Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 2f99f137ccfabdc6…

MALICIOUS

Office (OLE) / .XLS

814.0 KB Created: 2021-01-13 17:27:20 Authoring application: Microsoft Excel
MD5: 08b8f5fdfe51f4c656e8fb00c78a1e71 SHA-1: 3313966cbebfaf302ae2e260b0432b8ed735f39d SHA-256: 2f99f137ccfabdc69cfbffb4805a07cf53310271e627b4f2f2291dc9b9afb5fd
288 Risk Score

Malware Insights

Dridex · confidence 95%

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

The sample is identified as a malicious Excel document by ClamAV, specifically a Dridex dropper. It contains a Workbook_Open macro that utilizes GetObject and references Windows Script Host, indicating it's designed to execute a secondary payload. The numerous unknown-reputation URLs suggest potential download locations for this payload.

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://easyweber.net/layouts/layout1/wp-includes/Requests/Auth/BTjT6wKTxx0.php
    • https://ivfcyprusglobal.com/ZNRXE31LjKXl.php
    • https://www.blackoutthebox.com/wp-content/plugins/woocommerce/src/Admin/NsWEtEuMIGClJnM.php
    • https://impulsionfood.com/wp-content/plugins/updraftplus/css/tether-shepherd/ipaO64BN.php
    • https://www.dropsitelite.it/wp-content/plugins/woocommerce-services/i18n/json/on0rRPN6iWl5uT.php
    • http://klimmen.com.br/wp-content/themes/one-page-express/customizer/kirki/includes/output/property/fOqqPp4HlYJu.php
    • http://millepharma.com/1/storage/modification/catalog/controller/TuF2Sj1GiNaxO7W.php
    • http://www.sarcars.in/wp-includes/js/tinymce/themes/inlite/Fj1Me7I5aqhuT.php
    • https://gracejukes.com/wp-content/plugins/elementor/data/base/dQ37ktCYJatfHdX.php
    • http://univertech.com/wp-includes/js/tinymce/plugins/charmap/huR9GcNBnM6.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
b2f4cf4df090dbe9da2574afa8763421de66e75b520f0b038e8efdfa0a7891ea		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 64702 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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