Data Exfiltration: defense against data theft
A common definition of data exfiltration is the theft, removal, or unauthorized movement of any data from a device. Data exfiltration typically involves a cybercriminal stealing data from personal or corporate devices, such as computers and cell phones, through various cyberattack methods.
Failure to control information security can lead to data loss which can cause financial and reputational damage to an organization.
How does a data exfiltration happen?
Data exfiltration occurs in two ways, through attacks from outsiders and through threats from within. Both are major risks, and organizations need to ensure their data is protected by detecting and preventing data exfiltration at all times.
An attack from outside the organization occurs when an individual infiltrates a network to steal corporate data or user credentials. This is typically the result of a cybercriminal injecting malware into a device connected to a corporate network.
Some malware strands are designed to spread across an organization’s network and infiltrate others, seeking sensitive data in an attempt to extract. Other types of malware remain dormant on a network to avoid being detected by organizations’ security systems until data is subversively extracted or information is gradually collected over a period of time.
Attacks can result from malicious insiders stealing your organization’s data and sending documents to your personal email address. Typically the data is then sold to cyber criminals. They can also be caused by inattentive employee behavior that sees corporate data fall into the hands of bad actors.
Types of Data Exfiltration
Data exfiltration occurs in various ways and through multiple attack methods, mostly on the Internet or on a corporate network.
The techniques cybercriminals use to extract data from organizations’ networks and systems are becoming increasingly sophisticated. These include: anonymous connections to servers, Domain Name System (DNS) attacks, Hypertext Transfer Protocol (HTTP) tunneling, Direct Internet Protocol (IP) addresses, fileless attacks, and remote code execution.
Let’s see in detail some attack techniques to know what we are talking about specifically.
1. Social engineering and phishing attacks
Social engineering attacks and phishing attacks are popular network attack vectors. They are used to trick victims into downloading malware and entering their account credentials.
Phishing attacks consist of emails designed to appear legitimate and often appear to come from trusted senders. They usually contain an attachment that injects malware into the device. Other types contain a link to a website that appears legitimate but is forged to steal the login credentials entered. Some attackers even launch targeted phishing attacks to steal data from a specific user. Often the targets are the executives of a company or known individuals.
To defend against these types of attacks, it’s best to recognize them immediately and trash the emails. In a company it is possible to help the process through an ad hoc training course, based on data collected internally by the company through a controlled test. SOD also offers this service, if you are interested, you will find more information on the page of the service itself.
2. Outgoing email
Cybercriminals check e-mails to retrieve any data coming out of organizations’ e-mail systems. The recovered data can be calendars, databases, images and planning documents. These provide sensitive information of value or information that is useful for recovering valuable data.
3. Download to unsafe devices
This method of data exfiltration is a common form of accidental insider threat. The attacker accesses sensitive corporate information on his trusted device, then transfers the data to an insecure device. The insecure device could be an external drive or smartphone that is not protected by corporate security solutions or policies, which puts it at risk of data exfiltration.
Smartphones are also susceptible to data exfiltration. Android devices are vulnerable to the installation of malware that take control of the phone to download applications without the user’s consent.
4. Upload to external devices
This type of data exfiltration typically comes from bad guys. The internal attacker can extract data by downloading the information from a secure device, then uploading it to an external (insecure) device. This external device could be a laptop, smartphone, tablet or USB stick.
5. Human error and unsafe behavior on the network
The cloud provides users and businesses with a multitude of benefits, but together there are significant risks of data exfiltration. For example, when an authorized user accesses cloud services in an insecure way, it allows an attacker an access route from which he can retrieve data and take it off the secure network. Human error also plays a role in data mining, because appropriate protection may no longer be in place.
How to spot a data exfiltration attack
Depending on the type of attack method used, detecting data exfiltration can be a difficult task. Cybercriminals using more difficult-to-detect techniques can be mistaken for normal network traffic. This means that they can lurk in networks unnoticed for months and even years. Data exfiltration is often only discovered when the damage has already been caused.
To detect the presence of at-risk users, organizations must use tools that automatically discover malicious or unusual traffic in real time.
One tool with this capability is SOC (also offered as a service: SOCaaS) which implements an intrusion monitoring system, as well as an automatic system that verifies user behavior. When the SOC detects a possible threat, it sends an alert to the organization’s IT and security teams who can take action and investigate the situation.
SOC works by searching for and detecting anomalies that deviate from regular network activity. They then issue an alert or report so administrators and security teams can review the case.
In addition to detecting automatic threats, organizations can also construct the entire sequence of an event as it occurred, including mapping to a known kill chain or attack framework.
Using a SOCaaS, for a company that manages sensitive data, is an advantage from many points of view. Being offered as a service, the company will not have to invest in setting up a specialized IT department for its SOC, will not have to hire additional personnel and will be able to count on security systems that are always updated with qualified and always available operators.
For more information, do not hesitate to contact us.
- Zero-Day attack: what they are and how to defend yourself with SOCaaS
- Monitoring system, an overview
- Data Exfiltration: defense against data theft
- Install a Let’s Encrypt certificate on Debian based machine
- WastedLocker: Next generation ransomware
- Protecting a site in WordPress: security package
- Critical ransomware: examples of successful attacks
- Secure Online Desktop Social Initiatives
- Backup as a Service (2)
- Cloud Conference (3)
- Cloud CRM (1)
- Cloud Server/VPS (20)
- Conferenza Cloud (4)
- ICT Monitoring (4)
- Log Management (2)
- News (16)
- ownCloud (4)
- Privacy (6)
- Secure Online Desktop (14)
- Security (6)
- Web Hosting (12)
- NSA Appoint Rob Joyce as Cyber Director January 15, 2021Joyce has long worked in US cybersecurity leadership, most recently serving as the NSA's top representative in the UK.
- Successful Malware Incidents Rise as Attackers Shift Tactics January 15, 2021As employees moved to working from home and on mobile devices, attackers followed them and focused on weekend attacks, a security firm says.
- How to Achieve Collaboration Tool Compliance January 15, 2021Organizations must fully understand the regulatory guidance on collaboration security and privacy so they can continue to implement and expand their use of tools such as Zoom and Teams.
- Name That Toon: Before I Go ... January 15, 2021Feeling creative? Submit your caption in the comments, and our panel of experts will reward the winner with a $25 Amazon gift card.
- These Kids Are All Right January 15, 2021
- Shifting Privacy Landscape, Disruptive Technologies Will Test Businesses January 14, 2021A new machine learning tool aims to mine privacy policies on behalf of users.
- 'Chimera' Threat Group Abuses Microsoft & Google Cloud Services January 14, 2021Researchers detail a new threat group targeting cloud services to achieve goals aligning with Chinese interests.
- Businesses Struggle with Cloud Availability as Attackers Take Aim January 14, 2021Researchers find organizations struggle with availability for cloud applications as government officials warn of cloud-focused cyberattacks.
- NSA Recommends Using Only 'Designated' DNS Resolvers January 14, 2021Agency provides guidelines on securely deploying DNS over HTTPS, aka DoH.
- Who Is Responsible for Protecting Physical Security Systems From Cyberattacks? January 14, 2021It's a question that continues to engage debate, as the majority of new physical security devices being installed are now connected to a network. While this offers myriad benefits, it also raises the question: Who is responsible for their cybersecurity?
- SEC Consult SA-20210113-1 :: Multiple vulnerabilities in flatCore CMS January 13, 2021Posted by SEC Consult Vulnerability Lab on Jan 13SEC Consult Vulnerability Lab Security Advisory < 20210113-1 > ======================================================================= title: Multiple Vulnerabilities product: flatCore CMS vulnerable version: < 2.0.0 Build 139 fixed version: Release 2.0.0 Build 139 CVE number: CVE-2021-23835, CVE-2021-23836, CVE-2021-23837, CVE-2021-23838 impact: High homepage:...
- SEC Consult SA-20210113-0 :: Multiple vulnerabilities in Pepperl+Fuchs IO-Link Master Series January 13, 2021Posted by SEC Consult Vulnerability Lab on Jan 13SEC Consult Vulnerability Lab Security Advisory < 20210113-0 > ======================================================================= title: Multiple vulnerabilities product: Pepperl+Fuchs IO-Link Master Series See "Vulnerable / tested versions" vulnerable version: System 1.36 / Application 1.5.28 fixed version: System 1.52 / Application 1.6.11 CVE number:...
- Backdoor.Win32.Zombam.a / Remote Stack Buffer Overflow January 13, 2021Posted by malvuln on Jan 12Discovery / credits: malvuln - Malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/6c5081e9b65a52963b0b1ae612ef7eb4.txt Contact: malvuln13 () gmail com Media: twitter.com/malvuln Threat: Backdoor.Win32.Zombam.a Vulnerability: Remote Stack Buffer Overflow Description: The malware listens on TCP port 80, sending an HTTP GET request with 300 or more bytes will trigger buffer overflow overwriting EIP. Type: […]
- Backdoor.Win32.Levelone.b / Remote Stack Buffer Overflow January 13, 2021Posted by malvuln on Jan 12Discovery / credits: malvuln - Malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/3f82e6ddc9f5242f5af200d2fbae4ce4.txt Contact: malvuln13 () gmail com Media: twitter.com/malvuln Threat: Backdoor.Win32.Levelone.b Vulnerability: Remote Stack Buffer Overflow Description: The backdoor listens on Port 7777, sending two large consecutive HTTP OPTIONS requests trigger the buffer overflow overwriting EIP. Type: PE32 MD5:...
- Backdoor.Win32.Levelone.a / Remote Stack Buffer Overflow January 13, 2021Posted by malvuln on Jan 12Discovery / credits: malvuln - Malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/6a2d09c4527cf222e4e2571b074fcc0c.txt Contact: malvuln13 () gmail com Media: twitter.com/malvuln Threat: Backdoor.Win32.Levelone.a Vulnerability: Remote Stack Buffer Overflow Description: The malware listens on Port 1500, sending a specially crafted HTTP TRACE request causes a buffer overflow and overwrites EIP with our payload. If […]
- Backdoor.Win32.Ketch.b / Remote Stack Buffer Overflow January 13, 2021Posted by malvuln on Jan 12Discovery / credits: malvuln - Malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/9d7be3799594a82bf7056905f501af03.txt Contact: malvuln13 () gmail com Media: twitter.com/malvuln Threat: Backdoor.Win32.Ketch.b Vulnerability: Remote Stack Buffer Overflow Description: Makes HTTP GET request for a file "script.dat", and writes the server response to temporary file named "watchb.tmp" under c:\Windows dir. At 1032...
- Re: Backdoor.Win32.Xtreme.yvp / Insecure Permissions EoP January 13, 2021Posted by bo0od on Jan 12When you say backdoor, you mean backdoor which microsoft remotely using it or you mean a malware can take advantage of? malvuln:
- Advisory: ES2021-01 - Loopback access control bypass in coturn by using 0.0.0.0, [::1] or [::] as the peer address January 13, 2021Posted by Sandro Gauci on Jan 12# Loopback access control bypass in coturn by using 0.0.0.0, [::1] or [::] as the peer address - Fixed version: 4.5.2 - Enable Security Advisory: https://github.com/EnableSecurity/advisories/tree/master/ES2021-01-coturn-access-control-bypass - Coturn Security Advisory: https://github.com/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7p - Other references: - CVE-2020-26262 -...
- Re: Trovent Security Advisory 2010-01 [updated] / CVE-2020-28208: Rocket.Chat email address enumeration vulnerability January 13, 2021Posted by Stefan Pietsch on Jan 12# Trovent Security Advisory 2010-01 # ##################################### Email address enumeration in reset password ########################################### Overview ######## Advisory ID: TRSA-2010-01 Advisory version: 1.1 Advisory status: Public Advisory URL: https://trovent.io/security-advisory-2010-01 Affected product: Web application Rocket.Chat Affected version:
- Envira Gallery - Lite Edition - Version 220.127.116.11 CVE-2020-35581 CVE-2020-35582 January 13, 2021Posted by Rodolfo Augusto do Nascimento Tavares on Jan 12==== [Tempest Security Intelligence - ADV-12/2020] ============================= Envira Gallery - Lite Edition - Version 18.104.22.168 Author: Rodolfo Tavares Tempest Security Intelligence - Recife, Pernambuco - Brazil ===== [Table of Contents] ================================================ • Overview • Detailed description • Disclosure timeline • Acknowledgements • References ===== [Vulnerability Information]...
Tempo di lettura: 4 minLa pratica dello shadow IT e' l'utilizzo di sistemi informatici, dispositivi, software, appl… https://t.co/9wQPtvqemG
The practice of shadow IT is the use of computer systems, devices, software, applications and services without the… https://t.co/CgzjblglX9
Acronis Active Protection e' una tecnologia anti-ransomware avanzata. Protegge attivamente tutti i dati dei vostri… https://t.co/Hw7Rs2YOQa
Le insider threat sono difficili da individuare perche' provengono, appunto, dall'interno della vostra organizzazio… https://t.co/aborWoeBgK
Se il sito e' lento, stai perdendo clienti. E' molto semplice e non ci sono modi piu' gentili per dire la stessa co… https://t.co/yB18k0UH49