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Introduction:
Identity and Access Management (IAM) is the new perimeter in cybersecurity—one compromised credential can hand attackers the keys to an entire enterprise. When a major financial institution like Banco de Chile actively recruits for an “Ingeniero Ciberseguridad – Identidad y Accesos” (as seen in this LinkedIn job post: https://lnkd.in/dN5B2in6), it signals both high demand and critical risk exposure. This article extracts technical IAM hardening techniques, Linux/Windows commands, and training pathways from that real-world opportunity, giving you actionable steps to secure any organization’s identity layer.
Learning Objectives:
- Implement least privilege access controls and multi-factor authentication (MFA) on Windows/Linux systems.
- Detect and mitigate common IAM attacks like Kerberoasting, Pass-the-Hash, and privilege escalation.
- Configure cloud-native IAM policies (Azure AD, AWS IAM) and API security for identity endpoints.
You Should Know
1. Hardening Active Directory & Local Identity Stores
Attackers routinely target AD because it controls access to everything. The job role at Banco de Chile focuses on identity—so start with hardening directory services.
Step‑by‑step guide for Windows AD hardening:
- Enable advanced audit policies to log all authentication events.
- Enforce SMB signing and LDAP channel binding to prevent relay attacks.
- Use Protected Users group and restrict NTLM where possible.
Windows Commands (run as Administrator):
List all domain admins (find over-privileged accounts) Get-ADGroupMember "Domain Admins" | Select-Object name Enable LDAP signing reg add "HKLM\SYSTEM\CurrentControlSet\Services\NTDS\Parameters" /v "LDAPServerIntegrity" /t REG_DWORD /d 2 /f Dump local user hashes (for auditing – never in production) reg save HKLM\SAM SAM.save Use tools like mimikatz only in authorized labs
Linux commands for identity hardening (SSSD / LDAP client):
Enforce strong password hashing (SHA512) sudo authselect select sssd with-silent-lastlog Restrict sudo to specific groups echo "%wheel ALL=(ALL) ALL" >> /etc/sudoers.d/10-wheel Verify LDAP over TLS ldapsearch -x -H ldaps://your-dc -b "dc=bancochile,dc=cl"
What this does: Prevents pass‑the‑hash, restricts lateral movement, and ensures only least‑privilege access. Test in a lab before deploying.
- Implementing Zero‑Trust SSO & MFA for All Access
The “Identidad y Accesos” role implies managing single sign‑on (SSO) and MFA. Attackers bypass weak MFA (SMS) daily; use phishing‑resistant methods.
Step‑by‑step guide to deploy SSO with OAuth2/OIDC (using Azure AD as example):
– Register an application in Azure AD → Certificates & secrets → add client secret.
– Configure redirect URIs and set token lifetimes to 60 minutes max.
– Enforce Conditional Access policies requiring phishing‑resistant MFA (WebAuthn/FIDO2).
Commands (Azure CLI):
Login to Azure tenant
az login
Create a service principal for IAM
az ad sp create-for-rbac --name "BancoChile-IAM-App" --role Contributor
List all enterprise apps and their MFA policies
az ad app list --show-mine --query "[].{name:displayName,oauth2Permissions:oauth2Permissions}"
Windows / Linux for MFA integration with RADIUS:
On a Linux RADIUS proxy (FreeRADIUS) to enforce MFA sudo apt install freeradius freeradius-ldap Edit /etc/freeradius/3.0/mods-available/ldap – point to AD sudo systemctl restart freeradius
What this does: Ensures every authentication request requires a second factor, drastically reducing credential theft impact.
- Privileged Access Management (PAM) – JIT & JEA
PAM is central to the identity engineer’s job. Just‑in‑time (JIT) and just‑enough‑administration (JEA) prevent standing privileges.
Step‑by‑step guide (Windows + Linux):
- For Windows: Configure Privileged Identity Management (PIM) in Azure AD to request role activation with approval.
- For Linux: Use `sudo` with timeouts and `pam_access` to restrict login times.
Windows PowerShell (JEA configuration):
Create a role capability file
New-PSRoleCapabilityFile -Path .\IamAuditor.psrc -ModulesToImport @{ModuleName='ActiveDirectory'}
Register the JEA endpoint
Register-PSSessionConfiguration -Name "IamSession" -RunAsCredential (Get-Credential) -RoleDefinitionPath .\IamAuditor.psrc
Linux commands for JIT sudo:
Add timestamp_timeout to force re-authentication every 5 minutes echo "Defaults timestamp_timeout=5" >> /etc/sudoers.d/timeout Use /etc/security/access.conf to restrict login hours echo "-:ALL EXCEPT (john, iam-admin): ALL" >> /etc/security/access.conf
What this does: Eliminates always‑on admin accounts; attackers can’t abuse privileges that don’t exist at rest.
- API Security for Identity Endpoints (OAuth & JWT Hardening)
Modern IAM exposes REST APIs for user provisioning and authentication. Misconfigured APIs lead to account takeover.
Step‑by‑step guide to secure identity APIs:
- Validate JWT signatures with a public key from a trusted issuer.
- Rotate client secrets automatically (every 30 days).
- Implement rate limiting on `/token` endpoints to prevent brute force.
Linux command to test JWT validation (using `jwt-cli`):
Install jwt-cli npm install -g jwt-cli Decode a JWT from a request jwt decode 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...' Verify signature with RSA public key jwt verify --key ./public.pem --alg RS256 'jwt_string'
Windows / Linux – API rate limiting with NGINX (reverse proxy for identity API):
limit_req_zone $binary_remote_addr zone=login:10m rate=5r/m;
location /api/v1/token {
limit_req zone=login burst=10 nodelay;
proxy_pass http://identity-backend;
}
What this does: Prevents credential stuffing and replay attacks on authentication endpoints, directly aligning with the job’s focus on secure access.
- Cloud IAM Hardening (Azure AD / AWS IAM)
Banco de Chile likely uses hybrid or cloud identity. Misconfigured cloud IAM is a top cloud breach vector.
Step‑by‑step guide for Azure AD:
- Enable Identity Protection to detect risky sign‑ins.
- Remove legacy authentication (POP3, IMAP, SMTP) via Conditional Access.
- Set access reviews for external identities every 30 days.
Azure CLI commands:
Block legacy authentication
az rest --method patch --url "https://graph.microsoft.com/v1.0/policies/authenticationMethodsPolicy/authenticationMethodConfigurations/legacy" --body '{"state":"disabled"}'
List all guest users and their roles
az ad user list --filter "userType eq 'Guest'" --query "[].{name:displayName,mail:userPrincipalName}"
Enforce MFA registration for all users
az ad group member add --group "All Users" --member-id "mfa-policy-id"
AWS CLI (if they use AWS workloads):
Attach policy to deny all actions except from a specific IP aws iam put-role-policy --role-name IamEngineerRole --policy-name DenyOutsideIP --policy-document file://deny.json List unused roles (potential attack surface) aws iam list-roles --query "Roles[?RoleLastUsed==null]"
What this does: Closes cloud identity backdoors – no more orphaned accounts or legacy protocols.
6. Detecting & Mitigating Kerberoasting and Pass‑the‑Hash
Attackers often target service accounts (Kerberoasting) and hash theft. This is mandatory knowledge for any identity security engineer.
Step‑by‑step detection on Windows:
- Monitor Event ID 4769 (Kerberos service ticket) for anomalous TGS requests.
- Use honeypot service accounts with high entropy passwords.
PowerShell to hunt Kerberoasting:
Get all service accounts with SPNs (prime targets)
Get-ADUser -Filter {ServicePrincipalName -ne "$null"} -Properties ServicePrincipalName, PasswordLastSet
Check for accounts using RC4 encryption (weak)
Get-ADUser -Filter {ServicePrincipalName -ne "$null"} -Properties msDS-SupportedEncryptionTypes | Where-Object {$_.'msDS-SupportedEncryptionTypes' -ne 24}
Linux – detect pass‑the‑hash using auditd:
Monitor access to /etc/passwd and /etc/shadow sudo auditctl -w /etc/passwd -p rwa -k passwd_access sudo ausearch -k passwd_access -ts today Dump NTLM hashes (pen test only) python3 secretsdump.py -hashes :ntlm_hash -just-dc target_admin@target_ip
Mitigation commands (disable RC4, force AES):
On Windows DC: set domain-wide to reject RC4 Set-ADDomain -AuthenticationPolicy "AESOnly"
What this does: Stops golden ticket / pass‑the‑hash attacks dead – identity engineers must know these by heart.
7. Training & Certification Pathways (LinkedIn Job Tie‑In)
The post shows Tony Moukbel holds 58 certifications in cybersecurity, IT, AI, and electronics. For the Banco de Chile IAM role, prioritize these:
- Microsoft Certified: Identity and Access Administrator Associate (SC-300)
- Certified Identity and Access Manager (CIAM)
- CompTIA Security+ (foundational)
- Practical courses on TCM Security or Hack The Box: “Kerberos Attacks” and “Active Directory Enumeration”
Free training resources extracted from the context:
- LinkedIn Learning (Premium shown in user’s UI) offers “Cybersecurity for IAM” courses.
- Undercode Testing (referenced in the profile) – likely a testing platform; relevant for hands‑on labs.
Use this command to self‑assess your IAM knowledge (Linux):
Enumerate LDAP anonymously to find misconfigurations (with permission) ldapsearch -x -H ldap://target-domain -b "dc=example,dc=com" "objectClass=user" sAMAccountName If successful without credentials – you have a major IAM flaw.
What this does: Maps the job post directly to a learning path. Apply using the link: https://lnkd.in/dN5B2in6 after mastering these skills.
What Undercode Say
- Key Takeaway 1: IAM is no longer just “who has access” – it’s a real‑time battle against credential replay, pass‑the‑hash, and misconfigured APIs. Every command and policy above directly mitigates attack techniques used in 90% of breaches (Verizon DBIR).
- Key Takeaway 2: The Banco de Chile job post is a canary in the coal mine: financial firms are desperately seeking engineers who can harden identity across on‑prem AD, cloud SSO, and API gateways. Mastery of
ldapsearch,az ad, and JWT validation separates junior admins from true identity experts.
Analysis: Combining Linux/Windows commands with cloud IAM tools creates a hybrid defence that covers modern enterprise architectures. The role explicitly demands “Identidad y Accesos” – that means you must automate privilege revocation, implement JIT elevations, and log every authentication attempt. The techniques shown (Kerberoasting detection, Azure AD MFA policies, NGINX rate limiting) are exactly what the bank’s SOC will audit. Failing to rotate service account passwords or leaving legacy protocols enabled will get your CV binned. Use the job link to apply, but only after you’ve practiced these steps in a lab – the interview will test them live.
Prediction
By 2027, AI‑driven identity analytics will autonomously revoke compromised sessions in real‑time, but the underlying IAM principles (least privilege, MFA, JIT access) will remain unchanged. The Banco de Chile role is early wave – soon every regional bank will require IAM engineers to integrate passkeys and continuous authentication. However, attackers will shift to AI‑generated phishing that bypasses traditional MFA, making hardware‑backed WebAuthn and behavioural biometrics mandatory. Engineers who master today’s `reg add` commands and tomorrow’s Azure AD continuous access evaluation will become irreplaceable. The job link won’t stay open long – apply now, but more importantly, harden your own identity first.
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Reported By: Leslie Cerro – Hackers Feeds
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