Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b307e46d3a2e5f84…

MALICIOUS

Office (OLE)

2.55 MB Created: 2004-03-29 22:32:10 Authoring application: Microsoft Excel
MD5: 0c5c23fc7e3b6175e3b66d8c1f50b691 SHA-1: 91180ab74b1690c16140553c5e9d0e417c0c3ad3 SHA-256: b307e46d3a2e5f840e824aa78b615becae36d3e3f127b32b07bd829b19014e28
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.002 Spearphishing Attachment

The file is an Excel document with a high-confidence detection for VBA macros and a CreateObject call, indicating malicious intent. The document body contains text that resembles an invoice or purchase order, aligning with the 'SE_INVOICE_LURE' heuristic. The presence of obfuscated VBA macros in 'macros.bas' suggests the execution of malicious code, likely for downloading further payloads or establishing persistence.

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
fc59519b22883a3bc4b92d5d69e092a5dcb409e29e44369b3d54a148acac2bfc		 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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