Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 bae3d678224e6e93…

MALICIOUS

Office (OLE) / .XLS

698.5 KB Created: 2021-01-13 16:46:36 Authoring application: Microsoft Excel
MD5: cfb9c19b6be349c52e5d0d001f03ea85 SHA-1: ec9d80d0d794643988faa894e25f9aa3345f45f4 SHA-256: bae3d678224e6e93b486c9cc1c6918c7efd715b841f5cfa8e8c63cf520adbe9c
288 Risk Score

Malware Insights

Dridex · confidence 95%

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

The file is identified as a Dridex dropper by ClamAV. High-severity heuristics indicate the presence of a Workbook_Open VBA macro that uses GetObject and references Windows Script Host, suggesting it's designed to download and execute a second-stage payload. Several unknown reputation URLs were extracted, likely serving as the distribution points for the 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 http://appliedlogisticalconcepts.com/wp-content/plugins/rounding-master/demo-importer/demo/MRbjhZoUav.php
    • https://plomberielafleur.com/wp-content/plugins/js_composer/config/buttons/yhNkVgbHfkia6f.php
    • https://www.blackoutthebox.com/wp-content/plugins/woocommerce/src/Admin/NsWEtEuMIGClJnM.php
    • http://univertech.com/wp-includes/js/tinymce/plugins/charmap/huR9GcNBnM6.php
    • https://www.testsurver.nl/everything/wp-content/uploads/2020/01/zuUDqJvjLWS.php
    • https://izwan.mindscope.my/dI7vQ3mHBd7Djv.php
    • http://farabiit.xyz/sofomart/wp-includes/js/mediaelement/renderers/ZJR1EGiQKMGT.php
    • https://cjombogo.com/edenlingerie/wp-content/themes/kallyas/Licensing/VxXWED2rFvEA.php
    • http://alarmascancun.com.mx/wp-content/themes/vw-security-guard/template-parts/header/dvhW3tqNnyOlf.php
    • http://linia.rs/css/theme/GSB36ZV2sQVn.php
    • http://www.w3.org/1999/XSL/Transform

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
98a49b972e3f0f35d5f6227c360377d52800d9972734103e93450fb3f261eb44		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 57703 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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