Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a3a7aaa54595ae0a…

MALICIOUS

Office (OLE)

672.5 KB Created: 2004-03-29 22:32:10 Authoring application: Microsoft Excel
MD5: d376ec145b458e5a02eb80e90807ad47 SHA-1: 93d79e0afb208098df7aab7047d0e336af5b8a92 SHA-256: a3a7aaa54595ae0a834d748e44a0665dbbcdf48a8f09dac08b018081a927ab32
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.001 PowerShell

The sample is an Excel file containing obfuscated VBA macros, indicated by the 'OLE_VBA_MACROS' and 'EXTRACTED_FILE_STATIC_TRIAGE' heuristics. The 'OLE_VBA_CREATEOBJ' heuristic suggests the macros are designed to execute arbitrary code. The 'SE_INVOICE_LURE' heuristic indicates the document content is likely a fake invoice or payment notification to trick the user into enabling macros. No specific malware family could be identified, but the presence of macros and the lure suggest a downloader or initial access payload.

Heuristics 5

  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://schemas.microsoft.com/sharepoint/v3/contenttype/forms
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml
    • http://schemas.microsoft.com/office/2006/metadata/contentType
    • http://schemas.microsoft.com/office/2006/metadata/properties/metaAttributes
    • http://schemas.microsoft.com/office/2006/metadata/properties
    • http://www.w3.org/2001/XMLSchema
    • http://schemas.openxmlformats.org/package/2006/metadata/core-properties
    • http://www.w3.org/2001/XMLSchema-instance
    • http://purl.org/dc/elements/1.1/
    • http://purl.org/dc/terms/
    • http://schemas.microsoft.com/office/internal/2005/internalDocumentation
    • http://dublincore.org/schemas/xmls/qdc/2003/04/02/dc.xsd
    • http://dublincore.org/schemas/xmls/qdc/2003/04/02/dcterms.xsd

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
83a7726911a3abf2b11072b3b34349b9af9292e8cde6f8232588e052a39859a4		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 88067 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 17 Chr/ChrW string-construction calls.

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