On-Prem vs Cloud Penetration Testing: Different Approaches, Different Findings
Cloud and on-premises penetration tests use different methodologies because the attack surfaces and primary risks are fundamentally different. On-prem testing focuses on network protocols, Active Directory, and lateral movement. Cloud testing focuses on IAM misconfiguration, exposed APIs, and identity-based privilege escalation. Most enterprises need both — and most penetration testers specialize in one or the other.
Detailed Comparison
Primary Attack Vectors
IAM misconfiguration, exposed S3/blob storage, vulnerable Lambda/Function App, leaked secrets, identity escalation.
Network services, AD privilege escalation, weak passwords, unpatched systems, lateral movement.
Authentication Model
IAM roles, federated identity, OAuth tokens, service principals — heavy focus on identity.
Active Directory, NTLM, Kerberos, local accounts — focus on credential attacks.
Scope Definition
Cloud account boundaries, IAM principals, exposed services, application APIs, infrastructure as code.
IP ranges, domains, Active Directory, internal/external network boundaries.
Methodology
Cloud-specific frameworks (PACU, CloudSploit, ScoutSuite, Prowler) plus manual analysis.
PTES, OSSTMM, OWASP, NIST 800-115; tools include Nmap, Nessus, BloodHound, Mimikatz.
Provider Authorization
AWS, Azure, GCP allow testing without prior approval; check provider AUP for excluded actions.
Internal authorization only required.
Key Findings
Overprivileged IAM roles, public S3 buckets, hardcoded keys in Lambda, missing encryption, IMDSv1 enabled.
Kerberoasting, AS-REP roasting, NTLM relay, unpatched MS17-010, weak GPO settings, SMB v1 enabled.
Tester Skillset
Cloud architecture expertise, IAM analysis, IaC review, programming skills.
Network protocols, AD attacks, exploit development, OS internals.
Duration
1-3 weeks depending on cloud account count and scope.
1-3 weeks depending on network size and complexity.
Cost
Typically $15,000-$60,000 for a single cloud account; more for multi-cloud.
Typically $10,000-$50,000 for a small to medium network.
Compliance Coverage
Required by SOC 2, ISO 27001, FedRAMP, PCI DSS for cloud-hosted systems.
Required by PCI DSS for in-scope networks, HIPAA, SOC 2, ISO 27001.
Our Recommendation
Test what you have. If your stack is cloud-native, prioritize cloud penetration testing — most findings will be IAM-related. If your stack is on-prem, prioritize traditional network testing. Hybrid environments need both, and the tester should be experienced in the relevant target. Don't hire a network pentester to test AWS — they will miss the IAM misconfigurations that constitute most cloud risk.
Frequently Asked Questions
Yes, all three allow customer-initiated penetration testing without advance approval, with some restrictions. AWS prohibits DDoS-style testing; Azure has similar restrictions. Always read the provider's testing AUP before starting.
Kubernetes is its own discipline — RBAC analysis, container escape techniques, exposed Kubernetes API server, secrets management. Kubernetes pen testing is increasingly a separate engagement from cloud pen testing, especially for organizations heavily invested in EKS, AKS, GKE.
No. CSPM tools (Wiz, Prisma Cloud, Lacework) continuously scan for misconfigurations — fast, broad, automated. Cloud penetration testing chains misconfigurations into actual attack paths and validates real exploitability. Both have value: CSPM for breadth, pen testing for depth.
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Need Help Deciding?
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