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Introduction: When Trusted Security Tools Become Attack Weapons
Cyberattacks are becoming increasingly difficult to recognize because modern ransomware groups are learning to operate inside the same technical ecosystem used by defenders. Instead of relying exclusively on custom malware, attackers can now abuse legitimate forensic, administration, and troubleshooting utilities to collect information, move through networks, and prepare victims for extortion.
The latest investigation into the Interlock ransomware operation offers a striking example of this evolution. During a March 2026 incident, Sophos Emergency Incident Response investigators discovered that Interlock operators had used Volatility3 and WinPmem, two legitimate tools widely associated with digital forensics and incident response, to capture Windows memory and extract valuable credential material.
The technique is particularly concerning because neither tool is inherently malicious. Volatility3 is an open-source memory-forensics framework used by security professionals to investigate compromised machines, while WinPmem is designed to acquire physical memory for forensic analysis. In the wrong hands, however, these same capabilities can become powerful instruments for credential theft.
Interlock: A Ransomware Group Built Around Direct Operations
Sophos tracks Interlock under the name GOLD EMBRACE, a ransomware operation that has been active since September 2024. The group has primarily focused on organizations in North America and Europe, with victims reportedly including organizations in critical infrastructure, healthcare, education, and other sectors where operational disruption can have serious consequences.
Unlike large ransomware ecosystems that operate as ransomware-as-a-service businesses, Interlock appears to follow a more vertically integrated model. The group is believed to maintain control over much of the attack chain itself, from initial access and malware development to data theft, lateral movement, and ransomware deployment.
That structure can make Interlock especially dangerous because the attackers are not necessarily dependent on a large network of affiliates. A smaller, technically capable team can move quickly, customize its operations, and adapt its tooling to the environment it has compromised.
Double Extortion Raises the Stakes
Interlock also follows the now-familiar double-extortion model. The attackers do not simply encrypt files and demand payment for a decryption key. They first steal sensitive information and then use the threat of publication as additional leverage.
The
This model changes the security equation. A company can potentially recover its servers without paying a ransom, yet still face regulatory, legal, financial, and reputational consequences because confidential information has already left the organization.
The Attackers Chose Memory Over Traditional Credential Theft
The most technically interesting part of the incident was Interlock’s decision to collect Windows memory and analyze it for credential material.
Rather than relying solely on conventional password-stealing malware, the operators acquired a memory image from the compromised Windows endpoint. That image could then be examined offline using Volatility3.
The basic memory-acquisition command observed during the investigation was:
winpmem_mini_x64_rc2.exe mem.raw
This command creates a physical-memory image named mem.raw.
Once the memory image had been captured, the attackers used Volatility3 to search for credentials.
Volatility3: A Legitimate Tool With Offensive Potential
The first notable command was:
vol.exe -f .mem.raw windows.hashdump.Hashdump
The -f parameter tells Volatility which memory image should be analyzed. The windows.hashdump.Hashdump plugin is designed to recover Windows account hash information from an appropriate memory image.
From a forensic perspective, this is entirely legitimate. Investigators routinely analyze memory to understand what happened during an intrusion and to identify credentials, processes, injected code, malware artifacts, and other evidence.
From an
Why NTLM Hashes Matter to Attackers
Windows authentication environments can contain valuable credential material in memory and related system structures. NTLM password hashes are particularly interesting because attackers may attempt to crack them offline or use them in pass-the-hash scenarios where applicable.
The important point is that attackers do not necessarily need to know the original plaintext password immediately.
If a compromised account has administrative privileges, access to shared resources, or permissions across multiple systems, obtaining its authentication material can significantly expand the attacker’s reach.
This is why credential theft is often the bridge between an initial compromise and a much larger ransomware deployment.
Cached Domain Credentials Provide Another Route
Interlock also executed another Volatility3 command:
vol.exe -f .mem.raw windows.cachedump.Cachedump
The purpose of this module is to examine cached domain credential information available in the memory image.
Cached authentication artifacts can reveal information about users who previously authenticated to the system. Depending on the environment and the artifacts available, this information may help attackers identify valuable accounts and understand how users connect to the wider corporate domain.
The broader lesson is important: memory itself can become a credential repository from an attacker’s perspective.
WinPmem Shows Why Tool Names Are Not Enough
The use of WinPmem is especially interesting because security teams cannot simply create an alert saying “WinPmem detected = ransomware.”
That would generate too many false positives.
Digital forensics teams, incident responders, malware researchers, and system administrators may legitimately use memory-acquisition utilities. Volatility3 can likewise appear on machines during authorized investigations.
The real detection opportunity therefore comes from context.
A forensic utility executed by an authorized incident-response team during a scheduled investigation is normal. The same utility suddenly appearing on a workstation that has no approved forensic activity, launched through an unusual process chain and followed by suspicious PowerShell activity, is a very different situation.
ClickFix Was the Beginning of the Intrusion
The attack reportedly began with a ClickFix-style social-engineering technique, demonstrating that sophisticated ransomware operations do not necessarily require a highly technical initial exploit.
The victim was searching ChatGPT for information related to Dynamics 365 when they were redirected to a legitimate website that was believed to have been compromised.
The page then presented instructions designed to convince the user to copy and paste a malicious command into the Windows Run dialog.
This is the central idea behind ClickFix-style attacks: rather than silently exploiting a vulnerability, the attacker manipulates the victim into executing the attack themselves.
Social Engineering Turns the User Into the Execution Engine
The effectiveness of this technique comes from abusing trust.
A user may believe that a website has detected a problem and is providing a quick fix. The instructions may appear technical enough to look legitimate, while the attacker relies on the victim to perform the final execution step.
In this incident, the attackers reportedly gained access to clipboard information and persuaded the employee to execute the supplied command.
This approach bypasses an important psychological barrier. The victim is no longer merely clicking a malicious attachment. They are actively entering or pasting the command themselves, which can make traditional security controls less effective.
PowerShell Delivered the Next Stage
After the user executed the malicious command, PowerShell became part of the attack chain.
The observed activity reportedly downloaded PowerShell code from:
afshapiro[.]com
The campaign then retrieved a remote-access trojan from:
104.236.109[.]139
The malware established persistence, giving the attackers a foothold they could potentially maintain after the initial execution.
The PowerShell execution also reportedly used wildcard path matching, a technique that can make command-line activity less obvious and potentially interfere with simplistic detection rules.
From Initial Access to Credential Harvesting
The progression of the intrusion is what makes the incident particularly revealing.
The attackers did not immediately need to deploy ransomware.
Instead, the operation appears to have followed a broader sequence:
Social engineering → command execution → PowerShell → remote access → persistence → memory acquisition → credential extraction → lateral movement potential → data theft → ransomware.
This illustrates how modern ransomware should be viewed as an intrusion campaign rather than simply an encryption event.
By the time the ransomware payload appears, the attackers may already have spent considerable time inside the organization.
Deep Analysis: Detecting Abuse of Volatility3 and WinPmem
Establish Baseline Usage
Security teams should first determine whether forensic utilities are normally present in their environment.
Useful questions include:
Which endpoints legitimately run WinPmem?
Which administrators are authorized to use Volatility3?
Are forensic investigations documented?
Are memory dumps expected on production workstations?
Which tools are allowed to acquire physical memory?
Without this baseline, defenders cannot distinguish legitimate forensic activity from malicious use.
Monitor Suspicious Memory Acquisition
A useful starting point for Windows defenders is to search for unusual executions of memory-acquisition utilities.
Example PowerShell hunting command:
Get-WinEvent -LogName Security |
Where-Object { $_.Message -match "winpmem|vol.exe|mem.raw" }
The exact telemetry available will depend on Windows auditing, endpoint detection products, and event collection configuration.
Search for Suspicious Process Chains
Defenders should pay close attention when memory-forensics tools appear after PowerShell, scripting engines, browser activity, or remote-access software.
A suspicious chain might resemble:
browser.exe
└── powershell.exe
└── winpmem.exe
└── vol.exe
└── credential extraction
The individual processes may be legitimate. The sequence is what makes the behavior suspicious.
Hunt for Memory Dump Files
Organizations can also search for newly created memory-image files:
Get-ChildItem -Path C:\ -Filter .raw -Recurse -ErrorAction SilentlyContinue
A more targeted search can look for suspicious filenames:
Get-ChildItem -Path C:\Users,C:\Temp,C:\Windows\Temp <code>-Include mem.raw,memory.raw,.dmp,.raw</code> -Recurse -ErrorAction SilentlyContinue
Large memory images appearing unexpectedly on employee workstations should receive immediate attention.
Investigate Volatility3 Execution
Security teams should monitor command lines containing Volatility plugins associated with credential analysis:
windows.hashdump.Hashdump
windows.cachedump.Cachedump
These commands have legitimate forensic applications, but their appearance outside an approved investigation can be a high-value signal.
Hunt for ClickFix Activity
Browser telemetry is equally important.
Security teams should investigate suspicious web pages that instruct users to:
Open Windows Run.
Press keyboard shortcuts.
Copy commands.
Paste commands into PowerShell.
Execute commands claiming to “fix” browser or account problems.
These behavioral indicators can be more useful than simply blocking a particular domain.
Monitor PowerShell Downloads
Defenders should also hunt for PowerShell downloading content from unusual domains or raw IP addresses.
A basic investigation command could include:
Get-WinEvent -FilterHashtable @{
LogName='Microsoft-Windows-PowerShell/Operational'
} -ErrorAction SilentlyContinue |
Where-Object {
$_.Message -match 'Download|Invoke-WebRequest|WebClient|IEX|FromBase64String'
}
This is not a complete detection strategy, but it can help identify suspicious PowerShell behavior during an investigation.
Examine Network Connections
The combination of PowerShell, an unfamiliar external IP address, and a new remote-access process should be treated as a high-priority investigation.
For example:
Get-NetTCPConnection |
Where-Object {$_.State -eq "Established"} |
Select-Object LocalAddress,LocalPort,RemoteAddress,RemotePort,OwningProcess
Defenders can then map suspicious connections back to processes.
Look Beyond File-Based Detection
One of the most important lessons from this incident is that endpoint detection cannot depend exclusively on malicious files.
Volatility3 is not malware.
WinPmem is not malware.
PowerShell is not malware.
A browser is not malware.
A remote-access tool is not automatically malware.
Yet these legitimate components can become extremely dangerous when combined in a malicious sequence.
Credential Theft Can Accelerate Lateral Movement
Once attackers obtain authentication material, the incident can move from one compromised endpoint to an enterprise-wide problem.
Attackers may use compromised credentials to identify additional systems, access shared resources, connect to servers, and search for privileged accounts.
This is why protecting administrator credentials remains one of the most effective ransomware defenses.
Organizations should minimize administrative privileges, separate privileged accounts from everyday accounts, enforce strong authentication, and monitor abnormal authentication behavior.
Memory Forensics Is Now Part of the Ransomware Battlefield
Memory has always been valuable to forensic investigators because it can contain information that never reaches disk.
Running processes, network connections, loaded modules, authentication artifacts, encryption keys, injected code, and other transient information may exist in RAM.
For defenders, memory analysis can reveal what happened.
For attackers, memory acquisition can reveal how to move deeper into the environment.
That dual-use characteristic is increasingly important in modern cybersecurity.
The Abuse of Legitimate Tools Is Becoming a Major Trend
Interlock’s use of Volatility3 and WinPmem reflects a larger trend in cybercrime: living off the land.
Attackers increasingly prefer tools that already have legitimate reputations. This reduces the need to introduce obviously malicious utilities and can complicate automated detection.
The same principle applies to PowerShell, WMI, PsExec, remote administration utilities, scripting engines, cloud administration tools, and many other legitimate technologies.
The challenge for defenders is therefore shifting from “Is this tool malicious?” toward “Is this use of the tool expected?”
Why Traditional Antivirus Can Miss This Activity
Traditional antivirus products are strongest when they can identify malicious binaries, known signatures, or suspicious files.
But a legitimate forensic executable may have no malicious signature.
The attacker can therefore potentially operate with tools that look harmless individually.
Behavioral security becomes essential.
The important question is no longer simply whether vol.exe exists. It is whether vol.exe suddenly appeared on a finance employee’s workstation after a suspicious PowerShell command and was used to extract credentials.
That context can transform an apparently benign event into a critical security signal.
What Undercode Say: Ransomware Has Become an Intelligence Operation
The Real Attack Happens Before Encryption
The encryption stage receives most of the attention, but modern ransomware campaigns often spend significant time collecting intelligence before deploying the final payload.
Credentials Are More Valuable Than Files
Encrypted files are valuable to the victim. Authentication credentials can be more valuable to the attacker because they may unlock additional systems.
Legitimate Tools Are Becoming Offensive Infrastructure
Security tools are increasingly being repurposed by threat actors because trusted software can blend into normal administrative activity.
Context Is More Important Than Reputation
A tool’s reputation cannot determine whether its execution is safe. The surrounding process tree, user, host, timing, and network activity matter more.
ClickFix Shows the Power of Human Manipulation
The incident also demonstrates that attackers can bypass complicated technical defenses by persuading one employee to execute a command.
Search Engines and AI Assistants Are Part of the Attack Surface
The fact that the victim was searching for Dynamics 365 information through ChatGPT highlights a broader reality: attackers increasingly manipulate the web environment around users rather than targeting users exclusively through traditional phishing emails.
Compromised Websites Can Become Delivery Platforms
A legitimate website can provide attackers with credibility that a newly registered malicious domain may never achieve.
PowerShell Remains a Critical Monitoring Target
PowerShell continues to provide enormous legitimate value to administrators, but its ability to download and execute code makes it particularly attractive to attackers.
Credential Dumping Should Trigger Immediate Investigation
Unexpected use of credential-extraction functionality should be treated as a potentially serious incident, especially when it occurs outside an authorized forensic investigation.
Memory Images Deserve Security Monitoring
Organizations frequently monitor executable files and scripts but may overlook the sudden creation of large .raw or memory-dump files.
Ransomware Defenses Must Cover the Entire Attack Chain
Blocking ransomware encryption alone is not enough. Organizations need to detect initial access, persistence, credential theft, lateral movement, and data exfiltration.
Privileged Accounts Remain High-Value Targets
A single compromised privileged account can dramatically increase the blast radius of an intrusion.
Least Privilege Becomes Even More Important
Reducing unnecessary privileges limits what stolen credentials can accomplish after compromise.
Identity Security Is Ransomware Security
Strong authentication, privileged access controls, and abnormal-login detection are increasingly central to ransomware defense.
Endpoint Telemetry Should Capture Command Lines
Knowing that PowerShell executed is useful. Knowing exactly what PowerShell executed is far more valuable.
Process Trees Tell the Story
Security teams should correlate browser, PowerShell, memory-acquisition, forensic, and remote-access processes rather than investigating each alert independently.
The
Ransomware operators benefit from remaining inside the environment long enough to understand its structure and identify valuable systems.
Persistence Changes the Economics of Detection
Finding an attacker early can prevent an enormous downstream investigation involving credential resets, legal obligations, data exposure, and recovery.
Double Extortion Makes Backups Alone Insufficient
Backups can help defeat encryption, but they cannot automatically undo data theft.
Data Loss Prevention Has Become Ransomware Prevention
Monitoring unusual outbound data transfers can help identify attackers before they reach the final extortion phase.
Network Segmentation Can Limit Damage
Even if credentials are stolen, properly segmented environments can make lateral movement significantly harder.
Administrative Workstations Need Special Protection
High-privilege endpoints should be isolated and monitored because their compromise can provide attackers with powerful access.
Security Teams Need Forensic Awareness
Defenders must understand the same tools attackers are abusing.
Forensic Tools Should Not Be Blind Spots
The fact that a tool is designed for defenders does not mean it should be excluded from security monitoring.
Detection Rules Need Exceptions
Authorized forensic investigations should be explicitly documented so security systems can distinguish legitimate use from suspicious execution.
But Exceptions Must Be Narrow
Broadly allowing forensic utilities without monitoring creates an opportunity for attackers to hide inside those exceptions.
Incident Response Teams Should Preserve Memory Carefully
When a system is suspected of compromise, volatile evidence can disappear quickly. Memory acquisition may be essential for understanding the intrusion.
Attackers Know This Too
The same evidence defenders want to preserve may contain the credentials attackers are trying to steal.
AI Will Not Remove the Need for Human Analysis
Automated systems can correlate enormous quantities of telemetry, but unusual combinations of legitimate tools still require contextual reasoning.
Ransomware Groups Are Becoming More Adaptable
Interlock’s behavior demonstrates how modern ransomware operators can combine social engineering, legitimate utilities, scripting, remote access, credential theft, and extortion into one operation.
The Biggest Security Mistake Is Treating Tools as Good or Bad
Software does not have to be malicious to be dangerous.
The Command Line Often Reveals Intent
Arguments such as windows.hashdump.Hashdump and windows.cachedump.Cachedump provide much more insight than the simple presence of vol.exe.
Detection Must Follow Behavior
Modern security programs should focus increasingly on sequences of actions rather than isolated indicators.
The Best Time to Stop Ransomware Is Before Encryption
Once ransomware starts encrypting thousands of files, response becomes a race against time.
Credential Theft Is One of the Most Valuable Warning Signs
Detecting credential harvesting early can interrupt the attack before it reaches domain-wide deployment.
Interlock Is a Warning for Every Windows Environment
The techniques described in this incident are not limited to one organization or one ransomware family.
Security Teams Should Assume Legitimate Tools Can Be Misused
That assumption creates stronger detection strategies without requiring organizations to ban useful forensic utilities.
The Final Lesson Is Simple
The next ransomware warning may not look like ransomware at all. It may look like a forensic investigation running on the wrong computer.
✅ Interlock Has Been Active Since 2024
The supplied report identifies Interlock as a ransomware operation active since September 2024 and notes Sophos’ tracking designation of GOLD EMBRACE. The group has been associated with attacks against organizations in North America and Europe.
✅ Volatility3 and WinPmem Are Legitimate Tools
Both utilities have legitimate security and forensic applications. Their appearance on a system does not independently establish malicious activity, which makes contextual detection especially important.
✅ The Credential-Extraction Commands Are Technically Significant
The reported Volatility3 commands specifically target Windows credential-related artifacts. Recovering authentication material can provide attackers with opportunities for password cracking, credential abuse, and lateral movement.
✅ ClickFix Is a Real Social-Engineering Technique
The technique described in the incident matches the broader ClickFix attack pattern, where victims are manipulated into copying and executing commands under the belief that they are fixing a technical problem.
✅ PowerShell Can Be Used Legitimately and Maliciously
PowerShell is a standard Windows administration technology. Its use should therefore be evaluated according to command content, parent process, destination, user context, and surrounding behavior rather than automatically treated as malicious.
❌ Volatility3 or WinPmem Should Not Be Automatically Blocked
Blocking legitimate forensic tools everywhere could interfere with incident response and investigations. A better approach is controlled execution, allowlisting where appropriate, strong administrative controls, and behavioral monitoring.
❌ A Memory Dump Does Not Automatically Mean Ransomware
Memory acquisition has legitimate forensic purposes. The significance comes from the circumstances surrounding the acquisition, particularly unexpected execution, credential extraction, suspicious persistence, and external communications.
Prediction
(+1) Defensive Monitoring Will Become More Behavioral
The cybersecurity industry is likely to place even greater emphasis on behavioral detection as attackers increasingly abuse legitimate software. Security platforms will need to understand process relationships, command-line arguments, authentication behavior, and network activity instead of relying primarily on malware signatures.
(+1) Memory Analysis Will Become a Standard Security Control
As attackers recognize the value of RAM, organizations are likely to invest more heavily in memory-forensics capabilities. Endpoint products may increasingly detect suspicious memory acquisition and credential-oriented analysis before attackers can exploit the results.
(+1) ClickFix Campaigns Will Face Stronger Defenses
As awareness of ClickFix-style attacks grows, browsers, operating systems, endpoint security platforms, and security-awareness programs are likely to introduce stronger warnings around copy-and-paste execution instructions.
(-1) Legitimate Security Tools Will Remain Attractive to Attackers
The fundamental problem will not disappear. Attackers have a strong incentive to abuse trusted utilities because completely blocking them is difficult and often undesirable.
(-1) Ransomware Will Continue Moving Beyond Encryption
The future of ransomware is increasingly about identity, data, persistence, and extortion rather than simply encrypting files. Organizations that focus only on ransomware executables may discover the attack too late.
Final Takeaway: The Tools You Trust Can Become the Tools Attackers Trust
The Interlock incident is a powerful reminder that modern ransomware is no longer simply a malicious executable waiting to encrypt a hard drive.
It can begin with a search result, move through a compromised website, rely on a convincing ClickFix instruction, execute PowerShell, establish remote access, capture Windows memory, extract authentication material, steal sensitive information, and only then deploy ransomware.
The most unsettling part is that several components of this chain may look completely legitimate when examined independently.
That is precisely why modern defense must focus on behavior and context.
A forensic tool on a security
Interlock’s campaign demonstrates that the boundary between defensive and offensive tooling is becoming increasingly blurred. For defenders, the answer is not to abandon trusted tools. It is to monitor how, where, when, and why those tools are being used.
Because in the next ransomware attack, the most dangerous program on the machine may not be malware at all.
It may be a tool your security team installed years ago.
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