Threat Intelligence Signals: Human Behavior Is Still the Entry Point
Despite the evolution of defensive technologies, incident investigations and threat intelligence monitoring continue to reinforce a consistent operational reality:
Social engineering remains the most common initial access vector in cyber incidents.
This observation is not theoretical. It is supported by threat intelligence correlations and operational monitoring conducted by security teams worldwide.
Recent monitoring from the DANRESA Cyber Threat Intelligence (CTI) program, based on SOC telemetry and open-source intelligence (OSINT), highlights a convergence of risk patterns observed in early March 2026.
These patterns show that attackers are not simply targeting technical weaknesses.
They are targeting human decision moments inside real operational contexts.
Context Is Now Part of the Attack Surface
Threat intelligence analysis from the DANRESA CTI bulletin for the week of March 2–7, 2026 identified increased activity associated with campaigns exploiting:
• tax-related communications
• credential phishing
• consent-based authorization abuse
• manipulation of user trust
The threat level observed during this period was classified as elevated, largely due to seasonal factors that influence employee behavior.
This pattern reinforces a broader operational insight:
Attackers do not only exploit vulnerabilities in systems.
They exploit predictable behavior in people.
When communications align with expected business activity, the probability of trust increases.
That trust becomes the attacker’s entry point.
Seasonal Campaigns: When Timing Reinforces Credibility
Threat intelligence reports have long documented the relationship between cyber campaigns and seasonal events.
During tax filing periods, organizations naturally exchange:
• financial documentation
• accounting files
• compliance forms
• software related to fiscal reporting
The Brazilian Federal Revenue Service (Receita Federal) itself regularly publishes warnings about scams exploiting tax season.
Threat intelligence research also documents campaigns involving Latin American banking trojans such as Grandoreiro and Mekotio, which frequently leverage fiscal themes to lure victims.
These campaigns often involve:
• phishing emails impersonating government institutions
• malicious PDF attachments
• ZIP archives containing disguised executables
• loaders that deploy banking malware
The technical payload may vary.
The entry point remains the same.
A user receives a message that fits the context of what they are already expecting.
The Evolution of Phishing: Authorization Instead of Password Theft
Another pattern documented in the DANRESA CTI analysis relates to consent phishing.
Research from Microsoft Security has highlighted attacks in which malicious OAuth applications request permission to access corporate data.
Instead of stealing passwords, attackers simply ask users to authorize access.
Once permission is granted, the application may obtain access to:
• email inboxes
• document repositories
• contact directories
Because the access is authorized by the user, traditional containment actions such as password resets or MFA enforcement may not immediately revoke the attacker’s access.
From a technical perspective, this is an identity governance challenge.
From a workforce perspective, it is a decision moment that appears routine but carries security implications.
Legitimate Tools as Attack Infrastructure
Advisories from organizations including CISA, NSA, and MS-ISAC have also highlighted a growing pattern of threat actors abusing legitimate remote administration tools.
Tools such as:
• AnyDesk
• ScreenConnect
• other Remote Monitoring and Management (RMM) platforms
are widely used for legitimate IT support and operational maintenance.
However, after initial access is obtained through phishing or credential compromise, attackers may install these tools to establish persistent access.
Because the software itself is legitimate, detection often relies on behavioral analysis rather than simple signature detection.
This is why modern threat monitoring increasingly focuses on context and activity patterns, not just malware artifacts.
The Operational Lesson
Security technology continues to evolve.
Organizations deploy firewalls, endpoint detection platforms, identity security solutions, and threat intelligence feeds.
These controls are essential.
Yet the majority of attack chains still begin at a much earlier stage:
A message.
A request.
A document.
A permission prompt.
The technical attack often comes later.
The first step is a human decision.
Social engineering succeeds when context aligns with trust and when routine workflows proceed without verification.
Reducing exposure therefore requires reinforcing operational discipline across the workforce.
Verifying unexpected requests.
Confirming administrative actions.
Reviewing application permissions.
Questioning messages that trigger urgency or authority.
Staying Cyber Aware
Cyber resilience is not only about detecting attacks.
It is about reducing the likelihood that the initial entry point succeeds.
Threat intelligence consistently shows that attackers prefer the simplest path into an organization.
And that path is often not technical.
It is behavioral.
Remaining cyber aware means recognizing that the most dangerous messages are not always the ones that look suspicious.
They are often the ones that look perfectly normal.
Daniel Porta
CISO | Cyber Resilience Architect | Enterprise & Workforce Resilience | Founder – Cyber Resilience Initiatives
