Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 0b110be9ae7f5755…

MALICIOUS

Office (OLE) / .XLS

805.5 KB Created: 2021-01-13 15:53:15 Authoring application: Microsoft Excel
MD5: 90501b4eda1eaacd5773c77717050e51 SHA-1: 31a5e6dab54af69ff3991af5f3c2e8fc83daf975 SHA-256: 0b110be9ae7f5755dad4e964cd94566a0252586a000feb669c5dd75b2307b214
250 Risk Score

Malware Insights

Dridex · confidence 95%

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

The presence of a Workbook_Open VBA macro, along with heuristics for GetObject and Windows Script Host, strongly indicates malicious intent. The macro code, though obfuscated, appears to construct a URL from concatenated strings and likely downloads a second-stage payload. The ClamAV detection as 'Doc.Dropper.Dridex-9845759-0' further supports the Dridex family attribution and the dropper functionality.

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 http://mek-one.com/test/hwdWR7DS.php
    • https://guides1815.be/admin_bkpe/fckeditor/editor/skins/default/vmLyYWik62.php
    • https://impulsionfood.com/wp-content/plugins/updraftplus/css/tether-shepherd/ipaO64BN.php
    • http://multi-chemical.com/Rvlx1evnUjlGIy.php
    • http://go7wallet.com/app/plugins/cordova-plugin-statusbar/src/browser/HLn3obcR1vMJZNt.php
    • http://sefinancer.fr/wp-content/themes/twentynineteen/sass/blocks/SlyOzj2S7kfU8q.php
    • http://appliedlogisticalconcepts.com/wp-content/plugins/rounding-master/demo-importer/demo/MRbjhZoUav.php
    • http://pidebh.com/wp-content/plugins/woocommerce/src/Admin/ldaoxOBdp.php
    • http://millepharma.com/1/storage/modification/catalog/controller/TuF2Sj1GiNaxO7W.php
    • https://webinlavorazione.it/HjU8tH3k.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
159f2ae9022ee6d395729b1d36a337f16f11cb03eda945bf3ec336f789051791		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 54991 bytes

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