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Introduction: The Myth of the Midnight Hacker Is Finally Falling Apart
For decades, ransomware operators have been portrayed as mysterious cybercriminals lurking behind glowing screens in dark rooms, launching attacks in the middle of the night while the rest of the world sleeps. Movies, television shows, and even some cybersecurity discussions have reinforced this image of the sleepless hacker striking at random hours.
A new large-scale analysis challenges that narrative in dramatic fashion.
After examining 16,699 ransomware leak-site posts published by 200 ransomware groups over a two-year period, researchers uncovered a surprisingly ordinary reality. Instead of operating like chaotic digital outlaws, ransomware groups appear to function much like traditional businesses. They follow work schedules, maintain predictable publishing habits, experience seasonal fluctuations, and continuously evolve through new brands and affiliates.
The findings reveal that ransomware activity peaks during European working hours, follows a conventional weekday pattern, slows dramatically during weekends, and reaches its highest intensity during October. At the same time, the number of active ransomware operations continues to grow despite high-profile law enforcement takedowns.
For security teams, threat intelligence analysts, incident responders, and corporate executives, these findings carry an important message: ransomware is no longer an unpredictable phenomenon driven by a few notorious gangs. It has become a mature criminal ecosystem operating at industrial scale.
A Massive Dataset Offers Rare Visibility Into Ransomware Operations
The study conducted by the Ransomnews Research Team analyzed a substantial dataset consisting of 16,699 leak-site victim disclosures posted by 200 ransomware groups across a 24-month period.
Leak sites serve as public pressure mechanisms used by ransomware operators. When organizations refuse to pay extortion demands, attackers often publish victim names and threaten to release stolen data. These disclosures provide researchers with valuable visibility into ransomware activity patterns.
By examining publication dates, times, group activity, growth trends, and seasonal fluctuations, researchers were able to identify behavioral patterns that are often overlooked in conventional threat intelligence reporting.
Rather than focusing solely on individual ransomware families, the study examined the entire ransomware ecosystem, producing a broader understanding of how cybercriminal operations function in practice.
Ransomware Runs on a Traditional Workweek
One of the most striking discoveries involves the weekly rhythm of ransomware activity.
The data demonstrates a clear preference for weekday operations.
Monday recorded 3,080 leak-site posts across the study period, making it the most active day. Tuesday followed closely with 3,073 posts. By contrast, Sunday generated only 1,189 disclosures.
This difference is not minor.
Sunday activity amounted to less than 40 percent of Monday’s volume, suggesting that ransomware operators largely observe traditional working schedules.
The findings undermine long-standing assumptions that cybercriminal groups operate continuously without regard for time or work-life balance.
Instead, ransomware appears increasingly organized around structured workflows, affiliate management systems, and predictable business-like operations.
For organizations planning defensive strategies, this means staffing decisions should align with actual attacker behavior rather than popular myths.
The Practical Security Implications Are Significant
The study presents an uncomfortable reality for many security operations centers.
Many organizations maintain reduced staffing levels during weekends under the assumption that cyber threats occur randomly and therefore require constant vigilance regardless of timing.
Yet the data suggests that operational resources could be allocated more intelligently.
If ransomware publication activity peaks during weekdays, defenders may need stronger monitoring capabilities during those periods instead of concentrating resources around weekends.
The findings do not suggest ignoring weekend security. Rather, they highlight the importance of matching defensive coverage with real-world adversary behavior.
Understanding attacker schedules can improve alert prioritization, threat hunting activities, incident response readiness, and executive reporting.
European Business Hours Dominate Ransomware Publishing
The hourly breakdown provides even more compelling evidence that ransomware groups operate according to structured schedules.
Researchers found that 50 percent of all leak-site posts occurred within a concentrated eight-hour period between 15:00 and 22:59 UTC.
This timeframe corresponds to:
11:00 AM to 6:00 PM US Eastern Time
4:00 PM to 11:00 PM Central European Time
The concentration strongly suggests that many operators are located within Eastern Europe, Russia, and neighboring regions.
Perhaps most revealing is the quietest hour in the dataset.
At 04:00 UTC, researchers recorded only 215 leak-site posts across two entire years.
That averages to fewer than one ransomware disclosure every four days worldwide.
Such a dramatic drop contradicts the popular image of cybercriminals working primarily through the night.
Instead, attackers appear to publish disclosures during ordinary office hours, reinforcing the view that ransomware has evolved into a structured criminal industry.
Asia-Pacific Security Teams Face a Predictable Challenge
The geographic implications are particularly important for organizations operating in Asia-Pacific regions.
Because ransomware disclosures are concentrated during European working hours, security teams in Asia frequently discover new victim disclosures and intelligence updates when arriving at work the following morning.
This creates a recurring operational challenge.
Threat analysts in countries such as Singapore, Australia, Japan, and South Korea often begin their workdays processing overnight ransomware developments that occurred while regional teams were offline.
Understanding this timing pattern can help organizations optimize intelligence collection workflows and improve morning response procedures.
October Emerges as Ransomware’s Peak Season
Another major finding involves seasonality.
The analysis found a consistent surge in ransomware activity during October.
October 2024 recorded 611 victim disclosures.
October 2025 saw an even larger spike with 1,029 disclosures.
Meanwhile, activity between May and August remained approximately 30 to 40 percent lower than October levels.
The consistency of this trend across multiple years suggests a recurring seasonal effect rather than random fluctuation.
Several explanations may contribute to this phenomenon.
Cybercriminal operators may reduce activity during summer vacation periods. Corporate IT teams may experience staffing shortages during holiday seasons. Some organizations may postpone major security projects during summer months, creating operational gaps that become visible later in the year.
Regardless of the underlying causes, the seasonal pattern appears stable enough for defenders to incorporate into annual security planning.
The Most Active Day Ever Recorded
The study also identified an extraordinary peak event.
On February 24, 2025, ransomware groups collectively published 263 victim disclosures within a single day.
This represents the highest daily disclosure volume observed throughout the entire dataset.
Such spikes highlight the volatility of the ransomware ecosystem and demonstrate how quickly threat levels can escalate during concentrated attack campaigns.
For organizations tracking threat exposure, these surges emphasize the importance of maintaining flexible response capabilities.
The Ransomware Ecosystem Is Growing, Not Shrinking
Perhaps the most controversial finding directly challenges a common industry narrative.
Many cybersecurity discussions focus on major law enforcement operations against groups such as LockBit, AlphV, and RansomHub. These takedowns are often presented as evidence that ransomware is becoming increasingly controlled.
The data suggests the opposite.
Researchers observed only 38 active ransomware brands posting during a single month in May 2024.
By April 2026, that number had increased to 67 active brands.
This represents near doubling of the active ransomware population within less than two years.
Instead of eliminating ransomware, enforcement actions may simply redistribute participants across newly created operations.
The ecosystem adapts faster than many observers realize.
New Groups Rapidly Replace Fallen Giants
The disappearance of major ransomware brands does not necessarily reduce overall threat levels.
When RansomHub ceased activity during early 2025, new operators quickly emerged to absorb displaced affiliates and infrastructure.
One notable example is the ransomware group known as Gentlemen.
Launching in September 2025, the operation accumulated 408 victims within only 246 days.
This rapid growth demonstrates how quickly experienced affiliates can regroup under new branding.
The underlying expertise, malware development capabilities, negotiation tactics, and operational knowledge often survive even when a specific ransomware brand disappears.
As a result, the ecosystem remains remarkably resilient.
Qilin and Akira Lead the Current Ransomware Landscape
Among active operations, Qilin has become the most prolific ransomware group identified in the dataset.
The group accumulated 1,690 victim disclosures over 731 days, averaging approximately 2.3 leaks every day.
Akira follows in second place with 1,124 victims.
Both groups maintained continuous operations throughout the entire observation period.
Meanwhile, RansomHub, which dominated activity during 2024 with 801 victims over just 322 days, has remained inactive since April 2025.
Another rapidly growing player is SafePay, which has already accumulated 475 victims since launching in November 2024.
These shifts illustrate how quickly ransomware leadership changes, often outpacing traditional threat intelligence tracking cycles.
Ransomware Brands Die Fast
The study reveals another critical reality.
Ransomware brands experience extremely high mortality rates.
Of 178 groups that recorded at least five victim disclosures, 87 have already become dormant.
Nearly half of all identifiable ransomware brands effectively disappeared within two years.
This rapid turnover creates a serious challenge for defenders.
Organizations frequently focus on tracking headline groups featured in news reports, while emerging operations quietly accumulate victims outside the spotlight.
A defense strategy centered exclusively on famous names may overlook a substantial portion of active ransomware threats.
What Undercode Say:
The most important lesson from this research is not that ransomware groups work weekdays. The real lesson is that ransomware has matured into a fully developed underground economy.
For years, cybersecurity discussions focused heavily on individual threat actors.
The industry created celebrities out of ransomware gangs.
LockBit became a headline.
AlphV became a headline.
RansomHub became a headline.
Yet attackers understood something defenders often ignored.
Brands are temporary.
The business model is permanent.
This dataset exposes a shift from organization-centric thinking toward ecosystem-centric thinking.
The criminal infrastructure survives leadership changes.
Affiliates survive arrests.
Negotiators survive takedowns.
Developers survive disruptions.
Only the logos change.
The rapid emergence of replacement groups demonstrates that ransomware now resembles a decentralized franchise network.
Law enforcement victories remain important.
Disruptions increase operational costs.
Infrastructure seizures create friction.
Arrests remove key individuals.
But none of these actions eliminate the broader market incentives driving ransomware.
The data also reveals something surprisingly human.
Cybercriminals appear to value routine.
They work schedules.
They take breaks.
They slow down during weekends.
They exhibit seasonal behavior.
This predictability creates intelligence opportunities.
Organizations can model attacker activity.
Security teams can optimize staffing.
Threat hunters can prioritize monitoring windows.
Executives can align risk assessments with observed activity.
Another critical insight involves attribution.
The concentration of activity around European time zones reinforces long-standing assessments regarding the geographic distribution of many ransomware operators.
Timing metadata often becomes an overlooked intelligence source.
When combined with infrastructure analysis, language patterns, malware development cycles, and affiliate recruitment activity, temporal analysis can strengthen attribution efforts.
The high mortality rate among ransomware brands further supports a population-based defense model.
Security programs should monitor tactics, techniques, and procedures rather than names.
Attack methods persist longer than group identities.
The ransomware ecosystem increasingly resembles biological evolution.
Groups emerge.
Groups expand.
Groups fragment.
Groups disappear.
Knowledge survives.
The organizations that succeed defensively will be those that track behaviors instead of brands.
Ultimately, the report confirms that ransomware is not chaos.
It is organized crime operating at industrial scale.
Understanding its rhythms may become just as important as understanding its malware.
Deep Analysis
Monitoring Ransomware Activity Through Linux
Monitor suspicious outbound connections netstat -antp
Capture traffic for forensic review
tcpdump -i eth0 -w ransomware.pcap
Search for encrypted file extensions
find / -type f | grep -Ei "locked|encrypted|akira|qilin"
Review recent authentication activity
last -a
Check for privilege escalation attempts
grep "sudo" /var/log/auth.log
Detect persistence mechanisms
systemctl list-unit-files --state=enabled
Inspect running processes
ps aux --sort=-%mem
Identify unusual network listeners
ss -tulnp
Audit file modifications
find /var -mtime -1
Review security events
journalctl -xe
Windows Investigation Commands
Get-Process Get-Service Get-NetTCPConnection
Get-WinEvent -LogName Security
Get-LocalUser Get-ScheduledTask Get-MpThreatDetection net user quser macOS Investigation Commands
lsof -i nettop ps aux log show --last 24h launchctl list system_profiler SPSoftwareDataType
These commands help security teams identify indicators commonly associated with ransomware execution, persistence, privilege escalation, and lateral movement.
✅ The study found ransomware activity heavily concentrated on weekdays. The reported figures show Monday and Tuesday generating the highest disclosure volumes, while Sunday remained significantly lower, supporting the conclusion that many operators follow conventional work schedules.
✅ October consistently appeared as the busiest ransomware month. Data from both 2024 and 2025 demonstrated substantial October spikes, indicating a recurring seasonal pattern rather than a one-time anomaly.
✅ The ransomware ecosystem continues growing despite takedowns. The increase from 38 active brands in May 2024 to 67 active brands in April 2026 supports the argument that ransomware operations are fragmenting and multiplying rather than disappearing.
Prediction
(+1) Ransomware intelligence platforms will increasingly use behavioral timing analysis to forecast attack waves and improve threat detection accuracy.
(+1) Security operations centers will begin adjusting staffing schedules around proven attacker activity windows instead of relying on traditional assumptions about overnight cybercrime.
(+1) More organizations will shift from tracking individual ransomware brands toward monitoring shared tactics, techniques, and affiliate networks.
(-1) The growing number of ransomware groups will make attribution significantly harder, creating confusion for defenders and policymakers.
(-1) Smaller emerging ransomware operations will become more dangerous because they receive less public attention while maintaining access to proven criminal infrastructure.
(-1) Law enforcement takedowns may continue generating short-term disruption but could inadvertently accelerate fragmentation across the ransomware ecosystem, resulting in a larger number of independent threat actors.
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References:
Reported By: securityaffairs.com
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