Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 c0a8c23300759721…

MALICIOUS

Office (OLE) / .XLS

754.0 KB Created: 2021-01-13 16:00:43 Authoring application: Microsoft Excel
MD5: a7c84a17014509d3e69380f698076410 SHA-1: 2b08b57a0af1479c08143eafd23c62950ed1a394 SHA-256: c0a8c233007597217aa3f0e214037fbc97d84cba383411ce60921083079df7c1
288 Risk Score

Malware Insights

Dridex · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The presence of a Workbook_Open macro, GetObject calls, and references to Windows Script Host strongly indicate malicious intent. The ClamAV detection as 'Doc.Dropper.Dridex-9845759-0' further supports this. The VBA macros likely download and execute a second-stage payload from one of the embedded URLs, consistent with Dridex dropper behavior.

Heuristics 9

  • 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.
  • 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 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://dev.unitedwebgroup.com/jimmychesterfield.com/wp-includes/SimplePie/Decode/HTML/bAn3295lG3oxSND.php
    • http://millepharma.com/1/storage/modification/catalog/controller/TuF2Sj1GiNaxO7W.php
    • http://bachelor-bdx.net/E5LZUwzOG5MJ.php
    • https://GesDoc.fda.com.pe/wp-content/plugins/members/addons/members-acf-integration/XOIFkw1QtbqgkS.php
    • https://easyweber.net/layouts/layout1/wp-includes/Requests/Auth/BTjT6wKTxx0.php
    • https://gracejukes.com/wp-content/plugins/elementor/data/base/dQ37ktCYJatfHdX.php
    • https://www.dropsitelite.it/wp-content/plugins/woocommerce-services/i18n/json/on0rRPN6iWl5uT.php
    • https://www.bloggingtag.com/wp-includes/js/tinymce/plugins/charmap/B3w9zcmN.php
    • http://nilfotech.com/wp-content/themes/twentyseventeen/template-parts/footer/5nVJ6aVS88.php
    • https://www.testsurver.nl/everything/wp-content/uploads/2020/01/zuUDqJvjLWS.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
48a8be878ada0615377d3e34b3051e41ca4d7c8651a6bea7a9a4cfaaba95759c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 16571 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 125 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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