--- title: BazarBackdoor Uses Compressed Files To Deliver Malware description: BazarBackdoor Uses Compressed Files To Deliver Malware --- [Securafy Knowledge Hub](https://blog.securafy.com) - [Topics](https://blog.securafy.com/#sf-cover) - [Tools](https://blog.securafy.com/#sf-tools) - [Books & Guides](https://blog.securafy.com/#sf-books) [Talk to Securafy](https://meetings.hubspot.com/securafy/strategy-call) [Topics](https://blog.securafy.com/#sf-cover) [Tools](https://blog.securafy.com/#sf-tools) [Books & Guides](https://blog.securafy.com/#sf-books) [Talk to Securafy](https://meetings.hubspot.com/securafy/strategy-call) [Knowledge Hub](https://blog.securafy.com) / IT Operations IT Operations # BazarBackdoor Uses Compressed Files To Deliver Malware BazarBackdoor Uses Compressed Files To Deliver Malware ![Randy Hall](https://blog.securafy.com/hubfs/Randy%20Hall%202.png) By Randy Hall Updated Jul 2024 2 min read Share [**](https://www.linkedin.com/sharing/share-offsite/?url=https://blog.securafy.com/2021/07/24/bazarbackdoor-uses-compressed-files-to-deliver-malware) [**](https://twitter.com/intent/tweet?url=https://blog.securafy.com/2021/07/24/bazarbackdoor-uses-compressed-files-to-deliver-malware&text=%3Cspan+id%3D%22hs_cos_wrapper_name%22+class%3D%22hs_cos_wrapper+hs_cos_wrapper_meta_field+hs_cos_wrapper_type_text%22+style%3D%22%22+data-hs-cos-general-type%3D%22meta_field%22+data-hs-cos-type%3D%22text%22+%3EBazarBackdoor+Uses+Compressed+Files+To+Deliver+Malware%3C%2Fspan%3E) [**](mailto:?subject=%3Cspan+id%3D%22hs_cos_wrapper_name%22+class%3D%22hs_cos_wrapper+hs_cos_wrapper_meta_field+hs_cos_wrapper_type_text%22+style%3D%22%22+data-hs-cos-general-type%3D%22meta_field%22+data-hs-cos-type%3D%22text%22+%3EBazarBackdoor+Uses+Compressed+Files+To+Deliver+Malware%3C%2Fspan%3E&body=https://blog.securafy.com/2021/07/24/bazarbackdoor-uses-compressed-files-to-deliver-malware) ![](https://static.hsstatic.net/BlogImporterAssetsUI/ex/missing-image.png)Security researchers have spotted a new phishing campaign in the wild that you'll want to make a note of. In this case the hackers are attempting to deliver a malware strain known as BazarBackdoor by using an innovative compression technique and then disguising the malware as an image file. Multi-compression isn't a new technique but it has never been widely used. Although it does seem to be enjoying a surge in popularity lately among the hackers of the world. That is mostly because it's pretty good at 'tricking' email security systems into thinking and flagging malicious attachments as clean. By itself BazarBackdoor isn't harmful but it opens the door and installs a perfectly legitimate toolkit called Cobalt Strike. That then allows the hackers to do pretty much anything they like from moving laterally inside your network, to launching ransomware attacks, copying and exfiltrating files, deleting files, or launching some other type of malware. Even more disturbing is that earlier this year security researchers discovered a variant of BazarBackdoor written in a programming language called Nim which provides at least some evidence that this particular strain is increasing in popularity among hackers around the world. Education is the key just like it always has been. Let your employees know to be on their guard and not to download any attachment (no matter how innocent looking) that comes from an address they do not know and are not familiar with. Even that isn't perfect protection but it's certainly a powerful step in the right direction that will mitigate your risk. Campaigns like this are further evidence that hackers are evolving and their tactics are becoming ever more sophisticated. The challenge in the year ahead and beyond will be to evolve even more quickly than the hackers are. At present it is not clear whether most companies can manage that feat. Tagged Under IT Operations[Cybersecurity](https://blog.securafy.com/tag/cybersecurity)Business Continuity In This Article Need Help With Your Current Setup? Talk through your current systems, risks, and support gaps with Securafy. [Book a Strategy Call](https://meetings.hubspot.com/securafy/strategy-call) ## Join The Conversation Have a question or perspective on this topic? Add it below. ![Randy Hall](https://blog.securafy.com/hubfs/Randy%20Hall%202.png) About The Author Randy Hall · CEO & Founder Randy Hall is the CEO and Founder of Securafy, with decades of experience helping organizations make smarter, safer decisions about technology. A frequent speaker and instructor at national IT events, Randy has advised thousands of organizations, from startups and SMBs to large enterprises and U.S. government entities, on secure, practical technology adoption. He writes about the decisions business leaders are often expected to make without enough context, including cybersecurity, compliance, AI, cyber insurance, IT strategy, and business resilience. Outside the office, you’ll often find Randy on Lake Erie enjoying time on his 38-foot Chris-Craft. **Writes about:** Cybersecurity strategy, compliance, AI security, business resilience, cyber insurance, SMB risk, IT leadership [More From This Author →](https://blog.securafy.com/author/randyhall) Related Articles Business Continuity [Compliance Risk Assessment: How Downtime Impacts Your Bottom Line](https://blog.securafy.com/compliance-risk-assessment-how-downtime-impacts-your-bottom-line) When systems go down, compliance obligations don't pause—and the financial consequences ... Jul 28, 2026 Compliance [HIPAA Security Rule Changes Are Delayed To 2027: Why Healthcare Organizations Should Not Wait](https://blog.securafy.com/hipaa-security-rule-changes-are-delayed-to-2027-why-healthcare-organizations-should-not-wait) The updated HIPAA Security Rule won't take effect until 2027, but healthcare ... Jul 23, 2026 Compliance [Multi Factor Authentication Best Practices for CJIS Security Policy Compliance](https://blog.securafy.com/multi-factor-authentication-best-practices-for-cjis-security-policy-compliance) Law enforcement agencies and criminal justice organizations face mounting pressure to ... Jul 16, 2026 Compliance [CMMC Phase II Has Been Suspended: What Defense Contractors Still Need To Do](https://blog.securafy.com/cmmc-phase-ii-has-been-suspended-what-defense-contractors-still-need-to-do) The Department of Defense suspended CMMC Phase II enforcement, but that doesn't mean ... Jul 15, 2026 IT Operations [Cybersecurity For Veterinary Clinics: Protecting Client Data, Payment Systems, And Practice Operations](https://blog.securafy.com/cybersecurity-for-veterinary-clinics-protecting-client-data-payment-systems-and-practice-operations) Veterinary clinics handle sensitive client data, payment information, and critical ... Jul 9, 2026 IT Operations [AT&T Cybersecurity, AlienVault USM, And Managed Security: What SMBs Still Need To Own](https://blog.securafy.com/att-cybersecurity-alienvault-usm-and-managed-security-what-smbs-still-need-to-own) Managed security platforms like AT&T Cybersecurity and AlienVault USM provide ... Jul 8, 2026 Get Practical Cybersecurity Field Notes Monthly cybersecurity, compliance, and IT strategy updates from Securafy, written for business owners who need clear next steps. - Practical security tips from our Cyber Security Drip series - The Securafy Times, our monthly roundup on compliance and IT strategy - Occasional updates on new tools, guides, and research - No spam — unsubscribe anytime NIST CSF 2.0 Zero Trust Application Control CISA Aligned Enterprise Partner © 2026 Securafy — Columbus & Cleveland, Ohio [Main Site](https://www.securafy.com/) [Blog Home](https://blog.securafy.com/) [Contact](https://www.securafy.com/contact.html) [Privacy Policy](https://www.securafy.com/privacy-policy.html) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Randy Hall", "url" : "https://blog.securafy.com/author/randyhall" }, "dateModified" : "2024-07-24T20:15:26.061Z", "datePublished" : "2021-07-24T15:00:00.000Z", "headline" : "BazarBackdoor Uses Compressed Files To Deliver Malware", "mainEntityOfPage" : { "@id" : "https://blog.securafy.com/2021/07/24/bazarbackdoor-uses-compressed-files-to-deliver-malware", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://blog.securafy.com/hubfs/securafy-logo.png" }, "name" : "Securafy Inc." } } ``` ```json { "@context" : "https://schema.org", "@id" : "https://securafy.com/#organization", "@type" : "Organization", "address" : [ { "@type" : "PostalAddress", "addressLocality" : "Columbus", "addressRegion" : "OH", "postalCode" : "43219", "streetAddress" : "4449 Easton Way, Suite 200" }, { "@type" : "PostalAddress", "addressLocality" : "Independence", "addressRegion" : "OH", "postalCode" : "44131", "streetAddress" : "6100 Oak Tree Blvd, Suite 200" } ], "areaServed" : [ "Columbus OH", "Cleveland OH", "Ohio" ], "name" : "Securafy Inc.", "url" : "https://securafy.com/" } ``` ```json { "@context" : "https://schema.org", "@id" : "https://securafy.com/#website", "@type" : "WebSite", "inLanguage" : "en-US", "name" : "Securafy", "publisher" : { "@id" : "https://securafy.com/#organization" }, "url" : "https://securafy.com/" } ``` ```json { "@context" : "https://schema.org", "@id" : "https://blog.securafy.com/#blog", "@type" : "Blog", "name" : "Securafy Knowledge Hub", "publisher" : { "@id" : "https://securafy.com/#organization" }, "url" : "https://blog.securafy.com" } ``` ```json { "@context" : "https://schema.org", "@id" : "https://blog.securafy.com/2021/07/24/bazarbackdoor-uses-compressed-files-to-deliver-malware#article", "@type" : "Article", "author" : { "@id" : "https://www.securafy.com/about-us/#randyhall", "@type" : "Person", "name" : "Randy Hall" }, "dateModified" : "2024-07-24T20:15:26+00:00", "datePublished" : "2021-07-24T15:00:00+00:00", "description" : "BazarBackdoor Uses Compressed Files To Deliver Malware", "headline" : "BazarBackdoor Uses Compressed Files To Deliver Malware", "image" : "https://www.securafy.com/hs-fs/hubfs/securafy-og-default.jpg", "inLanguage" : "en-US", "isPartOf" : { "@id" : "https://blog.securafy.com/#blog" }, "mainEntityOfPage" : { "@id" : "https://blog.securafy.com/2021/07/24/bazarbackdoor-uses-compressed-files-to-deliver-malware", "@type" : "WebPage" }, "publisher" : { "@id" : "https://securafy.com/#organization" }, "url" : "https://blog.securafy.com/2021/07/24/bazarbackdoor-uses-compressed-files-to-deliver-malware" } ``` ```json { "@context" : "https://schema.org", "@type" : "BreadcrumbList", "itemListElement" : [ { "@type" : "ListItem", "item" : "https://blog.securafy.com", "name" : "Knowledge Hub", "position" : 1 }, { "@type" : "ListItem", "item" : "https://blog.securafy.com/2021/07/24/bazarbackdoor-uses-compressed-files-to-deliver-malware", "name" : "BazarBackdoor Uses Compressed Files To Deliver Malware", "position" : 2 } ] } ```