Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 137bdd679664e951…

MALICIOUS

Office (OLE) / .XLS

730.5 KB Created: 2021-01-13 16:39:58 Authoring application: Microsoft Excel
MD5: 59539fde938ac6da898bd587f1850c96 SHA-1: 2fb5d4ffe1a88cffe59463ac2e7e3996574b1556 SHA-256: 137bdd679664e951ea9c919cb447b64d6d24251c406350e78471c1d589f12706
250 Risk Score

Malware Insights

Dridex · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains a Workbook_Open macro that executes obfuscated VBA code. This code likely uses GetObject to interact with Windows Script Host and potentially download a second-stage payload from one of the embedded URLs. The ClamAV detection name 'Doc.Dropper.Dridex-9845759-0' strongly suggests a Dridex family infection, which commonly uses macro-enabled documents to deliver its payload.

Heuristics 8

  • 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
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://izwan.mindscope.my/dI7vQ3mHBd7Djv.php
    • https://dev.unitedwebgroup.com/jimmychesterfield.com/wp-includes/SimplePie/Decode/HTML/bAn3295lG3oxSND.php
    • https://www.bloggingtag.com/wp-includes/js/tinymce/plugins/charmap/B3w9zcmN.php
    • https://sma.shardanovelty.co.in/vendor/psr/log/Psr/Log/kXNcyAm11boPD0d.php
    • https://holylandblessing.com/css/font-awesome/css/micons/fonts/H3yKJwPPyD.php
    • https://GesDoc.fda.com.pe/wp-content/plugins/members/addons/members-acf-integration/XOIFkw1QtbqgkS.php
    • https://www.testsurver.nl/everything/wp-content/uploads/2020/01/zuUDqJvjLWS.php
    • http://sefinancer.fr/wp-content/themes/twentynineteen/sass/blocks/SlyOzj2S7kfU8q.php
    • http://www.sarcars.in/wp-includes/js/tinymce/themes/inlite/Fj1Me7I5aqhuT.php
    • http://pidebh.com/wp-content/plugins/woocommerce/src/Admin/ldaoxOBdp.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
27dc6f762cb068f82fa98a7d46185e69bcc764d8f10ad08dc43aa3f00fcf016f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 65880 bytes

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