Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 7bebb1f39af44412…

MALICIOUS

Office (OLE) / .XLS

707.5 KB Created: 2021-01-13 12:38:44 Authoring application: Microsoft Excel
MD5: 36e8e3ce267eed9890d07b45b339a71b SHA-1: 47e662c6d5041836ba207ad2e6ed22a99ca1a4da SHA-256: 7bebb1f39af44412c5a7d8263d4fdae5ec1f234ad2f96e6f07add6daa3ce9b0a
288 Risk Score

Malware Insights

Dridex · confidence 95%

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

The file contains a Workbook_Open macro that uses GetObject and WScript references, indicative of malicious intent. The ClamAV detection and heuristic firings strongly suggest this is a Dridex dropper. The embedded URLs are likely used to download and execute a second-stage 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://pm.marketingnetwork.it/wp-includes/js/tinymce/skins/lightgray/CcV1lWG3FwB1i.php
    • http://millepharma.com/1/storage/modification/catalog/controller/TuF2Sj1GiNaxO7W.php
    • https://ivfcyprusglobal.com/ZNRXE31LjKXl.php
    • http://findmysounds.com/wp-content/plugins/updraftplus/central/classes/Qexo3HCh.php
    • http://pidebh.com/wp-content/plugins/woocommerce/src/Admin/ldaoxOBdp.php
    • http://klimmen.com.br/wp-content/themes/one-page-express/customizer/kirki/includes/output/property/fOqqPp4HlYJu.php
    • http://multi-chemical.com/Rvlx1evnUjlGIy.php
    • http://go7wallet.com/app/plugins/cordova-plugin-statusbar/src/browser/HLn3obcR1vMJZNt.php
    • https://www.bloggingtag.com/wp-includes/js/tinymce/plugins/charmap/B3w9zcmN.php
    • https://mpcleaning.com.ng/P0NQTl1AU.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
838b8af8cf3aa471f1502b35f40ca5fe638895752b86ffef2d0997df377ddd31		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 47470 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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