Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 2f34e34033c25325…

MALICIOUS

Office (OLE) / .XLS

886.0 KB Created: 2021-01-13 17:13:40 Authoring application: Microsoft Excel
MD5: d7213d92bb25a6163ab3b79ba75f95a0 SHA-1: 9e7d2f00b517a32d2f69ac0c41e48d09507abf5b SHA-256: 2f34e34033c25325694ee6e100e8b2c0deff78d0527acd72ebc598048ba74fe5
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 file contains a Workbook_Open macro that uses GetObject to execute code, a common technique for malware droppers. The ClamAV heuristic specifically identifies it as Doc.Dropper.Dridex-9845759-0. The embedded URLs are likely used to download and execute a second-stage payload. The VBA p-code auto-execution with execution tokens further supports the malicious intent.

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://guides1815.be/admin_bkpe/fckeditor/editor/skins/default/vmLyYWik62.php
    • http://napletonvolkswagen.com/M/HF840TfNngNdGR.php
    • http://adsofonline.com/wp-includes/js/tinymce/plugins/charmap/SdmAPGR17.php
    • https://orzelconsulting.com/tabo/wp-includes/Text/Diff/Engine/zxZqMg7MRwiAqm.php
    • http://kurdcoding.com/RokUoZsNpAt8mc.php
    • https://izwan.mindscope.my/dI7vQ3mHBd7Djv.php
    • https://dev.unitedwebgroup.com/jimmychesterfield.com/wp-includes/SimplePie/Decode/HTML/bAn3295lG3oxSND.php
    • http://appliedlogisticalconcepts.com/wp-content/plugins/rounding-master/demo-importer/demo/MRbjhZoUav.php
    • http://multi-chemical.com/Rvlx1evnUjlGIy.php
    • http://usmartnet.co.uk/wp-content/themes/twentyseventeen/template-parts/footer/pODsiHRo.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
5ed00aec412c671491654da27dbee33e29132ac5f5a5eaf083104b2cacb13878		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 69852 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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