Inside social engineering attacks: Tactics, psychology, and why customers keep falling for them

Despite record investments in cybersecurity, banks and credit unions worldwide continue to face a rising tide of social engineering attacks. Criminals are sidestepping robust technical controls—not by hacking systems, but by hacking people’s psyches. The cost is staggering: social engineering-driven fraud,including phishing, vishing, and authorized push payment (APP) scams, surged by 56% year-on-year, even as traditional payment fraud declined. This clearly highlights the human element as the new frontline of risk .

Understanding the real-world tactics behind these attacks—and the psychology that makes them work—is essential for financial institutions striving to protect customers, defend trust, and strengthen the digital banking experience.

Social engineering attacks succeed not due to technological sophistication, but by exploiting deep-seated, universal human tendencies. Attackers manipulate emotions and instincts in the heat of the moment, often overwhelming the rational, cautious part of the brain—especially during unfamiliar or stressful digital interactions.

The top psychological triggers used in social engineering scam

Fraudsters systematically exploit these triggers, often in combinations, tricking customers into taking actions they’re unsure of .

Modern social engineering doesn’t just rely on a single channel or scam. Increasingly, fraudsters use omni-channel approaches that layer multiple trusted signals:

• SMS and phone call (vishing): The victim gets an “urgent fraud alert” SMS, immediately followed by a call from a spoofed number, claiming to be the bank. The fraudster walks them through “verification” that extracts credentials and codes.
• Email and fake website: Hyper-realistic emails sent from compromised or lookalike domains with links to phishing sites capturing logins and OTPs.
• Social media and messaging apps: Personalized contact via LinkedIn, WhatsApp, or Facebook Messenger based on open-source intelligence grabs, used for rapporting and delivering malicious links.
• Spoofed caller IDs: Attackers routinely impersonate bank lines or known numbers to bypass suspicion.
• Deepfake audio: Increasing use of AI-generated voices to impersonate executives or “trusted staff,” pressuring staff to release information or customers to validate transactions.

Banks must recognize that fraudsters now orchestrate cross-platform, cross-device deception — merging signals to erode skepticism.

1. Vishing and OTP relay

How it happens:

• Customer receives a call from “bank security” (caller ID is spoofed). The caller claims there is suspicious activity and a need to “verify your identity.”
• While the victim listens, a real OTP is triggered, as the attacker is attempting a real login.
• The caller urgently requests the code “to secure your account.”
• The victim shares the OTP; attacker relays it instantly, bypassing two-factor authentication.

Result: Account takeover is completed, funds are moved, and the customer is left with drained accounts, believing they assisted legitimate security staff.

2. Authorized push payment (APP) scam

How it happens:

• The customer gets a call or email purportedly from the “fraud prevention team,” stating their account is under immediate threat.
• A sense of urgency and authority is established.
• The fraudster directs them to “move funds for safety” to a new account—often walking through the payment step-by-step and staying on the call to ensure compliance.
• The bank account “under attack” is, in reality, the victim’s own. The “safe account” is controlled by the fraudster.

Impact: Genuine, irreversible payment is made. Since the customer “authorized” the transfer, the risk of recovery is near-zero, unless the bank’s controls trigger intervention.

3. Small-business invoice/BEC fraud

How it happens:

• Attackers compromise or spoof a supplier or vendor’s email.
• Over weeks, they monitor payment cycles. At the right moment, such as prior to a contract renewal or monthly invoice, a “new banking details” email is sent to accounts payable from what looks like the trusted partner.
• The supplier’s voice, branding, and style are closely mimicked.

The business pays the invoice—often thousands of dollars—to the fraudster’s account. Impact: In 2024, business email compromise accounted for over $62.3 billion in losses globally.

Financial institutions have invested heavily in awareness campaigns and customer education. Yet, the sophistication, speed, and emotional pressure of these attacks often override rational decision-making—even among digital natives.

Reasons awareness alone fails:

• Cognitive overload: Customers are bombarded by legitimate and fraudulent alerts, leading to alert fatigue and reduced ability to distinguish threats.
• Emotional manipulation: Urgency, fear, and authority triggers are amplified in the moment, narrowing attention to the scammer’s narrative.
• Procedural mimicry: Scams now mimic genuine bank workflow and terminology—often making fakes indistinguishable from real requests.
• Victim blaming and shaming: Many customers do not report incidents, increasing under-reporting and recycling of attack vectors.

While education is necessary, lasting improvement comes from structural design changes in fraud prevention mechanisms.

Many industry leaders recommend moving beyond legacy static authentication (passwords and SMS OTPs) to context-aware, risk-based authentication:

Key defensive signals:

• Behavioral analytics: analyzing user behavior and activity patterns to flag · anything suspicious Device intelligence: Recognizing trusted and new devices; inspecting for SIM-swaps or jailbreaking before allowing critical actions.
• Geolocation and network patterns: Validating if requests come from suspicious regions or unexpectedly change device fingerprints mid-session.
• Session anomaly detection: Spotting signs of “guided” behavior, such as rapid stepwise completion, pasted data, or phone-in-ear during sensitive steps.

With these proactive measures, banks can catch even “willing” victims—those actively helping the fraudster—through deviations in context and routine.

Social engineering attacks in banking are not going away—they are becoming more persuasive, varied, and technologically advanced. The psychology of social engineering guarantees a high rate of customer error, but smart, context-aware defenses can make the difference between a near-miss and an irrecoverable loss.

Entersekt stands with institutions rethinking digital authentication, risk analytics, and customer journey design, leveraging behavior, device, and transaction intelligence to spot and stop social engineering scams before they bite.

Learn more about protecting your customers with Entersekt’s advanced banking and payment fraud prevention.