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Introduction:
Modern blue teaming is not about collecting tools—it’s about orchestrating visibility, detection, and response across the entire kill chain. With over 65 tools spanning network discovery, vulnerability management, endpoint monitoring, malware analysis, and threat intelligence, defenders must master both the “what” and the “when” of each capability. This article transforms raw tool lists into actionable blue team tradecraft, delivering verified commands, GPO hardening steps, and forensic workflows that build real security maturity.
Learning Objectives:
- Execute automated network discovery and vulnerability scans using Nmap, Masscan, and OpenVAS to map attack surfaces.
- Deploy Sysmon and Velociraptor for deep endpoint visibility and create custom YARA rules to detect living-off-the-land binaries.
- Apply incident response techniques including payload extraction, script execution prevention, cryptojacking detection, and CyberChef-based malware analysis.
You Should Know:
- Network Discovery & Vulnerability Scanning – From Recon to Remediation
Start with asset discovery using Nmap’s service version detection and then move to vulnerability scanning with Nuclei or OpenVAS. The following commands assume a Linux-based security workstation (Kali, Parrot, or Ubuntu with security tools).
Quick network sweep to discover live hosts (adjust subnet) nmap -sn 192.168.1.0/24 Service and OS detection with script scan (stealthy) nmap -sS -sV -O --script=vuln 192.168.1.100 -oA blue_recon Masscan for high-speed port discovery (rate-limited) sudo masscan -p1-1000 192.168.1.0/24 --rate=1000 -oL masscan_ports.txt Nuclei template-based vulnerability scan (install nuclei first) nuclei -u https://target.internal -t ~/nuclei-templates/ -severity critical,high -o nuclei_results.txt OpenVAS setup (GVM) – Greenbone Vulnerability Manager gvm-setup first-time installation gvm-start greenbone-cli --target 192.168.1.0/24 --scan
Pro tip: Schedule weekly vulnerability scans and feed results into a SIEM (e.g., Kibana/Elastic) for trend analysis. Use Nessus Essentials for authenticated scanning on Windows domains.
2. Endpoint Monitoring with Sysmon and Velociraptor
Windows defenders must deploy Sysmon to capture process creation, network connections, and file changes. Velociraptor adds endpoint visibility and offline collection.
Windows (PowerShell as Admin):
Download and install Sysmon from Microsoft Invoke-WebRequest -Uri "https://live.sysinternals.com/Sysmon64.exe" -OutFile "$env:TEMP\Sysmon64.exe" Install with SwiftOnSecurity configuration & "$env:TEMP\Sysmon64.exe" -accepteula -i https://raw.githubusercontent.com/SwiftOnSecurity/sysmon-config/master/sysmonconfig.xml Verify Sysmon is running Get-Service Sysmon
Velociraptor (server + client):
On Ubuntu server: download and run Velociraptor wget https://github.com/Velocidex/velociraptor/releases/download/v0.7.2/velociraptor-v0.7.2-linux-amd64 chmod +x velociraptor-v0.7.2-linux-amd64 sudo ./velociraptor-v0.7.2-linux-amd64 --config server.config.yaml frontend -v On Windows client: after generating client MSI, install and check: velociraptor.exe --config client.config.yaml interactive
Use Velociraptor to hunt for LOLBins (e.g., wmic, cscript) by running YARA across endpoints. Integrate Sysmon logs with Kibana using Winlogbeat for real-time dashboards.
- Malware Analysis: Payload Extraction with Process Hacker + dnSpy
When analyzing suspicious .NET assemblies, Process Hacker combined with dnSpy reveals hidden payloads without manual deobfuscation. This technique is credited to @embee_research.
Step‑by‑step:
- Download Process Hacker (https://processhacker.sourceforge.io/) and dnSpy (https://github.com/dnSpy/dnSpy).
- Run the suspicious executable in a sandbox or isolated VM.
- Open Process Hacker as Administrator → locate the spawned process (e.g., `powershell.exe` or
wscript.exe). - Right‑click the process → Properties → Memory → locate .NET assembly modules (look for `System.Reflection.Assembly.Load` or
System.AppDomain). - Right‑click the module → Save as → dump the raw assembly to disk.
- Open dnSpy → File → Open → select dumped .dll or .exe. Use dnSpy’s decompiler to inspect IL code and extract strings/URLs.
- Look for XOR‑encoded payloads – use CyberChef (next section) to decode.
Alternative command (Cobalt Strike dump):
Using procdump from Sysinternals procdump -ma <PID> c:\artifacts\process_memory.dmp strings c:\artifacts\process_memory.dmp | findstr /i "http:// https://"
- Prevent Script Execution via Default Application GPO (Windows Hardening)
Threat actors often use.hta,.js,.vba, `.vbs` files disguised as Office documents. Changing the default association to Notepad blocks execution entirely (bluesoul’s tip).
Step‑by‑step (Group Policy):
- Open `gpedit.msc` (Local Group Policy Editor) on Windows Pro/Enterprise.
- Navigate to:
Computer Configuration → Windows Settings → File Associations. - Add entries for each extension:
- Extension: `.hta` → Associated Program: `%SystemRoot%\system32\NOTEPAD.EXE`
– `.js` → `%SystemRoot%\system32\NOTEPAD.EXE`
– `.vbs` → `%SystemRoot%\system32\NOTEPAD.EXE`
– `.vba` → `%SystemRoot%\system32\NOTEPAD.EXE`
– Apply viagpupdate /force. - Test: Double‑click a `.hta` file – it opens in Notepad, no execution.
Manual registry method for standalone systems:
PowerShell Admin ftype htafile=%SystemRoot%\system32\NOTEPAD.EXE %1 ftype JSFile=%SystemRoot%\system32\NOTEPAD.EXE %1 ftype VBSFile=%SystemRoot%\system32\NOTEPAD.EXE %1
- Detect Cryptojacking Malware with Proxy/DNS Logs (Dave Mckay’s method)
Cryptojackers must connect to mining pools – monitor for strings likexmr,pool.com,pool.org,pool.. Implement this in Splunk, Kibana (Elastic), or raw grep.
Splunk query (proxy logs):
index=proxy | where url LIKE "xmr" OR url LIKE "pool.com" OR url LIKE "pool.org" OR host LIKE "pool" | stats count by src_ip, user, url
KQL (Microsoft Sentinel / Azure Log Analytics):
// Replace 'WebProxy' with your table WebProxy | where Url contains "xmr" or Url contains "pool.com" or Url contains "pool.org" or Url contains "pool." | project TimeGenerated, SrcIpAddr, UserName, Url, ResponseCode
Linux command‑line on proxy server:
Check squid access logs
grep -E "(xmr|pool.com|pool.org|pool.)" /var/log/squid/access.log | awk '{print $3,$7}' | sort | uniq -c | sort -nr
Monitor live DNS queries (using tcpdump)
sudo tcpdump -i eth0 -n port 53 -l | grep -E "xmr|pool"
- Remove Null Bytes in CyberChef for Malware Analysis
Malware often embeds null bytes (\x00) to break string extraction. CyberChef’s “Remove null bytes” operation cleans the payload.
CyberChef recipe (https://gchq.github.io/CyberChef/):
– Input: Raw malicious binary or encoded string containing \x00.
– Operation 1: “Remove null bytes” – strips out all zero‑byte characters.
– Operation 2: “From Hex” or “From Base64” depending on encoding.
– Operation 3: “Regular expression” to extract IPs/domains: `\b(?:\d{1,3}\.){3}\d{1,3}\b|\b(?:[a-zA-Z0-9-]+\.)+[a-zA-Z]{2,}\b`
Python alternative:
with open('suspicious.bin', 'rb') as f:
data = f.read()
cleaned = data.replace(b'\x00', b'')
search for URLs
import re
urls = re.findall(b'https?://[^\s]+', cleaned)
print(urls)
- YARA Rule Generation with yarGen to Detect Custom Malware
yarGen creates baseline YARA rules from malware samples, then you refine them for hunting.
Step‑by‑step (Linux):
Clone yarGen git clone https://github.com/Neo23x0/yarGen.git cd yarGen python3 yarGen.py --update Generate rules from a folder of malware samples python3 yarGen.py -m /path/to/malware_samples/ -o my_rules.yar Optional: clean false positives with whitelist python3 yarGen.py -m ./malware/ -w ./whitelist/ -o blue_team_rules.yar
Test YARA rule against a suspicious file:
yara my_rules.yar /path/to/suspicious.exe
Example YARA rule snippet (hiding mining pool strings):
rule Cryptominer_Pool_String {
meta:
description = "Detects hardcoded mining pool domains"
author = "BlueTeam"
strings:
$pool1 = "pool.supportxmr.com" ascii wide nocase
$pool2 = "mine.xmr" ascii nocase
$stratum = "stratum+tcp://" ascii
condition:
any of them
}
What Undercode Say:
- Key Takeaway 1 – Tools do not create maturity; workflows do. Mastering 65+ tools is useless without defined SOPs that connect Nmap discovery → OpenVAS validation → Sysmon detection → Velociraptor hunt → CyberChef analysis → YARA rule persistence.
- Key Takeaway 2 – The most underrated blue team skill is “defensive scripting” – turning raw logs (proxy, DNS, Sysmon) into automated alerts using KQL, Splunk, or simple grep pipelines. The cryptojacking detection example proves that low‑tech string matching still catches advanced miners.
Analysis: The post correctly highlights that modern blue teams must think like attackers – living off the land, evading static signatures, and exploiting misconfigurations. However, the real gap is not tool availability but integration. Most SOCs have Sysmon but don’t aggregate logs; they own Velociraptor but never run hunt packages. The four Blue Team tips (Process Hacker, GPO hardening, proxy mining detection, null byte removal) are immediately actionable and bypass vendor hype. The GitHub collection (65+ tools) serves as a checklist, but the article’s value lies in the how‑to: changing default apps stops script‑based initial access dead, and null byte removal enables manual string extraction when sandboxes fail. Looking ahead, AI‑driven detection will augment these techniques, but fundamentals (asset inventory, log hygiene, GPO lockdown) will remain the foundation of any mature blue team.
Prediction:
Within 18 months, blue teams will shift from “tool‑first” to “outcome‑first” using integrated detection‑as‑code pipelines. The 65+ tools listed will converge into fewer, open‑source platforms (e.g., Velociraptor + Elastic + CyberChef) that embed YARA‑Hunting and automated GPO auditing. AI copilots will suggest YARA rules from proxy logs and write KQL queries on‑the‑fly, but attackers will counter by abusing null‑byte obfuscation and mining‑pool over TLS. The winning blue teams will be those that automate the boring parts (log parsing, rule updates) while keeping human intuition for payload extraction and threat hunting – because no AI can yet replace a defender who knows exactly when to dump memory with Process Hacker.
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IT/Security Reporter URL:
Reported By: Yasinagirbas Blueteam – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
