Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 08a4f7ec8149e54a…

MALICIOUS

Office (OLE) / .XLS

700.0 KB Created: 2021-01-13 16:12:49 Authoring application: Microsoft Excel
MD5: f701a2158fc4a868d23a084343462fd0 SHA-1: ebe1522c21f37590b6e2f2b7a04a79fd52de028f SHA-256: 08a4f7ec8149e54ab39741f32f4f877257c5bc3cb1473b7cca0c86b58f0abcf2
250 Risk Score

Malware Insights

Dridex · confidence 95%

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

The file is an Excel spreadsheet containing a Workbook_Open VBA macro, which is a common technique for initiating malicious actions upon opening. The macro references Windows Script Host and uses GetObject, indicating it's designed to execute code. The ClamAV detection as 'Doc.Dropper.Dridex-9845759-0' strongly suggests a Dridex family infection, which often uses macros to download and execute further payloads. The numerous unknown-reputation URLs are likely C2 or payload hosting locations.

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://webinlavorazione.it/HjU8tH3k.php
    • http://kurdcoding.com/RokUoZsNpAt8mc.php
    • https://mpcleaning.com.ng/P0NQTl1AU.php
    • http://mek-one.com/test/hwdWR7DS.php
    • https://www.testsurver.nl/everything/wp-content/uploads/2020/01/zuUDqJvjLWS.php
    • http://klimmen.com.br/wp-content/themes/one-page-express/customizer/kirki/includes/output/property/fOqqPp4HlYJu.php
    • https://www.dropsitelite.it/wp-content/plugins/woocommerce-services/i18n/json/on0rRPN6iWl5uT.php
    • https://yogiramsuratkumar.com/album/res/contentflow/img/r7QOWIwYj5.php
    • https://izwan.mindscope.my/dI7vQ3mHBd7Djv.php
    • http://nilfotech.com/wp-content/themes/twentyseventeen/template-parts/footer/5nVJ6aVS88.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1901487250d6ea3531b0b9792da08bc9d967292e81c49cad3e02d437d4f23d1d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 54317 bytes

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