Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 b4fa49afb10b8ceb…

MALICIOUS

Office (OLE) / .XLS

718.0 KB Created: 2021-01-13 14:46:08 Authoring application: Microsoft Excel
MD5: fcd41b38e1a97fa769c5a9383b3652da SHA-1: bf5e3db26379cbc9dab2256d87a84c78f222e56e SHA-256: b4fa49afb10b8ceb2cbf7c422be2c024be8f298988da16d436df0a136ece5bf3
142 Risk Score

Malware Insights

Dridex · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell

The file was detected by ClamAV as Doc.Dropper.Dridex-9845759-0, indicating it is likely a Dridex dropper. The presence of a VBA auto-execution function (Workbook_Open) that uses GetObject suggests an attempt to run malicious code. Although VBA macros could not be extracted, the heuristic firing for Windows Script Host references and the numerous unknown-reputation URLs indicate a likely attempt to download and execute a second-stage payload.

Heuristics 5

  • ClamAV: Doc.Dropper.Dridex-9845759-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Dridex-9845759-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Unsupported Office format for VBA extraction info OFFICE_FORMAT_UNSUPPORTED
    olevba could not extract VBA macros (AssertionError); format-agnostic byte-level scans still ran. Likely legacy, encrypted, or malformed OLE/OOXML — re-scanning the same bytes will yield the same outcome.
  • 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://www.testsurver.nl/everything/wp-content/uploads/2020/01/zuUDqJvjLWS.php
    • http://bachelor-bdx.net/E5LZUwzOG5MJ.php
    • https://yogiramsuratkumar.com/album/res/contentflow/img/r7QOWIwYj5.php
    • https://www.blackoutthebox.com/wp-content/plugins/woocommerce/src/Admin/NsWEtEuMIGClJnM.php
    • http://napletonvolkswagen.com/M/HF840TfNngNdGR.php
    • http://univertech.com/wp-includes/js/tinymce/plugins/charmap/huR9GcNBnM6.php
    • http://omjeemart.com/ksbmadmin/source/vendor/phpunit/php-code-coverage/Y8z6bnvahXwNw.php
    • https://travelspyders.com/wp-content/plugins/cartflows/theme-support/astra/ZaUT8RbcNuB7.php
    • https://gracejukes.com/wp-content/plugins/elementor/data/base/dQ37ktCYJatfHdX.php
    • http://royalvacations.co.zw/fonts/flaticon/font/V701kINZ491h.php
    • http://www.w3.org/1999/XSL/Transform

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