What are Brute Force Attacks?

How Do Brute Force Attacks Work?

Brute force attacks are grounded in trial-and-error tactics, but technology has made them faster and more efficient than ever. This is how they work:

1. Trial-and-Error Method: The attacker keeps trying different combinations until the system grants access.
2. Automated Tools: Sophisticated bots or scripts are often used to accelerate the process, sometimes making millions of attempts per minute.
3. Common Targets: These include login pages, encrypted files, web servers, cloud services, and anything else protected by credentials.

Because of their simplicity, brute force attacks are often the first weapon in a hacker’s toolkit.

Types of Brute Force Attacks

Different variations of brute force attacks exist, each tailored to exploit specific vulnerabilities in a system. Here are the most common types:

1. Simple Brute Force Attack

This is the most basic version where every possible character combination is tried until a match is found. It's typically used when the attacker has no additional information.

2. Dictionary Attack

Here, the attacker uses a pre-arranged list of commonly used passwords. Indian businesses with employees using predictable passwords like “123456” or “admin@123” are particularly vulnerable.

3. Hybrid Attack

A mix of dictionary and brute force, hybrid attacks start with known words and then append numbers or symbols. For instance, trying “India@2024”, “India@2025”, and so on.

4. Credential Stuffing

If user credentials are leaked in a previous breach (like a compromised e-commerce platform), hackers will use the same email-password combinations across multiple platforms.

5. Reverse Brute Force Attack

Here, the attacker starts with a common password (e.g., “welcome123”) and tries it across millions of usernames.

Common Targets of Brute Force Attacks

Even if you think your business is too small to be a target, you're still at risk. Attackers often automate brute force attacks, meaning it’s not the size of your business that matters—it’s the strength of your systems. Weak systems make you vulnerable. Here are some common targets:

1. Web Applications

Login pages on websites are a favourite target, especially WordPress or custom admin dashboards lacking security plugins.

2. Email Accounts

A compromised business email can lead to phishing, data theft, and impersonation scams. This is especially dangerous in procurement, finance, and legal departments.

3. Admin Dashboards

Hackers aim for root access to CMS systems, CRMs, or internal tools where they can inject malware or steal customer data.

4. Remote Desktops and Servers

With more Indian businesses adopting remote work and cloud infrastructure, RDP endpoints have become a goldmine for attackers.

Signs Your System May Be Under Attack

Brute force attacks are often subtle and continuous, making them difficult to detect in real-time. Many businesses only realise they've been compromised after critical data has been accessed or damaged. However, by paying attention to specific patterns and behaviours within your systems, you can identify potential brute force attacks early and take corrective action. Here's how:

1. Multiple Failed Login Attempts: One of the earliest signs of a brute-force attack is a noticeable increase in failed login attempts. Automated bots may attempt thousands of username and password combinations in quick succession. If your system logs show repeated failures, especially across multiple accounts, it's time to investigate further.
2. Sluggish Server Performance: A brute force attack can consume a significant amount of server resources. When bots aggressively try to access your systems, your servers may struggle to handle regular user traffic, resulting in unusually slow response times or crashes. A brute force attempt may be underway if your website or platform suddenly slows down without increasing legitimate user traffic.
3. Frequent Account Lockouts: Many systems are configured to lock accounts after several failed login attempts temporarily. While this is a good cybersecurity measure, it can also be a red flag. If multiple users report being locked out of their accounts for no apparent reason, it may be due to automated password guessing attempts.
4. Suspicious IP Activity: Keep an eye on your server logs. A flood of login requests from unfamiliar or foreign IP addresses is often associated with brute force bots. Some may even use proxy servers to rotate IPs and avoid detection. Geo-fencing or IP blacklisting can help mitigate this risk.

Identifying these signs early can prevent more serious breaches and reduce potential damage.

Consequences of a Successful Brute Force Attack

While brute force attacks may seem basic compared to more sophisticated cyber threats, they can be alarmingly effective, especially against weak or reused credentials. Once an attacker breaks through, the damage can escalate quickly. Here are the consequences:

1. Data Theft

Hackers can extract sensitive business or customer information, including financial records and trade secrets.

2. Account Compromise

If admin accounts are taken over, the attacker gains total control of your systems.

3. Financial Loss

From ransomware to fraud, the cost of recovery can be substantial. According to the Indian Computer Emergency Response Team (CERT-In), the average cost of a data breach in India is over ₹17 crore.

4. System Downtime

Once inside, hackers may cripple your servers, leading to operational disruptions.

5. Reputational Damage

If customer data is leaked, trust is broken. The impact on your brand can last for years.

How to Prevent Brute Force Attacks?

Preventing brute force attacks doesn't always require expensive software. These basic practices can drastically improve your security posture, which include:

1. Strong Password Policies

Encourage employees to use complex, unique passwords. A strong password typically contains at least 12 characters, a mix of uppercase and lowercase letters, numbers, and symbols.

2. Multi-Factor Authentication (MFA)

Adding an extra layer, like OTPs or authentication apps, significantly reduces the chances of a successful attack.

3. Rate Limiting and Account Lockouts

Limit the number of failed login attempts per minute and temporarily block the user or IP after repeated failures.

4. CAPTCHA Implementation

Simple yet effective, CAPTCHAs block bots and make brute force attacks harder to automate.

5. Monitoring and Alert Systems

Use SIEM (Security Information and Event Management) systems to track suspicious activity and trigger alerts for unauthorised login attempts.

How Does Cyber Insurance Add a Layer of Security?

While firewalls, encryption, and MFA are essential, they can't eliminate cyber risks entirely. That's where Cyber Insurance becomes critical, offering financial and legal protection when defences fail. It ensures peace of mind and operational resilience for businesses, especially those vulnerable to brute force attacks.

Cyber insurance covers:

• Damages from downtime, data loss, legal fees, and recovery efforts.
• Breach notification support to comply with CERT-In and data privacy rules.
• Forensic investigation to uncover vulnerabilities and prevent repeat attacks.
• Third-party liability for lawsuits, compensation claims, and fines.

Conclusion

Brute force attacks are not sophisticated but persistent, automated, and shockingly effective when systems aren't well-protected. Indian businesses, especially SMEs and startups, must be proactive. Simple missteps in password hygiene or authentication methods can lead to massive breaches.

From understanding the types of brute force attacks to implementing preventive measures like MFA, rate limiting, and monitoring tools, your responsibility is clear: defend your digital doors before someone kicks them in.

Cyber insurance from Policybazaar for Business acts as your financial shield when prevention fails. But the most vigorous defense always begins with awareness, action, and accountability. So, keep yourself and your employees informed, and if you haven’t already, invest in a comprehensive cyber insurance policy to protect your business today.