With the advancement of e-commerce and the increase in promotional campaigns, Black Friday has established itself as one of the periods most targeted by cybercriminals. LC SEC, a corporate cybersecurity consultancy with operations in Brazil and Europe,, identified a significant growth in attempts of phishing, ad fraud, and payment system intrusions in the weeks preceding the event. To support companies in preventing incidents, the company is launching the Corporate Security Guide for Black Friday, a free material that gathers practical guidance to reduce vulnerabilities and protect sensitive data.
The guide, available in PDF format on the LC SEC, website, presents 10 fundamental corporate security practices, with 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, in addition to 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 take advantage of business opportunities also impacts internal teams. “During Black Friday, it is common for employees and managers to relax basic security controls in the name of agility. Our goal with the guide is to help companies maintain operational performance without opening gaps for 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 suspected fraudulent transactions blocked in Brazil during the 2024 Black Friday increased by 270% compared to the previous year, highlighting the escalation of digital attacks. In the same period, the consultancy 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, the ClearSale Fraud Map recorded, in the first half of 2024 alone, over 1 million attempted scams in online operations, totaling R$ 1.2 billion in potentially lost value.
Beyond financial losses, reputational impact 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 can rise to 48% following a security incident. “Trust is a valuable asset. A single attack can compromise years of brand building and customer relationship,” 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 aimed at creating a solid data protection culture. The Corporate Security Guide for Black Friday has already been adopted by fintechs and partner retailers, and is part of a continuous awareness plan that also includes new editions for Christmas and the start of the fiscal year.
