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Introduction:
Leaked credentials have officially dethroned phishing and exploited vulnerabilities as the primary method for cyber attackers to gain initial access to corporate networks. A recent report by Cyberint, a Check Point company, highlights a dramatic shift in the threat landscape, with Southeast Asia and Brazil emerging as significant outliers in this global trend. This article provides the technical command-line and tool-based knowledge security professionals need to defend against this pervasive threat.
Learning Objectives:
- Understand how to proactively hunt for and identify leaked company credentials across the web and dark web.
- Implement defensive hardening measures to mitigate the damage from credential-based attacks.
- Master the use of key tools and scripts for auditing, monitoring, and responding to credential exposure.
You Should Know:
- Hunting for Leaked Corporate Credentials with HIBP CLI
Verified command:
Install the HIBP CLI tool pip install hibp Check a specific email address against HIBP (replace [email protected]) hibp -e [email protected] Check an entire list of emails from a file 'emails.txt' hibp -f emails.txt --all
Step‑by‑step guide: HaveIBeenPwned (HIBP) is a critical repository of breached data. The command-line interface (CLI) allows security teams to programmatically check a list of employee emails against the database. First, install the `hibp` package via Python’s pip. The `-e` flag checks a single email, while `-f` processes a file containing a list of emails. The `–all` flag ensures it checks against all pastes and breaches. Integrate this into regular audit scripts to continuously monitor for new exposures.
2. Auditing Active Directory for Kerberoastable Accounts
Verified command:
Using PowerShell to find all service accounts vulnerable to Kerberoasting
Get-ADUser -Filter {ServicePrincipalName -ne "$null"} -Properties ServicePrincipalName, PasswordLastSet, LastLogonDate | Where-Object {$<em>.PasswordLastSet -lt (Get-Date).AddDays(-180) -or $</em>.LastLogonDate -lt (Get-Date).AddDays(-180)}
Step‑by‑step guide: Kerberoasting is a common attack leveraging leaked domain credentials to target service accounts with weak encryption. This PowerShell command, executed on a domain-joined machine with the Active Directory module, queries all user accounts with a Service Principal Name (SPN). It then filters for accounts with passwords older than 180 days or that haven’t been used recently, which are prime targets. Regularly auditing and strengthening these passwords is crucial.
3. Implementing LAPS for Local Administrator Password Management
Verified command:
Check if LAPS is installed on a client (PowerShell)
Get-WindowsFeature -Name "RSAT-LAPS"
Check the current LAPS password expiration for a specific computer (PowerShell)
Get-ADComputer -Identity "COMPUTER_NAME" -Properties ms-Mcs-AdmPwd, ms-Mcs-AdmPwdExpirationTime | Select-Object Name, ms-Mcs-AdmPwd, @{Name="Expiration";Expression={[bash]::FromFileTime($_.'ms-Mcs-AdmPwdExpirationTime')}}
Step‑by‑step guide: The Local Administrator Password Solution (LAPS) ensures unique, complex, and regularly rotated passwords for local administrator accounts across a domain, nullifying the value of a single leaked local admin hash. The first command verifies the LAPS RSAT tool is installed. The second command queries Active Directory to check the current LAPS-managed password and its expiration time for a specific computer, which is vital for auditing compliance.
4. Detecting Pass-the-Hash Attacks with Windows Event Logs
Verified command:
PowerShell to query Security event log for specific event IDs indicative of Pass-the-Hash
Get-WinEvent -FilterHashtable @{LogName='Security'; ID=4624} | Where-Object {$<em>.Properties[bash].Value -eq 9} | Select-Object TimeCreated, @{Name='Account';Expression={$</em>.Properties[bash].Value}}, @{Name='SourceIP';Expression={$_.Properties[bash].Value}}
Step‑by‑step guide: A primary use for leaked credentials is lateral movement via Pass-the-Hash (PtH). This PowerShell command queries the Security event log for successful logons (Event ID 4624) and filters for logon type 9, which is commonly associated with network-level authentication that could indicate PtH activity. Correlate the `SourceIP` with unusual locations or known malicious IPs to identify potential breaches in progress.
5. Enforcing Multi-Factor Authentication (MFA) via Conditional Access
Verified command:
Azure AD PowerShell: Check for users without MFA registration (requires Connect-AzureAD first)
Get-AzureADUser -All $true | ForEach-Object {
$mfa = Get-AzureADUserRegisteredDevice -ObjectId $<em>.ObjectId
if (-not $mfa) {
$</em>.DisplayName + " - " + $_.UserPrincipalName
}
}
Step‑by‑step guide: MFA is the most effective technical control to mitigate leaked credentials. This Azure AD PowerShell script connects to your tenant and iterates through all users, checking for those who have not registered any MFA methods (like the Microsoft Authenticator app). The output is a list of user display names and UPNs who are non-compliant, allowing admins to target enforcement policies or user education.
- Blocking Known Breached Passwords with Azure AD Password Protection
Verified command:
Check the current Azure AD Password Protection policy status (on-premises DC) Import-Module AzureADPasswordProtection Get-AzureADPasswordProtectionDCAgent Get-AzureADPasswordProtectionProxy
Step‑by‑step guide: Azure AD Password Protection automatically blocks users from setting passwords that are known to be weak or that have appeared in previous breaches. The feature consists of a proxy service and a DC agent installed on domain controllers. These PowerShell commands verify the health and status of these components, ensuring the service is active and protecting your environment from the use of known-compromised passwords.
7. Configuring Account Lockout Policies to Thwart Brute-Forces
Verified command:
Check current account lockout policy on a Windows system secedit /export /cfg secpolicy.txt && find "LockoutBadCount" secpolicy.txt && find "ResetLockoutCount" secpolicy.txt && find "LockoutDuration" secpolicy.txt
Step‑by‑step guide: A strong account lockout policy is a fundamental defense against automated brute-force attacks using leaked passwords. This command exports the local security policy to a text file and then parses it for the key lockout policy values: `LockoutBadCount` (number of failed attempts before lockout), `ResetLockoutCount` (time before counter resets), and `LockoutDuration` (length of lockout). A common recommended baseline is a threshold of 10 invalid attempts with a 15-minute lockout duration.
What Undercode Say:
- The attack surface has fundamentally shifted from technical software exploits to human and credential-based weaknesses. Defense must now prioritize identity as the primary security perimeter.
- Proactive hunting for exposed credentials is no longer optional; it is a core requirement of modern threat intelligence and vulnerability management programs.
- analysis: The Cyberint report signals a maturation in the criminal ecosystem. Why spend time and resources developing a zero-day exploit when millions of valid username and password pairs are freely available on Telegram channels and dark web marketplaces? This commoditization of access lowers the barrier to entry for low-skilled attackers and allows advanced groups to operate more stealthily, as using legitimate credentials often generates less suspicion than a novel exploit. Defenders must pivot their strategies accordingly, investing heavily in identity governance, MFA enforcement, and continuous credential exposure monitoring. The geographic outliers suggest targeted campaigns or differing security postures in those regions, which require tailored defensive and educational measures.
Prediction:
The dominance of leaked credentials will only intensify, fueling a massive expansion of initial access brokers (IABs) within the cybercriminal economy. We will see a rise in AI-powered tools that automatically filter, validate, and weaponize colossal datasets of leaked credentials at an unprecedented scale, making manual password spraying attacks obsolete. This will force a widespread adoption of passwordless authentication technologies (e.g., FIDO2 security keys) and more sophisticated AI-driven identity threat detection and response (ITDR) platforms that can baseline user behavior to detect credential misuse in real-time, regardless of whether the password is technically correct.
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IT/Security Reporter URL:
Reported By: Mthomasson Leaked – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
