Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 32bad265ba9bf2a1…

MALICIOUS

Office (OLE) / .XLS

782.5 KB Created: 2021-01-13 12:41:17 Authoring application: Microsoft Excel
MD5: 65ebf79b583fd27fad0a55b89d9fd425 SHA-1: 5e84524792512b5a173e0b795f0a9185c3938dc7 SHA-256: 32bad265ba9bf2a1bc1aa65bf4dbd1d06571d15183e50062313323ea56873e7e
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 utilizes GetObject and Environ calls, indicative of malicious intent. The presence of VBA p-code auto-execution with execution tokens further strengthens this assessment. The ClamAV detection as 'Doc.Dropper.Dridex-9845759-0' strongly suggests a Dridex variant. The macro likely downloads and executes a second-stage payload from one of the embedded suspicious 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://orzelconsulting.com/tabo/wp-includes/Text/Diff/Engine/zxZqMg7MRwiAqm.php
    • http://go7wallet.com/app/plugins/cordova-plugin-statusbar/src/browser/HLn3obcR1vMJZNt.php
    • https://mpcleaning.com.ng/P0NQTl1AU.php
    • https://travelspyders.com/wp-content/plugins/cartflows/theme-support/astra/ZaUT8RbcNuB7.php
    • http://pidebh.com/wp-content/plugins/woocommerce/src/Admin/ldaoxOBdp.php
    • http://linia.rs/css/theme/GSB36ZV2sQVn.php
    • http://omjeemart.com/ksbmadmin/source/vendor/phpunit/php-code-coverage/Y8z6bnvahXwNw.php
    • https://animalairlines.org/wp-content/plugins/wordpress-seo/inc/options/Tk2xzwhpHuJENF.php
    • http://farabiit.xyz/sofomart/wp-includes/js/mediaelement/renderers/ZJR1EGiQKMGT.php
    • https://guides1815.be/admin_bkpe/fckeditor/editor/skins/default/vmLyYWik62.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
f37e51f92981b25426226f48d47db7b46d30ec69eafe9e5e552b46ff5304545c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 54073 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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