ShinyHunters’ Salesforce Exploits: How Voice Phishing Bypasses MFA

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Introduction

ShinyHunters, a notorious cybercriminal group, is exploiting Salesforce environments through sophisticated voice phishing (vishing) attacks. By impersonating IT support, they trick employees into authorizing malicious third-party apps, granting attackers persistent access. Major corporations like Qantas, Allianz Life, and LVMH have already fallen victim, highlighting the urgent need for stronger session security beyond traditional MFA.

Learning Objectives

  • Understand how ShinyHunters bypass MFA using social engineering.
  • Learn critical Salesforce security measures to prevent unauthorized app access.
  • Implement continuous session monitoring and Conditional Access Policies (CAPs).

You Should Know

1. How Attackers Exploit Salesforce OAuth Tokens

Attackers trick users into approving malicious OAuth tokens via vishing. Once authorized, these tokens grant persistent access.

Mitigation Command (Salesforce CLI):

sfdx force:auth:web:login --setalias SecureOrg --instanceurl https://login.salesforce.com

Steps:

1. Log in to Salesforce CLI.

  1. Use the `–setalias` flag to label the session securely.

3. Monitor authorized apps via:

sfdx force:org:list

Revoke suspicious tokens immediately.

2. Enforcing Conditional Access Policies in Salesforce

Salesforce Session Policies can restrict logins based on IP, device, and risk level.

Setup Command:

sfdx force:mdapi:deploy -d ./session-policies -w 5

Steps:

  1. Create a `session-policies` folder with a `SessionSettings` metadata file.

2. Define policies like:

<SessionSettings>
<sessionTimeout>2</sessionTimeout>
<ipRangeStart>192.168.1.1</ipRangeStart>
<ipRangeEnd>192.168.1.254</ipRangeEnd>
</SessionSettings>

3. Deploy using the CLI to enforce restrictions.

3. Detecting Malicious Connected Apps

Attackers often hide malicious apps under legitimate names.

Audit Command:

sfdx force:data:soql:query -q "SELECT Id, Name, CreatedDate FROM ConnectedApplication"

Steps:

  1. Run the SOQL query to list all connected apps.

2. Check `CreatedDate` for recent suspicious entries.

3. Revoke unknown apps via:

sfdx force:data:record:delete -s ConnectedApplication -i APP_ID

4. Implementing Step-Up Authentication

Require re-authentication for high-risk actions.

Salesforce Setup:

  1. Navigate to Setup > Security Controls > Session Settings.

2. Enable “High-Assurance Session Required” for sensitive operations.

API Enforcement (Apex):

if (Auth.SessionManagement.getCurrentSession().getSecurityLevel() != 'HIGH') {
throw new AuthException('Step-up authentication required.');
}

5. Monitoring User Login Anomalies

Use Salesforce Event Monitoring to detect unusual behavior.

Query Login Events:

sfdx force:data:soql:query -q "SELECT EventType, LoginUrl, UserId FROM LoginEvent WHERE LoginTime = LAST_N_DAYS:7"

Steps:

1. Export login data for analysis.

  1. Look for logins from unusual IPs or devices.

6. Blocking Unmanaged Devices via MDM

Integrate Salesforce with Mobile Device Management (MDM) solutions like Microsoft Intune.

Conditional Access Policy (Azure CLI):

az policy assignment create --name 'Salesforce-Device-Compliance' --policy <policy-ID> --params '{"requireCompliantDevice": true}'

Steps:

1. Enforce device compliance before granting access.

2. Block jailbroken or unapproved devices.

7. Revoking Stolen Tokens Instantly

If a token is compromised, revoke it immediately.

Salesforce CLI Command:

sfdx force:user:password:token:revoke -u [email protected]

Steps:

1. Identify compromised accounts.

  1. Run the command to invalidate all active sessions.

What Undercode Say

  • Key Takeaway 1: MFA alone is insufficient—attackers bypass it via social engineering.
  • Key Takeaway 2: Continuous session validation and strict OAuth controls are critical.

Analysis:

ShinyHunters’ tactics reveal a shift from brute-force attacks to psychological manipulation. Companies must adopt zero-trust principles, enforcing real-time risk assessments. Salesforce’s built-in security tools, when properly configured, can mitigate these threats, but user education remains vital.

Prediction

As AI-powered vishing becomes more convincing, we’ll see a surge in similar attacks across SaaS platforms. Organizations that fail to implement behavioral analytics and adaptive authentication will face increased breaches in 2024–2025. Proactive security upgrades are no longer optional—they’re a necessity.

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Reported By: Dvuln Shinyhunters – Hackers Feeds
Extra Hub: Undercode MoN
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