Dridex — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 83386fb9fa084ea2…

MALICIOUS

Office (OLE) / .XLS

724.0 KB Created: 2021-01-13 16:58:15 Authoring application: Microsoft Excel
MD5: d65ddb3ade34504d44e72ba9db953916 SHA-1: 8bcccc3bce9568919160024dbc3144de359f2d5f SHA-256: 83386fb9fa084ea2de1f106d155a819b8090f95c28ed7a0f3c9756910bcedc5b
142 Risk Score

Malware Insights

Dridex · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell

The file is detected as a Dridex dropper by ClamAV. Heuristics indicate the presence of VBA macros with auto-execution and Windows Script Host references, suggesting an attempt to run malicious code. Although VBA macros could not be extracted directly, the presence of an auto-executing VBA function and references to WScript strongly implies the execution of a malicious script. This script likely downloads and executes a second-stage payload from one of the embedded URLs.

Heuristics 5

  • 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
  • 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.
  • Unsupported Office format for VBA extraction info OFFICE_FORMAT_UNSUPPORTED
    olevba could not extract VBA macros (AssertionError); format-agnostic byte-level scans still ran. Likely legacy, encrypted, or malformed OLE/OOXML — re-scanning the same bytes will yield the same outcome.
  • 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://adsofonline.com/wp-includes/js/tinymce/plugins/charmap/SdmAPGR17.php
    • http://farabiit.xyz/sofomart/wp-includes/js/mediaelement/renderers/ZJR1EGiQKMGT.php
    • http://klimmen.com.br/wp-content/themes/one-page-express/customizer/kirki/includes/output/property/fOqqPp4HlYJu.php
    • https://www.cutandscrew.com/css/images/icons/light/dark/bwvTFSxdRMx8u.php
    • https://www.blackoutthebox.com/wp-content/plugins/woocommerce/src/Admin/NsWEtEuMIGClJnM.php
    • https://amazecorp.com/iS4eqxbadEt.php
    • https://GesDoc.fda.com.pe/wp-content/plugins/members/addons/members-acf-integration/XOIFkw1QtbqgkS.php
    • http://sefinancer.fr/wp-content/themes/twentynineteen/sass/blocks/SlyOzj2S7kfU8q.php
    • http://kurdcoding.com/RokUoZsNpAt8mc.php
    • http://www.w3.org/1999/XSL/Transform

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