Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 f3c837323c135a7d…

MALICIOUS

Office (OLE) / .XLS

712.5 KB Created: 2021-01-13 12:50:17 Authoring application: Microsoft Excel
MD5: b85ecc80652b17815971cc13eb057e54 SHA-1: dd8a1d3ecc7a27d39aaf60c438ef8374a3afe887 SHA-256: f3c837323c135a7d7ed9d03f856c81463abb80174211117f4bda193a55f1b78e
288 Risk Score

Malware Insights

Dridex · confidence 95%

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

The sample contains a Workbook_Open macro that uses GetObject and Environ calls, indicative of malicious activity. The ClamAV detection and heuristic firings strongly suggest this is a Dridex dropper. The VBA macros likely download and execute a second-stage payload from one of the embedded URLs.

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://www.dropsitelite.it/wp-content/plugins/woocommerce-services/i18n/json/on0rRPN6iWl5uT.php
    • https://animalairlines.org/wp-content/plugins/wordpress-seo/inc/options/Tk2xzwhpHuJENF.php
    • https://www.bloggingtag.com/wp-includes/js/tinymce/plugins/charmap/B3w9zcmN.php
    • http://alarmascancun.com.mx/wp-content/themes/vw-security-guard/template-parts/header/dvhW3tqNnyOlf.php
    • https://plomberielafleur.com/wp-content/plugins/js_composer/config/buttons/yhNkVgbHfkia6f.php
    • https://mpcleaning.com.ng/P0NQTl1AU.php
    • http://hedgelong.com/NJm75ajGNU.php
    • https://yogiramsuratkumar.com/album/res/contentflow/img/r7QOWIwYj5.php
    • http://sefinancer.fr/wp-content/themes/twentynineteen/sass/blocks/SlyOzj2S7kfU8q.php
    • http://klimmen.com.br/wp-content/themes/one-page-express/customizer/kirki/includes/output/property/fOqqPp4HlYJu.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
298483dff0b68f6969d50d3065864e04eefeffc26fdb5bdea828061c77007d91		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 56326 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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