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Introduction
Ransomware operations have evolved far beyond simple file encryption. Modern cybercriminal groups are now building malware capable of spreading across entire enterprise environments within minutes, combining stealth, privilege escalation, defense evasion, and military-grade encryption into a single attack chain. One of the latest examples of this dangerous evolution is “The Gentlemen” ransomware, a rapidly growing ransomware-as-a-service (RaaS) platform that has already impacted organizations worldwide.
Unlike traditional ransomware families that focus mainly on encrypting local systems, The Gentlemen introduces an aggressive worm-like propagation model designed to compromise every reachable machine across a network. The malware leverages multiple simultaneous lateral movement techniques, ensuring that even if several attack paths fail, another method may still succeed. This makes containment extremely difficult once initial access is achieved.
Tracked by Microsoft Threat Intelligence as Storm-2697, the operators behind The Gentlemen are financially motivated cybercriminals who initially ran the ransomware privately before expanding into a full affiliate-based RaaS ecosystem. Their collaboration with BreachForums further increases the risk of large-scale attacks because it allows penetration testers, access brokers, and ransomware affiliates to participate in campaigns using the malware.
The ransomware specifically targets Windows environments and uses advanced cryptographic mechanisms such as Curve25519 and XChaCha20 to ensure strong per-file encryption. Combined with double extortion tactics that include data theft before encryption, victims face not only operational disruption but also public exposure of sensitive information if ransom demands are not met.
The Rise of The Gentlemen RaaS Operation
The Gentlemen ransomware emerged during mid-2025 as a relatively closed cybercriminal operation. Over time, the group transitioned into a ransomware-as-a-service business model, allowing affiliates to conduct attacks using the malware infrastructure maintained by the operators.
This shift significantly expanded the ransomware’s reach. By partnering with BreachForums, the group gained direct access to cybercriminal communities specializing in stolen credentials, initial access brokerage, penetration testing services, and underground infrastructure sales. Such partnerships dramatically increase the number of active attackers capable of deploying the ransomware.
Microsoft observed attacks affecting organizations in healthcare, transportation, education, finance, and multiple other sectors across North America, Europe, Asia, Africa, and South America. This global targeting pattern highlights the ransomware’s operational maturity and the growing professionalization of cybercrime ecosystems.
Command-Line Flexibility Makes the Malware Highly Customizable
One of the most dangerous aspects of The Gentlemen ransomware is the extensive command-line control available to attackers. Operators can define encryption speed, propagation behavior, privilege escalation, target paths, persistence settings, and cleanup operations directly through runtime arguments.
The malware supports modes such as:
Local system encryption
Network share encryption
Full dual-phase encryption
Silent execution
Self-propagation
Free-space wiping
Self-deletion
The –full parameter is especially dangerous because it launches separate processes for encrypting local drives and network shares simultaneously. This dual-execution architecture maximizes impact while maintaining privilege separation between user-level and SYSTEM-level contexts.
Encryption speed parameters such as –fast, –superfast, and –ultrafast allow attackers to balance stealth and speed. Instead of encrypting entire large files, the malware partially encrypts strategic chunks, corrupting data while dramatically reducing processing time.
Built-In Operator Authentication
The malware contains a hardcoded execution password embedded directly within the binary. Without the correct password, execution immediately terminates.
Although simple in design, this mechanism prevents accidental activation and limits unauthorized use if the malware sample is leaked or intercepted. However, security researchers can still bypass this protection through reverse engineering and static analysis.
SYSTEM Privilege Escalation Through Scheduled Tasks
When instructed to run with SYSTEM privileges, the ransomware creates scheduled tasks that relaunch the malware using elevated permissions.
This tactic allows the ransomware to bypass certain access restrictions and encrypt protected system locations inaccessible to standard users. It also improves the malware’s ability to terminate security services, manipulate backups, and access locked files.
The malware additionally uses internal environment variables to distinguish between the primary execution process and elevated background encryption workers.
Aggressive Defense Evasion Techniques
The Gentlemen ransomware aggressively disables security protections before encryption begins.
The malware:
Disables Microsoft Defender real-time monitoring
Adds exclusions for its own executable
Excludes the entire C: drive from scanning
Deletes Volume Shadow Copies
Clears Windows event logs
Removes PowerShell command histories
Deletes Defender diagnostic files
Removes forensic evidence
These actions are specifically designed to prevent detection, slow down incident response, and eliminate recovery options.
The malware also terminates large numbers of processes and services associated with:
Databases
Backup systems
Endpoint detection and response tools
Virtualization software
Remote management utilities
Microsoft Exchange
Office applications
Accounting software
By stopping these services, the ransomware ensures that files become writable and accessible for encryption.
Layered Persistence Mechanisms
Persistence is achieved through both scheduled tasks and registry modifications.
The malware creates startup tasks that execute under both SYSTEM and user contexts. It also writes autorun registry keys into both HKLM and HKCU locations.
This layered persistence design ensures that the ransomware survives reboots and continues execution even if one persistence method is removed.
Network Discovery and Share Enumeration
The ransomware actively scans mapped network drives and UNC shares. It enables Windows discovery services and firewall rules to improve visibility across enterprise environments.
The malware enumerates:
Mounted volumes
Cluster Shared Volumes
Network shares
Existing mapped drives
Remote hosts
This extensive reconnaissance phase helps maximize the number of systems reachable for encryption and lateral movement.
Advanced Cryptography With Curve25519 and XChaCha20
The encryption architecture used by The Gentlemen is highly sophisticated.
For every file, the malware:
Generates a unique ephemeral Curve25519 key pair
Performs ECDH key exchange
Derives encryption keys dynamically
Uses XChaCha20 stream cipher encryption
Stores reconstruction data in file footers
The underlying cryptographic model can be represented as:
ECDH(Private ephemeral
,Public
operator
)→Shared Secret→XChaCha20 Key
This per-file cryptographic isolation ensures that every encrypted file has a unique key and nonce combination, preventing reuse vulnerabilities commonly seen in poorly designed ransomware families.
Partial Encryption Increases Speed and Destruction
Files smaller than 1 MB are fully encrypted. Larger files use a chunk-based encryption strategy where only selected regions are encrypted.
The ransomware divides large files into three chunks distributed across the file structure:
Beginning
Middle
End
Even partial corruption is enough to render databases, archives, and virtual disks unusable.
Encryption percentages vary depending on execution parameters:
Default mode: approximately 27% total encryption
Fast mode: approximately 9%
Superfast mode: approximately 3%
Ultrafast mode: approximately 0.9%
This approach dramatically accelerates encryption speed during large-scale attacks.
Worm-Like Self Propagation Makes It Extremely Dangerous
The self-propagation engine is arguably the ransomware’s most alarming capability.
Once the –spread argument is enabled, the malware transforms into a self-spreading network worm capable of infecting multiple systems automatically.
The ransomware uses:
PsExec
WMI
PowerShell remoting
Scheduled tasks
Remote services
SMB shares
WinRM
Remote process creation
Instead of relying on a single lateral movement technique, the malware executes all methods independently. Even if most techniques fail, one successful execution is enough to continue propagation.
Microsoft identified up to 21 remote execution attempts per target host.
This redundancy significantly increases infection success rates in enterprise environments.
Free Space Wiping Eliminates Recovery Opportunities
If configured with the –wipe option, the ransomware overwrites all available free disk space with random data.
This prevents forensic recovery of deleted files, cached content, or remnants of original unencrypted data. Combined with Volume Shadow Copy deletion, recovery becomes extremely difficult without backups.
Self-Deletion Minimizes Forensic Evidence
The ransomware uses temporary batch scripts to delete its own executable after encryption completes.
This tactic reduces the amount of forensic evidence left behind and complicates incident investigation efforts.
Microsoft Defender Detection and Hunting Support
Microsoft published extensive detection guidance for Defender customers, including:
Threat analytics reports
Advanced hunting queries
Defender alerts
Sentinel integrations
Indicators of compromise
Security Copilot integrations
Known detections include:
Ransomware behavior alerts
Backup deletion warnings
Suspicious wallpaper changes
Data exfiltration indicators
Human-operated ransomware detections
Organizations using Microsoft Defender XDR gain improved visibility into propagation behavior and encryption activities associated with The Gentlemen ransomware.
Deep Analysis
The Gentlemen Represents the Industrialization of Ransomware
The most concerning aspect of The Gentlemen is not merely its encryption capability, but the operational maturity behind its design. This is no longer “commodity ransomware” created by amateur cybercriminals. The malware reflects a highly structured development process similar to enterprise software engineering.
The use of modular command-line arguments, layered persistence, hybrid cryptography, redundant lateral movement, and automated defense suppression demonstrates that ransomware operators now think like software vendors.
Multi-Vector Propagation Changes Incident Response Dynamics
Traditional ransomware response strategies often focus on isolating infected machines before lateral movement occurs. However, The Gentlemen compresses this timeline dramatically.
Because the malware simultaneously launches multiple remote execution methods, defenders may lose containment opportunities within minutes. A single missed endpoint could re-seed the infection across the network.
This behavior resembles historical worm outbreaks such as WannaCry and NotPetya, but with significantly more advanced encryption and operational control.
Partial Encryption Is a Strategic Evolution
Many organizations still assume slower encryption equals better detection opportunities. The Gentlemen challenges this assumption by encrypting only small portions of large files.
Even encrypting less than 1% of strategic file regions can destroy database integrity, corrupt archives, and cripple virtualization infrastructure. This gives attackers maximum destruction with minimal execution time.
The strategy also reduces CPU utilization spikes, helping the malware avoid behavioral detection.
The Abuse of Legitimate Administrative Tools Is Critical
The ransomware heavily abuses legitimate Windows administration utilities:
PsExec
WMI
Scheduled Tasks
SMB
WinRM
This “living off the land” methodology makes detection significantly harder because many of these tools are commonly used by administrators.
Security teams relying solely on signature-based antivirus solutions will struggle against such attacks because the malicious activity often appears operationally legitimate.
Backup Systems Are Explicitly Targeted
The malware aggressively terminates backup and recovery software before encryption begins.
This reflects a broader ransomware trend where attackers prioritize destroying restoration capabilities before launching encryption. Modern ransomware operations understand that reliable backups are the biggest threat to ransom profitability.
The inclusion of free-space wiping further shows that operators aim to eliminate every possible recovery path.
Double Extortion Is Becoming Standard Practice
The Gentlemen uses double extortion tactics by stealing sensitive information before encryption.
This tactic changes ransomware from a pure availability attack into both a confidentiality and reputational crisis. Even organizations capable of restoring systems from backups may still face regulatory penalties, public exposure, and legal risks if stolen data is leaked.
This is especially dangerous for healthcare, finance, and government sectors handling sensitive personal information.
Cryptographic Design Shows Professional Development
The ransomware’s use of Curve25519 and XChaCha20 reflects modern cryptographic best practices.
Unlike older ransomware families that reused keys or implemented flawed encryption logic, The Gentlemen appears designed to avoid cryptographic weaknesses that could enable free decryption.
This dramatically reduces the likelihood of universal decryptor development by researchers.
Ransomware-as-a-Service Continues to Expand
The partnership with BreachForums highlights the growing commercialization of ransomware.
Today’s ransomware ecosystem includes:
Initial access brokers
Malware developers
Negotiation specialists
Data leak operators
Affiliate recruiters
Infrastructure providers
Cybercrime has effectively become an underground industry with specialization similar to legitimate businesses.
Security Teams Must Focus on Lateral Movement Detection
Defenders often focus heavily on malware payload detection while overlooking lateral movement visibility.
The Gentlemen demonstrates why monitoring remote execution activity is now essential. Indicators such as unusual PsExec usage, abnormal WMI calls, remote scheduled task creation, and unauthorized SMB activity should trigger immediate investigation.
Zero Trust Architectures Are Becoming Mandatory
Flat enterprise networks dramatically increase ransomware propagation success.
Organizations implementing Zero Trust principles, network segmentation, privileged access management, and restricted lateral movement controls will be significantly more resilient against threats like The Gentlemen.
Without segmentation, a single compromised endpoint can rapidly become a full enterprise compromise.
Commands and Codes Related to
Disable Defender Example Used by Attackers
Set-MpPreference -DisableRealtimeMonitoring $true
Delete Shadow Copies
cmd
vssadmin delete shadows /all /quiet
Clear Event Logs
cmd
wevtutil cl System
wevtutil cl Security
wevtutil cl Application
PsExec Remote Execution Example
cmd
psexec.exe \TARGET -s -d malware.exe
WMI Remote Process Creation
cmd
wmic /node:TARGET process call create "malware.exe"
Detect Suspicious Scheduled Tasks
PowerShell
Get-ScheduledTask | Where-Object {$_.TaskName -like "Update"}
Check Defender Status
PowerShell
Get-MpComputerStatus
What Undercode Say:
Ransomware Is Becoming More Autonomous
The Gentlemen ransomware reflects a dangerous transition from manual cyber extortion operations into semi-autonomous destructive ecosystems. Attackers no longer need extensive technical expertise once access is obtained. The malware itself handles propagation, privilege escalation, persistence, defense evasion, and destruction automatically.
The Combination of Speed and Propagation Is the Real Threat
Encryption alone is not what makes this ransomware terrifying. The real threat is the simultaneous combination of rapid encryption and aggressive lateral movement. Even highly mature organizations may struggle to isolate infected systems before the malware spreads.
Traditional Antivirus Alone Is No Longer Enough
Signature-based protection cannot reliably stop ransomware families that heavily abuse native Windows administration tools. Behavioral analytics, EDR telemetry, privilege management, and network segmentation are now essential defensive requirements.
The Use of Legitimate Tools Creates Detection Blind Spots
Because the ransomware relies heavily on PowerShell, PsExec, WMI, SMB, and scheduled tasks, defenders face an enormous challenge distinguishing malicious activity from legitimate administrative operations.
Attackers understand that hiding within normal enterprise behavior dramatically improves operational success.
Double Extortion Will Continue Growing
The combination of data theft and encryption creates maximum psychological pressure on victims. Even organizations with strong backup strategies remain vulnerable to reputational damage, lawsuits, and regulatory consequences.
This trend will likely remain dominant across future ransomware operations.
Self-Wiping and Artifact Removal Reflect Maturity
The malware’s ability to erase logs, wipe free space, remove PowerShell histories, and self-delete shows increasing operational discipline among ransomware developers.
This significantly complicates forensic analysis and attribution efforts.
Cross-Industry Targeting Shows Opportunistic Strategy
The ransomware does not appear limited to one vertical. Instead, it opportunistically targets organizations based on accessibility, exposed services, and exploitable credentials.
Healthcare and finance remain especially vulnerable due to operational urgency and high-value data.
Enterprise Flat Networks Remain a Huge Problem
Many organizations still maintain overly permissive network architectures. Once attackers obtain administrative credentials, lateral movement becomes trivial.
The Gentlemen ransomware was clearly designed to exploit exactly these kinds of environments.
Microsoft’s Defensive Guidance Highlights Modern Security Priorities
The recommendations emphasize cloud-delivered protection, attack surface reduction, automated remediation, tamper protection, and EDR block mode.
These are increasingly becoming baseline security requirements rather than optional enterprise features.
Ransomware-as-a-Service Is Scaling Cybercrime Globally
The RaaS model dramatically lowers the barrier to entry for cybercriminals. Skilled malware developers can now distribute payloads to affiliates worldwide, multiplying attack frequency and geographic reach.
This industrialized structure is likely to define the next generation of ransomware operations.
Fact Checker Results
✅ Microsoft Threat Intelligence publicly tracks The Gentlemen ransomware operators as Storm-2697 and confirmed the malware uses aggressive self-propagation techniques.
✅ The ransomware genuinely uses Curve25519 and XChaCha20 cryptography with per-file ephemeral keys, making decryption without attacker keys extremely difficult.
❌ There is currently no public evidence that universal free decryption tools exist for The Gentlemen ransomware victims.
Prediction
Ransomware Will Become More Worm-Like
⚠️ Future ransomware families will increasingly integrate autonomous propagation engines similar to classic worms, enabling enterprise-wide compromise within extremely short timeframes.
Native Windows Tool Abuse Will Intensify
⚠️ Attackers will continue abusing PowerShell, WMI, WinRM, SMB, and scheduled tasks because these tools blend into legitimate administrative activity and bypass traditional security controls.
AI-Assisted Cybercrime Operations May Expand
⚠️ As ransomware groups mature operationally, AI-powered automation for phishing, privilege escalation, lateral movement analysis, and victim negotiation may become standard components of future RaaS ecosystems.
🕵️📝Let’s dive deep and fact‑check.
References:
Reported By: www.microsoft.com
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