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<p><span class="citation-930 citation-end-930">The last few decades have seen a significant increase in the operational complexity of cybercrime gangs. </span><span class="citation-929 citation-end-929">This has created something akin to an industry, where each group specializes in a specific part of the attacks: some only breach networks, others focus on malware development, and some deal exclusively in data trading, among other roles.</span></p>
<p><span class="citation-928 citation-end-928">Amidst so many modes of operation, forums on the deep and dark web have become true marketplaces for leaked data, where corporate credentials, personal information, and sensitive assets are traded like commodities. </span><span class="citation-927 citation-end-927">And what starts as a simple leak can quickly escalate into an attack on your infrastructure. </span></p>
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<p><b><span class="citation-926">From Theft to Sale: The Leaked Data Cycle</span></b></p>
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<p>Every leak begins with an extraction. <span class="citation-925 citation-end-925">This can happen through phishing or other social engineering techniques, through malware like <a href="https://cidadaonarede.nic.br/pt/videos/o-que-e-infostealer">infostealers</a>, or even via insiders. </span><span class="citation-924 citation-end-924">Sensitive data is then extracted from organizations and published or sold on closed channels. </span><span class="citation-923 citation-end-923">Platforms like Telegram, forums like the now-defunct BreachForums, and clandestine marketplaces are the main stage for these negotiations.</span></p>
<p><span class="citation-922 citation-end-922">A central role in this cycle is played by Initial Access Brokers (IABs)—operators specialized in breaching companies and selling access to their networks. </span><span class="citation-921 citation-end-921">They have specialized in opening the door and leaving a crack available for the highest bidder, whether they are ransomware groups, <a href="https://en.wikipedia.org/wiki/Advanced_persistent_threat">APTs</a>, or other malicious operations.</span></p>
<p><span class="citation-920 citation-end-920">The connection between leaked data and targeted attacks is not hypothetical—it is an operational reality for cybercriminal groups, manifesting in various ways, such as: </span></p>
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<li><b><span class="citation-919">Credential-Based Ransomware</span></b><span class="citation-919 citation-end-919">: In campaigns like those from <a href="https://www.scworld.com/news/an-identity-defenders-worst-nightmare-initial-access-brokers-and-here-is-why">8Base</a> or <a href="https://www.bleepingcomputer.com/news/security/new-ransomhouse-group-sets-up-extortion-market-adds-first-victims/">RansomHouse</a>, many infections started with VPN or RDP credentials obtained from dark web forums. </span>
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<li><b><span class="citation-918">Business Email Compromise (<a href="https://www.fbi.gov/how-we-can-help-you/scams-and-safety/common-frauds-and-scams/business-email-compromise">BEC</a>)</span></b><span class="citation-918 citation-end-918">: Corporate fraud attacks often start with complete email inbox databases, which reveal internal communications and transaction patterns. </span>
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<li><b><span class="citation-917">Social Engineering and Spear Phishing</span></b><span class="citation-917 citation-end-917">: HR information, organizational charts, and personal data allow for the creation of highly convincing messages, often using specific employee names and internal details to appear more credible. </span>
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<p><span class="citation-916 citation-end-916">Today&#8217;s leaks are not like those of previous years. </span><span class="citation-915 citation-end-915">Criminal groups are automating data exploitation, using generative AI to produce social engineering content at scale, and creating tools to structure and enrich stolen data, facilitating direct integration into attack tools. </span><span class="citation-914 citation-end-914">Furthermore, leaks are being used not only for financial gain but also as instruments of political influence and disinformation.</span></p>
<p>Protecting against the impact of leaked data requires more than just resetting passwords. <span class="citation-913 citation-end-913">It demands strategy, visibility, and readiness. </span><span class="citation-912 citation-end-912">Some recommended actions include: </span></p>
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<li><span class="citation-911 citation-end-911">Mapping and classifying the organization&#8217;s most sensitive data. </span>
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<li><span class="citation-910 citation-end-910">Adopting brand and leak monitoring solutions. </span>
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<li><span class="citation-909 citation-end-909">Having a clear leak response policy that covers not only technical mitigation but also communication with stakeholders. </span>
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<li><span class="citation-908 citation-end-908">Establishing partnerships with companies or consultancies specialized in Cyber Threat Intelligence (CTI) for continuous support. </span>
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<p><b><span class="citation-907">How Resonant Acts to Mitigate Risk</span></b></p>
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<p><span class="citation-906 citation-end-906">Resonant&#8217;s Cyber Threat Intelligence (CTI) area plays a fundamental role in the early detection of leaks and in understanding their potential impact. </span><span class="citation-905 citation-end-905">With automated monitoring techniques and human analysis, our CTI can: </span></p>
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<li><span class="citation-904 citation-end-904">Identify relevant leaks in real-time, correlating data with company assets. </span>
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<li><span class="citation-903 citation-end-903">Associate leaks with known TTPs of active groups, anticipating attack vectors. </span>
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<li><span class="citation-902 citation-end-902">Disseminate actionable alerts to areas such as offensive security, SOC, and GRC. </span>
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<li><span class="citation-901 citation-end-901">Integrate this information into the defense ecosystem, enriching SIEMs, EDRs, and response workflows with additional context. </span>
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<p><span class="citation-900 citation-end-900">This intelligence creates the conditions to react even before an attack materializes. </span><span class="citation-899 citation-end-899">The reality is clear: leaked data isn&#8217;t a distant problem—it&#8217;s the beginning of an increasingly common attack chain. </span><span class="citation-898 citation-end-898">Ignoring its existence is like walking blindfolded through a minefield.</span></p>
<p>Does your organization already monitor leaks in real-time? <span class="citation-897 citation-end-897">Does it correlate data dumps with your digital inventory? </span><span class="citation-896 citation-end-896">If the answer is &#8220;no,&#8221; it might be time to review your strategy.</span></p>
<p><span class="citation-895 citation-end-895">Talk to our team and discover how implementing an intelligence approach centered on leaked data can be the difference between a prevented incident and an irreversible loss.</span></p>


From the Dark Web to Your Endpoint: How Leaked Data Fuels New Threats

Understand how data leaked on the dark web becomes the gateway for cyber attacks and learn how Cyber Threat Intelligence can protect your company.

From the Dark Web to Your Endpoint: How Leaked Data Fuels New Threats

From the Dark Web to Your Endpoint: How Leaked Data Fuels New Threats

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From the Dark Web to Your Endpoint: How Leaked Data Fuels New Threats