Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 1e98e612249a7021…

MALICIOUS

Office (OLE) / .XLS

852.0 KB Created: 2021-01-13 16:10:35 Authoring application: Microsoft Excel
MD5: 0f2bf8e4e3e5c913f80b107afb512a92 SHA-1: 4253b6482fc02873f319c9f154d2b25af73744f2 SHA-256: 1e98e612249a70213c5962fa546f54ac53eed8002597b03a2a9de4cc64ca5399
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 Dridex dropper by ClamAV. High-severity heuristics indicate the presence of VBA macros, specifically a Workbook_Open auto-execution macro that uses GetObject and references Windows Script Host. This suggests the macro is designed to download and execute a second-stage payload from one of the embedded URLs. The document body is minimal, offering no specific lure beyond the implicit threat of macro execution.

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://GesDoc.fda.com.pe/wp-content/plugins/members/addons/members-acf-integration/XOIFkw1QtbqgkS.php
    • http://kurdcoding.com/RokUoZsNpAt8mc.php
    • http://www.sarcars.in/wp-includes/js/tinymce/themes/inlite/Fj1Me7I5aqhuT.php
    • http://linia.rs/css/theme/GSB36ZV2sQVn.php
    • https://abm-it.com/wp-content/plugins/wordpress-seo/vendor/composer/RJiulqq6iCYBeO.php
    • https://orzelconsulting.com/tabo/wp-includes/Text/Diff/Engine/zxZqMg7MRwiAqm.php
    • https://guides1815.be/admin_bkpe/fckeditor/editor/skins/default/vmLyYWik62.php
    • http://alarmascancun.com.mx/wp-content/themes/vw-security-guard/template-parts/header/dvhW3tqNnyOlf.php
    • https://www.blackoutthebox.com/wp-content/plugins/woocommerce/src/Admin/NsWEtEuMIGClJnM.php
    • http://appliedlogisticalconcepts.com/wp-content/plugins/rounding-master/demo-importer/demo/MRbjhZoUav.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
b704f2320f71aa1cf4e8fdb25d7fde49f25a2c318917f12dd362219094ac3e52		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 63450 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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