Holistic Ransomware Security Approach

Do you have a holistic approach for security against ransomware? To prevent events from escalating, consider immediate containment and expert remediation assistance. Ransomware attacks are rampant, and include hackers locking up computer systems and demanding a payment to unlock them. Ransomware has had devastating effects on our infrastructure and economy, impeded emergency responders, stalled tax payments and forced government offices back to pen-and-paper operations for weeks on end.

80% of those who paid their ransom were attacked again, and not even security firms are immune to these attacks.  

What is Ransomware?

Ransomware is a form of malicious software (malware) that is designed to encrypt files on a device, making the files and the systems that rely on them unusable. Malicious actors then demand a ransom payment, usually in the form of cryptocurrency, in exchange for decryption. These malicious actors may also make extortion demands, by threating to release stolen data if a ransom is not paid, or may come back after the fact and demand an additional payment in order to prevent the release of stolen data.

Recent Breach of a Top Security Firm

Accenture, one of the largest security firms around, confirmed in August 2021 that it was hit by a ransomware attack, with a hacker group using the LockBit ransomware reportedly threatening to release the company’s data and sell insider information.

Previously, the cybersecurity firm FireEye had been the first call for help at government agencies and international companies who had been hacked by sophisticated attackers. Yet on Dec 8, 2020, FireEye announced it had been breached, and not just data but also some of its most valuable tools had been stolen. 

Ransomware Impact

The impact of a successful ransomware deployment includes both technical and non-technical challenges, and can be crippling to business operations. Modern-day attackers have developed advanced techniques that now require a holistic security risk mitigation strategy, inclusive from the board to technical practitioners.

The impact of ransomware can include:

·         Temporary, and possibly permanent, loss of your company's data

·         A complete shutdown of your company's operations

·         Financial loss as a result of revenue-generating operations being shut down

·         Financial loss associated with the cost of remediation efforts

·         Permanent damage to your company's reputation

How Can CyberSecOp Help Your Organization?

Holistic Security Risk Mitigation Strategy

A holistic approach to cybersecurity can address the following components and their implications for governance, organizational structures, and processes.  Our holistic security program includes a risk management program, which provides an accurate overview of the risk landscape and governing principles that ensure accurate risk reporting. We address:

• Assets: Clearly defining critical assets

• Controls: Differentiated controls to balance security with agility

• Processes: State-of-the-art and fully tested procedures for optimal security and remediation

• Organization: Bringing the right skills, most efficient decision making, and effective enterprise-wide cooperation into your organization

• Governance: Investments in operational resilience, prioritized based on deep transparency into cyber risks including third parties and vendors, covering of the whole value chain

• Patches: Keeping your network up to date with the latest software patches

• Software Mitigations: Using robust antivirus and firewall protections in your network

• Backups: Backing up data securely and separately from your network, and routinely testing restoring from backups

Incident Response Services

Scoping and Investigation

The CyberSecOp Incident Response (IR) Team conducts forensic analysis to identify root causes and ensure rapid containment of ongoing attacks. This swiftness to action helps prevent escalation.

Services and Expert Guidance

CyberSecOp IR Team remediates issues throughout the network and implements updates to configurations, architecture, and tooling.

Advanced Threat Analysis

The CyberSecOp Team conducts in-depth investigations including root cause analysis, malware reverse engineering and comprehensive incident reporting.

How Does Ransomware Infect my Network?

Ransomware, like other forms of malware, seeks to take advantage of poor security practices employed by employees and system administrators. According to the Internet Crime Complaint Center (IC3) the most common methods of infection are:

• Email Phishing: This social engineering attack vector occurs when a cyber-criminal sends an email which appears to be legitimate, but in fact contains a link to a malicious website or document with a malicious script, which then infects the recipient’s computer and associated network.

• Remote Desktop Protocol (RDP) Vulnerabilities: RDP is a type of software that allows individuals to control the resources of another computer over the internet. RDP is commonly used by employees working remotely and by system administrators to manage computers from a distance.

• Software Vulnerabilities: These vulnerabilities are flaws in the code of a piece of software (like Microsoft Word) that can be exploited by threat actors to gain control of a system to deploy malware. A common example would be “macros” that get installed within Microsoft Word or Microsoft Excel that lead to infection.

Best Practices and remedial measures

Users and administrators are advised to take the following preventive measures to protect their computer networks from ransomware infection/ attacks:

• Perform regular backups of all critical information to limit the impact of data or system loss and to help expedite the recovery process. Ideally, this data should be kept on a separate device, and backups should be stored offline.

• Check regularly for the integrity of the information stored in the databases.

• Regularly check the contents of backup files of databases for any unauthorized encrypted contents of data records or external elements, (backdoors /malicious scripts.)

• Ensure integrity of the codes /scripts being used in database, authentication and sensitive systems

• Establish a Sender Policy Framework (SPF) for your domain, which is an email validation system designed to prevent spam by detecting email spoofing by which most of the ransomware samples successfully reaches the corporate email boxes.

• Keep the operating system third party applications (MS office, browsers, browser Plugins) up-to-date with the latest patches.

• Application white listing/Strict implementation of Software Restriction Policies (SRP)to block binaries running from %APPDATA% and %TEMP% paths. Ransomware sample drops and executes generally from these locations.

• Maintain updated Antivirus software on all systems

• Don't open attachments in unsolicited e-mails, even if they come from people in your contact list, and never click on a URL contained in an unsolicited e-mail, even if the link seems benign. In cases of genuine URLs close out the e-mail and go to the organization's website directly through browser

• Follow safe practices when browsing the web. Ensure the web browsers are secured enough with appropriate content controls.

• Network segmentation and segregation into security zones - help protect sensitive information and critical services. Separate administrative network from business processes with physical controls and Virtual Local Area Networks.

• Disable ActiveX content in Microsoft Office applications such as Word, Excel, etc.

• Disable remote Desktop Connections, employ least-privileged accounts. Limit users who can log in using Remote Desktop, set an account lockout policy. Ensure proper RDP logging and configuration.

• Restrict access using firewalls and allow only to selected remote endpoints, VPN may also be used with dedicated pool for RDP access

• Use strong authentication protocol, such as Network Level Authentication (NLA) in Windows.

• Additional Security measures that may be considered are

• Use RDP Gateways for better management

• Change the listening port for Remote Desktop

• Tunnel Remote Desktop connections through IPSec or SSH

• Two-factor authentication may also be considered for highly critical systems

• If not required consider disabling, PowerShell / windows script hosting.

• Restrict users' abilities (permissions) to install and run unwanted software applications.

• Enable personal firewalls on workstations.

• Implement strict External Device (USB drive) usage policy.

• Employ data-at-rest and data-in-transit encryption.

• Consider installing Enhanced Mitigation Experience Toolkit, or similar host-level anti-exploitation tools.

• Block the attachments of file types, exe|pif|tmp|url|vb|vbe|scr|reg|cer|pst|cmd|com|bat|dll|dat|hlp|hta|js|wsf

• Carry out vulnerability Assessment and Penetration Testing (VAPT) and information security audit of critical networks/systems, especially database servers from CERT-IN empaneled auditors. Repeat audits at regular intervals.

• Individuals or organizations are not encouraged to pay the ransom, as this does not guarantee files will be released. Report such instances of fraud to CERT-In and Law Enforcement agencies

Our IT & cybersecurity consulting service protects you from cyber criminals in myriad ways. From implementing a cybersecurity program, which include a written information security program and cybersecurity assessment, to purchasing our best-in-class cybersecurity consulting and IT security solutions, engaging with CyberSecOp will lead you in the right direction towards an enhanced security stance. CyberSecOp is an ISO 27001 Certification Organization - join thousands of businesses by putting your security in our hands.