With the growth of e-commerce and the increase in promotional campaigns, Black Friday has become one of the most targeted periods for cybercriminals. LC SEC, a consulting firm specializing in corporate cybersecurity with operations in Brazil and Europe phishing attempts , ad fraud, and payment system intrusions in the weeks leading up to the event. To support companies in preventing incidents, the company is launching the Corporate Security Guide for Black Friday, a free resource that brings together practical guidelines to reduce vulnerabilities and protect sensitive data.
The guide, available in PDF format on the LC SEC , presents 10 fundamental corporate security practices, using accessible language applicable to companies of any size. The content covers topics such as employee awareness and training, multi-factor authentication, secure password policies, backups , incident monitoring and response, as well as recommendations aligned with international standards such as ISO 27001, SOC 2, and LGPD.
According to Luiz Cláudio, CEO and founder of LC SEC , the rush to seize commercial opportunities also impacts internal teams. “During Black Friday, it’s common for employees and managers to relax basic security controls in the name of speed. Our goal with this guide is to help companies maintain operational performance without creating vulnerabilities to attacks,” explains the executive, a specialist in compliance and international cybersecurity standards such as ISO 27001, PCI DSS, and NIST.
The warning is justified. According to Visa data, the number of transactions suspected of fraud blocked in Brazil during Black Friday 2024 increased by 270% compared to the previous year, highlighting the escalation of digital attacks. During the same period, the consulting firm Redbelt Security detected 1,296 fake websites with Black Friday offers created in just three weeks before the event, with 533 appearing in the last five days of the research. Meanwhile, ClearSale's Fraud Map recorded, in the first half of 2024 alone, more than 1 million attempted scams in online transactions, totaling R$ 1.2 billion in potentially lost value.
Beyond financial losses, reputational damage is another risk for brands. A PwC study revealed that 47% of consumers would stop buying from a company after a negative experience, and market research indicates that this percentage could rise to 48% after a security incident. “Trust is a valuable asset. A single attack can compromise years of brand building and customer relationships,” emphasizes Luiz Cláudio .
With over a decade of experience in cybersecurity, LC SEC has been expanding its digital education programs, which include thematic guides and corporate training focused on creating a solid data protection culture. The Corporate Security Guide for Black Friday has already been adopted by fintechs and retailers, and is part of an ongoing awareness plan that also includes new editions for Christmas and the start of the fiscal year.
