Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 b974c4344ec187e6…

MALICIOUS

Office (OLE) / .DOC

75.5 KB Created: 2021-10-04 18:32:00 Authoring application: Microsoft Office Word
MD5: 40f5282728af8a4ca1059788010b287e SHA-1: bce3f8abf0f3bb483be7be50961d923829072f65 SHA-256: b974c4344ec187e6c3a763317faec68872d613802fc3ee273dceb1032ea1a13f
122 Risk Score

Malware Insights

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

The sample is a malicious Word document containing VBA macros. The AutoOpen macro is triggered upon opening the document, which is designed to display a lure to the user to enable macros. Once enabled, the script reconstructs and writes a HTA file named 'cleanEarthExcel.....hta.' to disk and then executes it. This HTA file is likely a second-stage payload.

Heuristics 5

  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
91a3d47a617756cb481755c91cc680b9b7beaac6df8047063054e5ea0c39f194		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1178 bytes

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