L - M - P - S

L

LOCAL EXPLOIT

A local exploit is a security vulnerability that allows a user on a Linux system to execute a specific sequence of actions to gain root privileges. An exploit typically occurs due to insufficient validation checks on a user before a privileged application executes a command with root access.

What is a Local Exploit?

Local exploit techniques are used to leverage various components once access to the targeted computer is already established. For example, a local exploit can be utilized on its own after a successful remote attack to elevate privileges, or when access to the target machine has already been established. Such techniques generally allow a standard user to acquire the privileges of a more privileged user (such as a system or root user). In the worst-case scenarios, they provide a way to escalate privileges to the kernel level. Not all exploits are the same; while many allow arbitrary code execution, some only permit files to be read or deleted. For instance, a remote exploit operates over a network and capitalizes on a vulnerability without requiring prior access to the vulnerable system, allowing scripts to be executed from an external machine. In contrast, a local exploit requires prior access to the vulnerable system. The exploit typically involves increasing the privileges of the user account executing the code. Local exploits do not permit unauthorized initial access to a system, since a user account is required beforehand. However, if a weak password policy is enforced or if the system provides user accounts as a service—such as web hosting servers—obtaining initial user access to a system is often feasible.

What Does Local Exploit Mean?

Local exploits typically use memory corruption, poor permission configuration, and logical vulnerabilities. Memory Corruption refers to memory degradation in a local service with elevated privileges. The exploit's ability to exploit such a vulnerability is generally low, depending on the operating system's mitigation protections. Vulnerabilities arising from poor permission configuration occur within local services. They result from the improper application of privileges or access control lists (ACLs) to system objects. From the perspective of local exploit techniques, logical vulnerabilities are the most difficult security flaws to locate. A logical vulnerability is a design flaw that allows a privileged resource to be compromised through entirely legitimate pathways, often mirroring the methods used by antivirus software.

M

MOBILE MALWARE

Mobile malware refers to malicious software specifically designed to target mobile devices such as smartphones and tablets to gain unauthorized access to private data. Although these programs are not as widespread as malware attacking computers, they represent a rapidly growing threat. For enterprises in particular, employees' ability to access corporate networks via personal devices underscores the heightened risk of mobile malware attacks. Understanding the concept of "What is mobile malware?" can significantly enhance your security against cybercriminals.

What Does Mobile Malware Mean?

Cybercriminals use various mobile malware tools to compromise mobile devices. While numerous categories of malicious software exist, mobile malware is generally defined as harmful programs covertly downloaded onto a user's device without their knowledge. The majority of these malicious applications infiltrate devices via third-party application stores or through side-loading. Mobile malware can be utilized to harvest sensitive data, subvert device functionality, demand ransoms, and generate fraudulent network traffic. For instance, ransomware-type malicious software locks down the accessed system and issues a demand for a "ransom". Once the ransom is paid, access codes are provided to unlock the mobile device. Malicious crypto-mining software enables attackers to leverage the processing power of the user's device to execute computations and mint cryptocurrency tokens.

What Are the Methods of Mobile Malware?

One of the most prevalent methods utilized by attackers to distribute malicious mobile malware code is mobile phishing. Phishing is the practice of deceiving users into disclosing account credentials or personal information. While traditional phishing has historically focused on emails, phishing executed via SMS messages (smishing) and messaging applications is increasingly common. A popular technique used to trick victims into installing malicious payloads involves sending SMS messages with links to Android Package (APK) files hosted on attacker-controlled websites. For example, users may receive an SMS link prompting them to visit a fraudulent banking site designed to trick them into "updating their banking application." The downloaded update subsequently installs malicious code, giving the attacker unauthorized access and the capability to harvest credentials. Malicious software on mobile devices can be detected using mobile malware scanning tools. These programs, frequently released by reputable cybersecurity brands, operate similarly to antivirus applications.

P

PENETRATION TEST

A penetration test is a kind of inspection of the digital infrastructure and IT systems of an individual, organization, or enterprise. The primary objective of a penetration test is to identify security vulnerabilities in a given IT system by simulating an attack scenario as a malicious actor would. Consequently, these cyber vulnerabilities can be remediated, preventing potential breaches by ill-intentioned individuals. What, then, is a penetration test?

What Does Penetration Test Mean?

A penetration test is also commonly referred to as an “infiltration test.” Through simulated intrusions into the IT infrastructure and cyber systems, a penetration test determines what sensitive data or level of access can be attained by an attacker. Based on the findings generated by the penetration test, existing security weaknesses that permit unauthorized entry are systematically resolved. Penetration tests are most effectively executed by certified cybersecurity professionals.

What Methods Are Used in Penetration Testing?

There are three main methods to conduct a penetration test, namely, black-box, white-box, and gray-box testing. In a black-box test, the cybersecurity professional is provided with zero prior information regarding the target system, requiring them to attempt an intrusion entirely from the perspective of an external stranger. In a white-box test, the cybersecurity expert is granted full, comprehensive information about the IT infrastructure and uses these insights to conduct the penetration assessment. Gray-box testing is a hybrid approach that combines elements of both methodologies. In this scenario, the cybersecurity specialist is provided with limited clues about the IT infrastructure, but not with full disclosure of every internal detail.

What Are the Types of Penetration Tests?

There are various types of penetration tests depending on purpose. Types of penetration tests can be listed as follows: 

• Web-Based Penetration Testing: Applied to IT systems with internet and accessibility, such as FTP, email, DNS, and web servers.

• Network-Based Penetration Testing: Applied across the local area with IT infrastructure deployed.

• Mobile Penetration Testing: Applied on devices operating mobile operating systems.

• Cloud-Based Penetration Testing: Performed on the cloud-based systems used by an organization or enterprise.

• Source Code Analysis: A type of test performed by analyzing the source code of software applications running on IT systems.

• DDoS Penetration Testing: Applied to evaluate the status of servers and web systems against DDoS attacks.

• Wireless Penetration Testing: Conducted to analyze potential attacks to wireless networks. 

• VOIP Penetration Testing: Implemented to identify security gaps within the VOIP communication systems.

   

PHISHING

Phishing is one of the primary vectors used by cybercriminals to commit data theft. Commonly referred to as classical phishing email methodology, phishing encompasses a variety of specialized variants, including spear phishing, mobile phishing, and Wi-Fi twin. Understanding the question of "What is phishing?" enables you to accurately recognize the manipulation tactics used by attackers and successfully evade online traps.

What Does Phishing Mean?

Phishing is a critical cybersecurity threat and a form of social engineering designed to harvest confidential information across the internet. Phishing scams typically rely on fraudulent web pages with manipulated URLs that mimic the addresses of prominent financial or e-commerce platforms. A phishing email often attempts to create a false sense of urgency with statements such as "Your account has expired" or "Regarding your recent purchase..." In the message body, the attacker prompts users to visit an embedded form that requests personal data, typically financial information. Throughout the fraudulent procedure, the victim operates under the firm belief that they are interacting with the official website of a trusted organization. Phishing emails are frequently accompanied by malicious attachments that appear to be invoices. The message is intentionally crafted to entice the user into opening the file, the execution of which immediately infects the host computer with malware.

What Are the Types of Phishing?

Phishing assaults are designed to match the profile of targeted users. Credential-harvesting attacks use phishing emails with links to fraudulent login portals, such as counterfeit mobile authentication pages for recognized email providers, that instruct users to enter their credentials to reset passwords or resolve alleged account expirations. Malicious web pages leverage subtle alterations in well-known URLs to sow confusion among users. Spear phishing, another favored vector among threat actors, specifically targets high-privilege personnel such as network administrators or corporate account managers. Spear-phishing emails routinely address the user by name and use familiar phrasing to pressure the victim into taking immediate action. A specialized variant known as "CEO fraud" involves communications dispatched from a familiar email identity, such as a chief executive officer, human resources director, or IT support specialist. These communications command the user to execute immediate actions, such as transferring funds, updating employee records, or installing new applications to their computers.

How to Identify Phishing?

For all internet users, particularly those using corporate equipment or accessing sensitive data, the ability to recognize suspicious emails is an essential security measure. The most prevalent indicators that assist in identifying a phishing communication include:

• Unfamiliar conversational tone or greetings • Grammatical inconsistencies and spelling errors • Discrepancies across email sender addresses, hyperlinks, and domain names • Threats or a sense of urgency  • Unusual requests

PHREAKER

Phreak is a slang term for hacking telephone networks and devices. Individuals who execute phreaking attacks are designated as "phreakers." Also recognized as telephone piracy, “phreaking” involves the exploitation of telephone networks and automated menus through telephone theft, specialized prefix codes, and unauthorized connection pathways. For instance, a fraudulent attack may involve gaining unauthorized access to telephony infrastructure to establish clandestine conference calls within network switches. Although phreaking is a legacy technique, its popularity is experiencing a resurgence with the proliferation of Voice over IP (VoIP) networks. Understanding "What is a phreaker?" can help you remain vigilant against the severe security threats posed by telephone pirates.

What Does Phreaker Mean?

The term “phreaker” emerged in the late 1960s to describe individuals seeking to "hack" the public switched telephone network, originating from a portmanteau of the words "freak" and "phone." Professional and highly organized PBX pirates who unlawfully and surreptitiously access telephone systems for their unauthorized use are called phreaks or phreakers. In contemporary usage, this designation has expanded to include anyone who compromises or attempts to breach the security of a telecommunications network. A typical phreaker attempts to identify and manipulate specific audio frequencies associated with the signaling tones used to deliver services to telephone subscribers. During these attacks, attackers may utilize custom-built hardware devices known as "boxes" designed to “deceive” network switches. Various types of boxes, categorized by color codes, are employed for distinct phreaking methodologies; for instance, black boxes enable free calling from residential lines, red boxes target payphones, and blue boxes provide full operational control over telecommunication systems.

What Are Phreaker Threats?

In the current telecommunications landscape, the shift from analog to digital technology has led to phreaking predominantly targeting VoIP systems. Voice Over Internet Protocol, also known as VoIP, is an internet-based technology that facilitates voice communication through an online infrastructure. Phreakers often attack during periods when detection is least likely, such as weekends. These attacks can lead to telephone bills that are 10 to 100 times higher than normal due to unauthorized phone traffic. An experienced phreaker can infiltrate your telephone system, allowing them to listen to phone calls, inject their voices into conversations, and deny access. Typical phreaking incidents, including the disruption of telephone systems, database interference, and unauthorized call occupancy within PBXs, can cause significant damage, particularly for enterprises. 

R

RANSOMWARE

Ransomware is a category of malicious software that blocks a victim's access to their personal computer or system and demands a financial ransom for restoration. In various sources, such malicious applications are also designated as "extortion software." The ransom amount demanded to unlock system access and the psychological rationale compelling the victim to pay vary depending on the malware variant deployed. What, then, is ransomware?

What Does Ransomware Mean?

Ransomware is a malicious program that continues to proliferate and grow more sophisticated as computing environments advance. When this type of software infects a computer, it encrypts a wide array of resident data, such as photographs, gaming save files, documents, and databases, rendering them inaccessible. Once these files are encrypted, normal execution and data retrieval are blocked. The cybercriminals orchestrating the attack demand a ransom in exchange for the private cryptographic key required to decrypt and unlock the files.

Types of Ransomware

Although multiple variations of ransomware exist, employing diverse methodologies to compel computer users into paying ransoms, the most frequently encountered classifications include:

• File-Encrypting Ransomware: Typically deployed via Trojan horses. Once these viruses penetrate a computer system, they systematically locate and encrypt the most frequently used files. Typically, personal media collections, photographs, videos, and professional working documents are targeted. Ultimately, a prominent warning window appears, asserting that the only way to regain access to the encrypted files is to pay a ransom.

• Non-Encrypting Ransomware: Non-encrypting ransomware variants bypass individual file encryption, choosing instead to lock down the entire computer operating system and demand a ransom from the user. Such malicious programs frequently display coercive warning banners masquerading as government agencies. Cybercriminals routinely deploy deceptive notices under the guise of authorities such as the police, CIA, Europol, or the FBI. These messages claim that illegal files have been detected on the device and state that the user must remit the ransom payment to avoid criminal prosecution and imprisonment.

• Browser-Locking Ransomware: Rather than directly compromising the host operating system, this class of malicious software operates via scripts, such as JavaScript, to project a fraudulent warning message within the web browser. These notices frequently reference illicit websites supposedly visited by the user and demand a ransom payment to avert legal action. Naturally, as one might anticipate, the cybercriminals have no affiliation whatsoever with government enforcement agencies.

S

SAFE INTERNET

With the continuously growing number of internet users, the volume of online content is likewise increasing. In this context of abundant information, it may be prudent to restrict access to objectionable material for children and other vulnerable individuals. Utilizing a secure internet service can help establish a virtual network that is devoid of websites that could pose risks or adversely affect your family. This service is particularly advantageous for minors; however, it is important to note that its protective measures are confined to the coverage area of the internet service used and do not extend beyond the home environment.

What is Safe Internet?

Internet service providers offer complimentary safe internet services designed to protect users and their families from harmful online content. This service is available in two profile options: Child and Family. No software installation is necessary; users need only contact their internet service provider's customer service department to begin using it. Upon activation of the safe internet service, users may cancel or modify their profile settings at any time without incurring termination fees or profile change charges. This service is not bound by contracts or commitments, making it an appealing option for individual users who value the restricted internet access it affords. Although publicly available, it is predominantly favored by individual users for its protective benefits.

What Are the Safe Internet Profiles?

The Child Profile restricts access to sites considered inappropriate for children by the Information and Communication Technologies Authority (BTK). Its main features include:

• Academics specializing in pedagogy, sociology, and psychology are consulted during the creation of the profile.

• You cannot access sites where anyone can share content, such as chat and social media platforms.

• Through implemented safeguards, your children are prevented from communicating with strangers.

• You can still access banking, shopping, music, static-content gaming, and the official websites of public and private institutions.

The scope of the Family Profile, another safe internet profile, is also determined by the BTK. Under this profile, access to domain names, sub-domain names, IP addresses, and ports deemed objectionable for your family is blocked. The main characteristics of the family profile are as follows:

• Access to addresses that contain content related to gambling, drugs, obscenity, violence, fraud, and malware is restricted. 

• Access to websites offering products classified as harmful by the Ministry of Health is also prohibited.

• You can access personal sites, forums, and content-sharing platforms.

• By adjusting your profile settings, you can revoke access restrictions for specific gaming, chat, and social media websites.

SPAM

Spam refers to any form of unwanted digital communication transmitted in bulk. While spam is typically delivered via email, it can also be distributed through short messages, telephone calls, or social media platforms. Email providers are highly effective at filtering unwanted mail, but you can report messages should they reach your inbox, typically choosing to block the sender in the same step as reporting the message. Although avoiding unsolicited emails entirely is impossible, knowing "What is spam?" enables you to protect yourself more effectively against associated risks.

What Does Spam Mean?

Spam refers to unwanted commercial messages sent widely across various platforms to many recipients. Malspam, a type of spam, is used to spread malware onto devices. When users click links or open attachments, they risk exposing their systems to malicious software like ransomware, Trojans, bots, info-stealers, crypto-miners, spyware, and keyloggers. These harmful scripts are often hidden in familiar file types such as Word, PDF, or PowerPoint files; opening these files executes the scripts and activates the malware.

Mass communication channels are often used to send spam messages in large quantities. Some spam consists of marketing messages promoting unsolicited products, while other types may spread malicious software, deceive people into revealing personal information, or create fear by inventing crises that demand financial payments. Email spam filters effectively block most of these messages.

What Are the Main Types of Attacks via Spam?

Phishing emails are a common type of spam consisting of unsolicited messages sent by cybercriminals to many targets, aiming to 'trap' a vulnerable few. These emails trick victims into revealing sensitive data like login credentials or credit card information. Although phishing is one of the simplest cyberattacks, it remains one of the most dangerous. Fraudulent emails often imitate or fake communications from legitimate senders. Typical spoofed spam messages request payment for unpaid invoices, ask recipients to reset passwords or verify account details, or ask recipients to confirm unauthorized purchases. In tech support scams, the spam message falsely claims the recipient has a technical issue, prompting them to contact support via a phone number or link. Similar to general email spoofing, these unsolicited messages often impersonate well-known technology companies—such as Microsoft—or reputable cybersecurity organizations.

SPYWARE

Malicious software designed to record the activities of computer users on their systems is known as spyware. Spyware can infiltrate not only personal computers but also virtually any internet-connected device, placing its operations under surveillance. This violation of personal data privacy compromises all user data and facilitates its exploitation for malicious purposes. Web pages visited, saved passwords, keystroke logging, and online shopping transactions are primary targets for spyware applications. What, then, is spyware?

What Does Spyware Mean?

Spyware is a type of malicious software that records activities on any internet-connected device and covertly exploits this data without the owner's knowledge or consent. Developers of spyware may use acquired personal data as leverage for blackmail and extortion, or monetize it by selling it to third-party data aggregators without the user's knowledge. Furthermore, if the harvested data encompasses banking and payment card credentials, those accounts can be utilized fraudulently without the cardholder's knowledge.

How to Detect a Spyware Infection

The majority of spyware applications operate not merely to harvest data, but also to generate revenue by forcing the infected device to display unsolicited advertisements. Consequently, determining whether a device has been compromised by spyware is often feasible. Conversely, to prevent exposure to spyware, users must refrain from clicking on unverified links, downloading unknown files, visiting untrusted websites, and maintain a reliable antivirus utility. If one or more of the following indicators are observed on a device, the system has probably been infected with spyware:

• Continuous appearance of unsolicited pop-up advertisements

• Degradation of device performance or internet connection speed

• Malfunctioning antivirus software accompanied by persistent error alerts

• Sudden emergence of unverified or unfamiliar files within local directories

• Frequent alterations to internet browser settings or default homepage 

What Are the Types of Spyware?

Spyware classifications include the following:

• Keylogger: Keyloggers constitute a category of spyware that tracks and records keystrokes entered on a keyboard, harvesting this data for malicious exploitation.

• Hijacker: Hijackers are spyware variants that commandeer various features and settings of a host device for unauthorized purposes. Distinct hijacker variants exist specifically targeting network modems or web browsers.

• Adware: Adware is a type of spyware that continuously bombards the infected device with unwanted advertisements and initiates unauthorized file downloads.

• Dialers: Dialers represent a category of spyware that dials premium-rate telephone numbers without the user's knowledge, maintaining active connections for extended durations to saddle the victim with exorbitant telephone service charges.

SQL INJECTİON

As more websites are used by almost every enterprise and individual, network attacks have become more common. Among the various ways to attack a website, SQL injection is one of the most common. Understanding "What is SQL injection?" helps you take the right steps to protect your website.

What Does SQL Injection Mean?

SQL is a term used to describe database management systems. SQL injection attacks are techniques that aim to compromise a database by exploiting vulnerabilities in servers or software. Before launching an attack, hackers typically perform reconnaissance to find system weaknesses. For example, if you use open-source content management systems like WordPress or Joomla, attackers can determine your exact software version from open-source code and then target its known vulnerabilities. Additionally, on shared servers, an attack can often succeed through vulnerabilities in other hosting environments on the same server.

What Are the Capabilities of SQL Injection?

• Using SQL injection techniques, an attacker can access your server without permission. By attaching themselves to the database user directory, they can gain unrestricted administrative access to your website.

• Certain information on your website may be designated for authorized personnel only. SQL injection allows attackers to bypass access controls and view restricted pages and sensitive datasets.

• A major consequence of SQL injection is the theft of credit card information. E-commerce sites especially need strict security measures to protect stored payment data and prevent unauthorized access to consumer accounts.

• Attackers who breach your database can modify existing website data to achieve their goals. This tactic is often used by hacktivists or those involved in illegal SEO hacklink sales.

How to Protect Against SQL Injection

• The strongest protection against SQL injection and similar threats relies on implementing strong password security, since attackers often use brute force techniques to guess weak credentials and gain access to websites.

• Ensure your hosting provider has strong security measures. In shared hosting setups, the provider must maintain strict security isolation to avoid cross-account breaches.

• Even with high-quality software, unexpected security flaws can still appear. Since these issues are often fixed through new patches, it is crucial to keep all software and core systems consistently updated.