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Russian hackers have been successfully compromising Microsoft 365 accounts for several months, according to a report by 01Net. These attackers use sophisticated phishing and credential-stuffing techniques to infiltrate corporate email systems, leading to potential data breaches and unauthorized access.
You Should Know: How to Protect Your Microsoft 365 Account
1. Enable Multi-Factor Authentication (MFA)
MFA adds an extra layer of security. Use:
Set-MsolUser -UserPrincipalName [email protected] -StrongAuthenticationRequirements @{}
For Azure AD:
Set-AzureADUser -ObjectId [email protected] -StrongAuthenticationRequirements $mfa
2. Monitor Suspicious Logins
Check sign-in logs in Azure AD:
Get-AzureADAuditSignInLogs -Filter "createdDateTime gt 2023-10-01" | Where-Object {$_.Status.ErrorCode -ne 0}
3. Disable Legacy Authentication
Legacy protocols (like IMAP, POP3) are vulnerable:
Set-OrganizationConfig -OAuth2ClientProfileEnabled $true
4. Implement Conditional Access Policies
Restrict access from risky locations:
New-AzureADMSConditionalAccessPolicy -DisplayName "Block High-Risk Countries" -State "Enabled" -Conditions @(...)
5. Detect and Block Phishing Emails
Use Exchange Online Protection (EOP):
Get-HostedContentFilterPolicy | Set-HostedContentFilterPolicy -PhishSpamAction MoveToJmf
6. Check for Compromised Accounts
Run the Microsoft Secure Score assessment:
Get-MgSecuritySecureScore -Top 10
7. Use Advanced Threat Protection (ATP)
Enable Safe Links and Safe Attachments:
Set-AtpPolicyForO365 -EnableATPForSPOTeamsODB $true
8. Audit and Revoke Suspicious Sessions
List active sessions:
Get-AzureADUser -All $true | Get-AzureADUserRegisteredDevice
Revoke sessions:
Revoke-AzureADUserAllRefreshToken -ObjectId [email protected]
9. Educate Users on Phishing
Train employees to identify phishing attempts using:
Start-M365DSCConfiguration -ConfigurationName "PhishingSimulation"
10. Backup Critical Data
Use Microsoft 365 Backup:
Start-MgBetaDataPolicyOperation -BackupType Full
What Undercode Say
Russian hackers continue evolving their tactics, making Microsoft 365 a prime target. Implementing MFA, disabling legacy auth, and enforcing conditional access are critical. Regular audits and phishing simulations further reduce risks.
Expected Output:
- MFA enforced
- Legacy authentication disabled
- Phishing emails blocked
- Active sessions monitored
- Secure Score improved
For more details, visit: 01Net Report
References:
Reported By: Vincent L – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
