Dridex — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 efad6d0075cf5fdd…

MALICIOUS

Office (OOXML) / .XLSM

70.3 KB Created: 2021-04-28 11:54:08 UTC Authoring application: Microsoft Excel 15.0300
MD5: 457bdfe88d968e41a6672db42de338e4 SHA-1: 321dd4303c0ec1a78d48951b3beed029af18f500 SHA-256: efad6d0075cf5fdd586c3b0cf2274e8ec51914becc639af00cad47565b72a2fe
208 Risk Score

Malware Insights

Dridex · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The presence of a Workbook_Open macro and a CreateObject call strongly indicates malicious intent. The ClamAV detection as 'Xls.Downloader.DridexDarkGreen1020210-9905041-0' further supports this. The VBA macros likely download and execute a second-stage payload from one of the provided URLs, consistent with Dridex downloader behavior.

Heuristics 7

  • ClamAV: Xls.Downloader.DridexDarkGreen1020210-9905041-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.DridexDarkGreen1020210-9905041-0
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://sellmain.com/wp-includes/js/tinymce/skins/lightgray/akNfC32o.php
    • https://kamnahonda.com/wp-content/plugins/wordpress-seo/vendor_prefixed/guzzlehttp/NSEqEJ2bjvebrG1.php
    • https://opg-novak.hr/wp-content/ngg/modules/photocrati-widget/templates/CMUt0pqaeNmph.php
    • https://armi-skipper.host/vedomosti.xyz/wp-content/plugins/website-monetization-by-magenet/css/nijoiYEK1rc3F.php
    • https://irontechnologycnc.ro/wp-content/themes/twentynineteen/sass/blocks/1ORgpmJIQwUoOJ.php
    • https://cassiel.com.ar/fonts/font-awesome/css/YGdmxjgBiGTWuo.php
    • https://projectedconsulting.com.au/wp-content/themes/twentynineteen/template-parts/content/BgKQXNRm90Huo.php
    • https://luxtonace.com/luxton/plugins/ckeditor/plugins/a11yhelp/9Gysz7pXb.php
    • https://test2.multiversidadglocal.org/availability/condition/group/yui/build/p0R6P2rEX.php

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
5fb8cefa1d73e420bce1f1e4d64644ae07dcef3589ffb3151cc537dc608efafc		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 10329 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
7afe18edf97f30e994da2de2aaaa8eaf78036b15fc5741b364383c4b656b7459		 vba-project OOXML VBA project: xl/vbaProject.bin 53760 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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