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Security
Malware Analysis
Analyzing SCR file
Message
<blockquote data-quote="struppigel" data-source="post: 1054799" data-attributes="member: 86910"><p>levelcomputer.exe is a cabinet file. After unpacking it with 7zip you will get 2 files ca 90 MB each, one is the 32 bit and the other the 64 bit variant of a similar .NET assembly.</p><p></p><p>64 bit: <a href="https://www.virustotal.com/gui/file/9c901e9994b0ae477c4d202fd004c84977281602f50a98f80f4480389f195c6a" target="_blank">VirusTotal</a></p><p>32 bit: <a href="https://www.virustotal.com/gui/file/3c92c0a47becd2efa579fb3eaa06dd711a55f4a2cdb9a0311492da2205b1e446" target="_blank">VirusTotal</a></p><p></p><p>I continued mainly with the 32 bit version. It downloads encrypted data from this URL and decodes it: <a href="https://www.virustotal.com/gui/url/d7f55052221aa616f7d7a480f61124ac70fbb571cbb5167caabba248d8c690dc" target="_blank">VirusTotal</a></p><p></p><p>[ATTACH=full]278123[/ATTACH]</p><p></p><p>It performs process injection by running itself as a child process and injecting the payload there. I unpacked the payload and uploaded it here: <a href="https://www.virustotal.com/gui/file/3472a64c600c322e859c70e342018aaf2a1f9b454ecf13eb46b2c2ac2fee27bc?nocache=1" target="_blank">VirusTotal</a></p><p></p><p>It is indeed LummaStealer. One of our analysts already worked on that malware family, hence we have a proper detection name here. It also sets the user agent TeslaBrowser/5.5 for its requests which is mentioned in this <a href="https://medium.com/s2wblog/lumma-stealer-targets-youtubers-via-spear-phishing-email-ade740d486f7" target="_blank">article about LummaStealer</a></p><p></p><p></p><p>[ATTACH=full]278122[/ATTACH]</p></blockquote><p></p>
[QUOTE="struppigel, post: 1054799, member: 86910"] levelcomputer.exe is a cabinet file. After unpacking it with 7zip you will get 2 files ca 90 MB each, one is the 32 bit and the other the 64 bit variant of a similar .NET assembly. 64 bit: [URL='https://www.virustotal.com/gui/file/9c901e9994b0ae477c4d202fd004c84977281602f50a98f80f4480389f195c6a']VirusTotal[/URL] 32 bit: [URL='https://www.virustotal.com/gui/file/3c92c0a47becd2efa579fb3eaa06dd711a55f4a2cdb9a0311492da2205b1e446']VirusTotal[/URL] I continued mainly with the 32 bit version. It downloads encrypted data from this URL and decodes it: [URL='https://www.virustotal.com/gui/url/d7f55052221aa616f7d7a480f61124ac70fbb571cbb5167caabba248d8c690dc']VirusTotal[/URL] [ATTACH type="full" alt="nextdownload.png"]278123[/ATTACH] It performs process injection by running itself as a child process and injecting the payload there. I unpacked the payload and uploaded it here: [URL='https://www.virustotal.com/gui/file/3472a64c600c322e859c70e342018aaf2a1f9b454ecf13eb46b2c2ac2fee27bc?nocache=1']VirusTotal[/URL] It is indeed LummaStealer. One of our analysts already worked on that malware family, hence we have a proper detection name here. It also sets the user agent TeslaBrowser/5.5 for its requests which is mentioned in this [URL='https://medium.com/s2wblog/lumma-stealer-targets-youtubers-via-spear-phishing-email-ade740d486f7']article about LummaStealer[/URL] [ATTACH type="full" alt="1692989387149.png"]278122[/ATTACH] [/QUOTE]
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