What are Spooling Attacks, and How to Keep Yourself Safe From Them?


When speaking about cybersecurity assaults, widespread cyber threats, like viruses, malware, phishing, ransomware, and different social engineering assaults, come into our minds. However, with evolving cybersecurity threats, hackers are growing superior cybercriminal actions to breach knowledge and compromise delicate enterprise info. 

One such assault is the Spooling assault, which includes storing or saving knowledge quickly, so it may be processed later. 

Spooling, for the uninitiated, is an acronym for Simultaneous Peripheral Operation On-Line, is a multi-programming cyberattack that features copying and transferring knowledge to different units. 

What are these units? What precisely is the aim of spooling, and how precisely does it work? In this text, we’ll reply all these questions and extra so that you get a transparent image of spooling and what it means. 

What is Spooling? 

Spooling, generally utilized in laptop and networking methods, refers to quickly saving knowledge in bodily or unstable reminiscence, so it may be effectively and simply processed later. 


This means of quickly saving knowledge permits the CPU to stay in an execution mode for an extended interval till it might probably execute the directions transmitted to the community and the info is transferred to different units. 

This course of usually includes implementation on enter/output units, like printers, keyboards, and mice. 

This buffering mechanism of storing knowledge to be executed later makes it simpler for a number of operations to be carried out at a single time—enhancing the system’s efficiency. Simply put, the saved knowledge stays in line for execution till it’s time to run. 

The most typical and real-life instance of spooling is a printer. When you ship a number of recordsdata or paperwork for print, the printer spooler spools the doc, printing every doc one after the other within the right order. 

This spooling mechanism is used for a number of functions, together with conserving observe of duties within the queue that want to be accomplished, storing knowledge to transmit it over the community, or enhancing the efficiency of the methods, permitting a gradual system like a printer to catch up to a a lot sooner system. 

Unfortunately, the cybercrimes companies ought to pay attention to listing is ever increasing as hackers discover newer methods to breach safety, and one in every of them is spooling.

Spooling as a Cybersecurity Threat 

Cybercriminals exploitthe buffering nature of spooling and its skill to enhance the system’s efficiency. 


In a spooling assault, cybercriminals overload the system by sending it with an excessive amount of malicious knowledge, particularly to weak units. Thus, it acts as a Denial of Service (DoS) assault, flooding the system with a whole lot of malicious knowledge, which may be tough to detect due to it showing as a professional visitors circulation. 

Once cybercriminals entry the community or the system knowledge by means of spooling, they’ll modify it, make adjustments, and even inject malicious codes to acquire distant entry to the system or system management. This management permits cybercriminals to conduct cybercriminal actions, like knowledge breaches and sabotage or theft of confidential knowledge. 

Print Spoolers:

One of the key examples and considerations of spooling in cybersecurity is print spoolers, the place hackers exploit printing units by putting in printing drivers. These drivers are normally corrupted and are used to inject malicious codes to acquire entry and management and trigger issues within the laptop system linked to the printer. 

According to a report, the cybersecurity firm Kaspersky discovered that hackers performed over 65,000 cyberattacks through Windows’ Print Spooler application from July 2021 to April 2022. This affected customers worldwide, primarily from nations like Italy, Turkey, and South Korea. 

This reveals the influence of spooling within the cybercriminal world and how tough it will get for directors to even acknowledge whether or not the system is hacked or not. 

Thus, through spooling, hackers can partake in a number of malicious actions in opposition to your methods and community, together with: 

  • Dropping recordsdata remotely utilizing the spooler
  • Installing a malicious printer driver
  • Controlling the spooler to command it to print at a privileged or restricted location 
  • Gaining code execution by means of the spooler recordsdata

Let’s study extra about how a spooling assault works to entry and compromise delicate enterprise knowledge. 

How do these Attacks Work? 

Every cybercriminal assault begins by making an attempt to entry the goal system or community within the image. The identical is the case with spooling assaults. 


Here’s a step-by-step means of how a spooling assault works: 

  • Firstly the attacker identifies the system or system that makes use of spooling to retailer knowledge. These units can embrace a printer, tape driver, or some other enter/output system that makes use of the buffer spooling mechanism. 
  • Next, the attacker can go round destroying the system in two methods. Firstly, he may ship a considerable amount of recordsdata or knowledge to a system utilizing spooling, overwhelming it with a number of and constant requests. This takes up a big chunk of reminiscence of the system, limiting its availability and inflicting it to crash. 
  • Or the attacker may create a malicious file consisting of malicious knowledge or code and ship it to the spool. The file may comprise malware, and its code is executed as soon as it goes by means of or is learn within the spool. 
  • The attacker can both trick a consumer into submitting the file to a spool or ship it instantly maliciously to the goal spool system. 
  • Once the system reads the malicious spool file and executes the code inside, it leads to both malware execution, system crashing, or overwriting of professional knowledge. 
  • Now, relying on the aim of the assault or the attacker, they’ll both acquire unauthorized entry to the system, steal confidential info, exfiltrate knowledge, or trigger injury to the system—utterly disrupting its performance. 

After a profitable spooling assault implementation, it might probably disrupt your system’s operation and knowledge considerably. Let’s find out about just a few extra threats of spooling assaults in your group’s cybersecurity. 


How Company Networks Are Exploited?

Cyberattacks are a serious risk to the group’s cybersecurity as they exploit a system’s or a community’s vulnerabilities, chargeable for working input-output operations like print. 

Cybercriminals exploit the performance of the system’s storing knowledge in a spool, so it may be executed one after the other for malicious functions, akin to: 

  • Lateral motion: Once the attacker exploits the print spooler vulnerability, they simply acquire entry to the system and transfer laterally throughout the community, exploiting and compromising different methods and units. 
  • Ransomware: Cybercriminals can even deploy varied forms of ransomware all through the community after gaining entry to the system through spooling. They could cause vital monetary losses and knowledge disruption by compromising essential encrypted recordsdata and demanding a ransom in alternate for his or her launch. 
  • Data leakage: Hackers use spooling vulnerabilities to compromise delicate enterprise info, akin to its historic monetary data, confidential firm paperwork, private buyer info, and mental property—main to main knowledge losses and reputational firm damages: 
  • Wide assault floor: As the print spoolers are current in a number of forms of methods, together with workstations, printers, and servers, it supplies attackers a large space of assault floor and entry factors to a corporation’s community—making it much more tough for organizations to forestall this assault. 
  • Legacy methods: Outdated software program variations and outdated legacy methods aren’t up to date with the newest safety patches, making them extra weak and vulnerable to spool assaults. 

So, what measures organizations should take to restrict or take away the scope of spooling assaults and keep away from falling sufferer to this malicious cyber risk? Let’s discover out. 

Also learn: Ransomware elimination & checker instruments to rescue your PC.

How to Prevent Spooling Attacks

As we mentioned, spooling assaults are the largest threats to the cybersecurity panorama and companies all all over the world, particularly due to the problem of shortly figuring out or detecting their presence. 

However, you possibly can forestall these assaults utilizing just a few sturdy preventative measures. Let’s learn how.

#1. Use robust passwords

Using robust passwords and implementing robust authentication procedures or password instruments will increase the problem and complexity of accessing firm methods and networks for attackers. 

Hence, utilizing robust, advanced, and lengthy passwords consisting of letters, numbers, and particular characters is essential to make it tough for attackers to guess. At the identical time, it’s additionally essential to replace the passwords repeatedly, both month-to-month or quarterly—lowering the window of alternative for hackers to acquire unauthorized entry through compromised passwords. 


Additionally, implementing sturdy authentication protocols, like multi-factor authentication (MFA), biometrics, face or retinal scans, and so forth., helps additional strengthen the system’s safety—minimizing the danger of spooling and different malicious cyberattacks.

In spooling assaults, attackers typically impersonate professional customers, making an attempt to acquire unauthorized entry to firm methods and units. If they compromise a professional worker’s login credentials, it turns into simpler for them to unfold malware or compromise the system for malicious means. 

#2. Encrypting spooled knowledge

Using encryption algorithms and keys to encrypt the spooled knowledge is one other essential measure to forestall the danger of spooling attackers and keep away from knowledge breaches and losses. 

Employing end-to-end encryption to the spooled knowledge in transit ensures knowledge safety and confidentiality, even when an attacker intercepts it. Thus, safe encryption protocols, like HTTPS, SSL or TLS, VPN, or SSH, will enable you defend and encrypt the delicate spooled knowledge within the system—stopping knowledge exfiltration.

#3. Monitoring spooled knowledge

Implementing logging and monitoring of spooled knowledge performs a vital function in stopping spooling assaults. 

Regular spooled knowledge monitoring helps observe spooling actions and permits real-time detection, evaluation, and response to unauthorized and suspicious actions within the spooling course of. 

With early detection, anomaly detection, sample recognition, and consumer habits evaluation—common spooled knowledge monitoring and establishing real-time alerts assist your organizations observe and reply to spooling dangers and assaults. 

Moreover, monitoring spooled knowledge additionally helps guarantee all of the spooling actions are correctly audited and logged. This is very essential for compliance with inside insurance policies and regulatory necessities. 

#4. Backing up spooled knowledge

While backing up the spooled knowledge doesn’t instantly assist forestall spooling assaults, it supplies a way to recuperate from the assault and reduce its potential influence on the corporate. 

For occasion, backing up spooled knowledge permits simple knowledge restoration, minimizing downtime dangers and avoiding everlasting knowledge loss damages in case of profitable spooling assaults. 

Besides, spooled knowledge backup additionally permits ransomware mitigation, making it simpler to restore the compromised and hacked spooled knowledge—with out the necessity to pay an enormous ransom to the attacker.

#5. Restricting entry to spooled knowledge

Implementing sturdy entry management protocols, like Attribute-based Access Control (ABAC) and Role-based Access Control (RBAC), helps prohibit unauthorized entry and guarantee solely licensed customers or workers can entry the system or submit spool recordsdata to the system. 

It’s essential to implement the least privilege precept to grant customers entry to solely these mandatory methods and sources they require to full their duties.

#6. Keeping spooled knowledge up to date

Keeping the spooled knowledge up to date helps handle a number of knowledge safety vulnerabilities and cut back the influence of spooling assaults. 

Regular patch administration and conserving the system up-to-date with the newest safety patches reduce the assault floor for spooling assaults. Similarly, conserving the spooled knowledge up-to-date additionally helps repair bugs and guarantee excessive knowledge integrity.


#7. Using a firewall

Firewalls and anti-virus software program act as a barrier between your inside and exterior community, monitoring and blocking malicious visitors and recordsdata to your spool methods. 

You can use a firewall to block malicious visitors from suspicious, unknown, and unauthorized sources to your spool methods, permitting solely licensed visitors and lowering the dangers of spooling assaults. 

At the identical time, conserving your firewalls up-to-date and configured with the newest safety updates is essential to make sure the utmost safety of your organization networks and methods.

#8. Using Intrusion Detection Systems

An Intrusion Detection System (IDS) is a software program utility or a tool that screens a system or a community for malicious actions or authorized coverage violations. 

Thus, by actively monitoring spooling methods’ visitors and actions, Intrusion Detection Systems allow early detection, insights, and alerts for indicators of spooling assaults—enabling organizations to mitigate and reply to them shortly and successfully. 

They leverage anomaly and signature-based detection to set a baseline for regular spooling sample habits and set off alerts in case of sample deviation and suspicion.

#9. Using Intrusion Prevention Systems

An Intrusion Prevention System (IPS) is likely one of the most crucial parts of the community safety technique. It constantly screens the community visitors in actual time and takes motion if it detects any malicious visitors or exercise. 

While Intrusion Detection Systems solely detect and alert about suspicious habits, IPS additionally takes fast, quick actions in opposition to these actions to forestall them from inflicting any hurt to the methods—effectively and shortly addressing assaults like spooling assaults. 

They use automated responses to routinely reply to the spooling assaults they detect by mitigating or blocking suspicious actions they detect. Besides, additionally they leverage visitors inspection, content material inspection, request price limiting, geo-blocking, protocol enforcement, and extra to allow early detection and prevention of spooling assault dangers.

#10. Be cautious about what you click on on

Often, spooling assaults are initiated with malicious hyperlinks and phishing emails. Even the recordsdata or attachments the attacker sends into the spool comprise malicious hyperlinks, which, when clicked, can lead you to faux web sites or set off malicious software program downloads. 

Hence, it’s essential to keep cautious of the place you click on to forestall the danger of spooling assaults.


#11. Educate your workers about spooling assaults

Educating your workers concerning the potential dangers of spooling is likely one of the most vital preventative measures to keep away from spooling assaults. 

It’s essential to be certain that your group’s workers is nicely conscious of the newest cyberattacks and the threats concerned with spooling. Hence, they’re higher geared up with the information to mitigate them. 

You can even conduct cybersecurity coaching to unfold spooling assault consciousness and practice workers to establish spooling dangers, indicators of suspicious emails, attachments, and hyperlinks, and methods to report or mitigate these dangers to curb their influence on the group’s methods and networks.

Be Safe!

Staying vigilant concerning the newest and evolving cybersecurity threats is essential for companies and organizations to keep away from falling sufferer to malicious assaults and shedding delicate knowledge and enterprise info. 

Cyberattackers exploit the spooling mechanism by sending malicious visitors or recordsdata to the spooling networks and methods to acquire unauthorized entry and compromise confidential knowledge. 

Gaining entry to delicate spooled knowledge permits cybercriminals to compromise it in a number of methods and additionally implement different types of cyber attackers, like ransomware, malware, or phishing assaults. 

We hope this text helps you acquire perception into what spooling is, how spooling assaults work, and how one can forestall and mitigate it to keep away from knowledge breaches and dangers talked about above and guarantee a strong community safety posture in your group.

Next up, the very best cybersecurity compliance software program to keep safe.



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