{"id":1375,"date":"2026-02-18T09:04:24","date_gmt":"2026-02-18T09:04:24","guid":{"rendered":"https:\/\/blog.ibvl.in\/index.php\/2026\/02\/18\/tracking-malware-campaigns-with-reused-material-wed-feb-18th\/"},"modified":"2026-02-18T09:04:24","modified_gmt":"2026-02-18T09:04:24","slug":"tracking-malware-campaigns-with-reused-material-wed-feb-18th","status":"publish","type":"post","link":"https:\/\/blog.ibvl.in\/index.php\/2026\/02\/18\/tracking-malware-campaigns-with-reused-material-wed-feb-18th\/","title":{"rendered":"Tracking Malware Campaigns With Reused Material, (Wed, Feb 18th)"},"content":{"rendered":"
\n

A few days ago I wrote a diary called “Malicious Script Delivering More Maliciousness”[1<\/a>]. In the malware infection chain, there was a JPEG picture that embedded the last payload delimited with “BaseStart-” and “-BaseEnd” tags.<\/p>\n

Today, I discovered anoher campaign that relies exactly on the same technique. It started with an attachment called “TELERADIO_IB_OBYEKTLRIN_BURAXILIS_FORMASI.xIs” (SHA256:1bf3ec53ddd7399cdc1faf1f0796c5228adc438b6b7fa2513399cdc0cb865962). The file in itself is not interesting, it contains a good old Equation Editor exploit (%%cve:2017-11882%%). The exploit triggers the download of an HTA payload that executes\u00a0a PowerShell payload and finally a DLL:<\/p>\n

\"\"<\/p>\n

When I investigated the different payload, there was pretty simple to deobfuscated, the interesting code was polluted with Unicode characters. First the HTA file was downloaded from:<\/p>\n

\nhxxp:\/\/192[.]3[.]101[.]19\/31\/sd878f23823878428348fd8g8g8384838f3453dfg.hta<\/pre>\n
The interesting code is here and you can easily spot the “powershell” string, no need to use AI for this \ud83d\ude42<\/p>\n
\"\"<\/p>\n
The Powershell payload will fetch another file:<\/p>\n
\nhxxps:\/\/172[.]245[.]155[.]116\/img\/optimized_MSI.png<\/pre>\n
Do you make the link with my previous diary? It’s the same picture:<\/p>\n
\"\"<\/p>\n
The technique is also exactly the same, the next stage is Base64-encoded and delimited by the same tags:<\/p>\n
\"\"<\/p>\n
The extracted payload is a .Net binary (SHA256:adc2f550e7ff2b707a070ffaa50fc367af6a01c037f1f5b347c444cca3c9a650).<\/p>\n
The fast that the same picture is re-used looks interesting! I did a quick search on VT and use the feature to search for similarities based on the icon\/thumbnail and found a lot of identical pictures:<\/p>\n
\"\"<\/p>\n
846 similar pictures have been reported but\u00a0only 36 have a VT score above 5. I created a YARA rule to track them, just curious…<\/p>\n
[1]\u00a0https:\/\/isc.sans.edu\/diary\/Malicious+Script+Delivering+More+Maliciousness\/32682<\/a><\/p>\n
Xavier Mertens (@xme)
\nXameco
\nSenior ISC Handler – Freelance Cyber Security Consultant
\nPGP Key<\/a><\/p>\n
 (c) SANS Internet Storm Center. https:\/\/isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"
A few days ago I wrote a diary called “Malicious Script Delivering More Maliciousness”[1]. In the malware infection chain, there was a JPEG picture that embedded the last payload delimited with “BaseStart-” and “-BaseEnd” tags. Today, I discovered anoher campaign that relies exactly on the same technique. It started with an attachment called “TELERADIO_IB_OBYEKTLRIN_BURAXILIS_FORMASI.xIs” (SHA256:1bf3ec53ddd7399cdc1faf1f0796c5228adc438b6b7fa2513399cdc0cb865962). […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[90],"tags":[91],"class_list":["post-1375","post","type-post","status-publish","format-standard","hentry","category-cybersecurity","tag-cybersecurity"],"yoast_head":"\nTracking Malware Campaigns With Reused Material, (Wed, Feb 18th) - Imperative Business Ventures Limited<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.ibvl.in\/index.php\/2026\/02\/18\/tracking-malware-campaigns-with-reused-material-wed-feb-18th\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tracking Malware Campaigns With Reused Material, (Wed, Feb 18th) - Imperative Business Ventures Limited\" \/>\n<meta property=\"og:description\" content=\"A few days ago I wrote a diary called “Malicious Script Delivering More Maliciousness”[1]. 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