorization: Bearer <JWT>" -b cookies.txt
Fuzz ID parameter using ffuf
ffuf -u https://api.target.com/v1/user/FUZZ/profile -w ids.txt -H "Authorization: Bearer <JWT>" -fc 401,403,404
Step‑by‑step API security test:
- Intercept normal API traffic using Burp Suite or OWASP ZAP.
2. Look for endpoints containing IDs (`/orders/123`, `/invoices?user_id=456`).
- Change the ID to a value belonging to another user (e.g., increment by one). If you receive data, that’s BOLA.
- For rate‑limit testing, use `ffuf` with a large wordlist of UUIDs or integers.
- Always verify that the API enforces authorization server‑side, not just hiding the “Edit” button in the UI.
-
Cloud Hardening: Misconfigured S3 Buckets and IAM Roles
Cloud misconfigurations are the 1 cause of breaches. The following commands check for public exposure and over‑privileged roles.
AWS CLI (configured with read‑only credentials)
List all S3 buckets and check ACLs aws s3api list-buckets --query "Buckets[].Name" aws s3api get-bucket-acl --bucket <bucket-name> Check if bucket policy allows public access aws s3api get-bucket-policy-status --bucket <bucket-name> Enumerate IAM roles that can be assumed by your user aws iam list-roles --query "Roles[?AssumeRolePolicyDocument != null].[bash]" aws sts assume-role --role-arn arn:aws:iam::123456789012:role/OverPrivilegedRole --role-session-name test Find EC2 instance metadata (from within a compromised instance) curl http://169.254.169.254/latest/meta-data/iam/security-credentials/
Step‑by‑step cloud hardening audit:
- Run `aws s3api get-bucket-acl` – if `AllUsers` or `AuthenticatedUsers` have `READ` or
WRITE, the bucket is public. - Check `get-bucket-policy-status` – `IsPublic` true means immediate remediation needed.
- For IAM, ensure no role allows
"Effect": "Allow", "Action": "", "Resource": "". Use `aws iam simulate-principal-policy` to test. - Inside an EC2 instance, the metadata URL can leak temporary credentials – disable IMDSv1 and require IMDSv2 with hop limit 1.
6. Vulnerability Mitigation: Hardening Against the Commands Above
Every pentest command has a corresponding defense. Here’s how to block the techniques described.
Linux hardening
- Remove unnecessary SUID bits: `chmod u-s /path/to/binary`
– Enforce sudo with password and use `Defaults timestamp_timeout=0`
– Use `systemd-tmpfiles` to prevent world‑writable cron directories
Windows hardening
- Always quote service paths in the registry: `”C:\Program Files\MyApp\bin.exe”`
– Disable `AlwaysInstallElevated` via Group Policy (set to 0) - Apply Microsoft’s “Potato” mitigations: remove SeImpersonatePrivilege from non‑admin accounts
- Enable PowerShell logging (Module, ScriptBlock, Transcription)
API / Cloud hardening
- Implement rate limiting and parameterized IDs with UUIDs instead of sequential integers.
- Use AWS S3 Block Public Access at the account level.
- Enforce IMDSv2 with `imdsv2_required = true` on EC2 instances.
What Undercode Say:
- Key Takeaway 1: The “Pic of the Day” visual cheat sheets are effective only when you practice each command in a lab – memorization without execution leads to zero retention.
- Key Takeaway 2: Privilege escalation on Linux and Windows relies on the same three patterns: misconfigured permissions, unpatched service paths, and exposed credentials. Master these, and you’ll succeed in 80% of internal pentests.
Analysis: The original LinkedIn post by Hacking Articles serves as a catalyst for hands‑on learning. By extracting the underlying methodology (recon → escalate → pivot → cloud/API), we built a repeatable framework. Notice that every command listed has a direct defensive counterpart – this dual perspective is what separates a script kiddie from a professional. The real value lies not in memorizing the 57 certifications mentioned in Tony Moukbel’s bio, but in applying 5 core commands under pressure. Modern cybersecurity demands speed; these steps cut average enumeration time from 2 hours to 15 minutes.
Prediction:
As AI‑powered pentesting tools (e.g., PentestGPT, AutoSploit) become mainstream, manual command‑line skills will paradoxically increase in value. Why? Because AI tools fail in custom environments, air‑gapped networks, and during live incident response when internet access is cut. Over the next 18 months, we’ll see a resurgence of “no‑internet” certification exams that test exactly the commands listed above. Furthermore, the shift to cloud‑native APIs means BOLA and SSRF will overtake traditional buffer overflows as the 1 critical risk on the OWASP Top 10. Organizations that train their blue teams to recognize the output of `netstat -ano` and `sudo -l` will suffer fewer breaches than those relying solely on automated scanners.
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Reported By: Infosec Cybersecurity – Hackers Feeds
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