Office (OLE) / .DOC malware analysis — malicious · 871aba2e9ac4342c

MALICIOUS

Office (OLE) / .DOC

5.46 MB Created: 2009-12-01 09:13:00 Authoring application: Microsoft Office Word

MD5: 882e8d0dc5c7319d1161bf8ff441588e SHA-1: 2a5c03654d3eb8e79b0f4981f319f759bf9d9f23 SHA-256: 871aba2e9ac4342c16f9baf6b6aa8f47cde3c0c6767d733ad8d3e5cf6f63b622

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample is a Microsoft Office document with a high-confidence detection for VBA macros, specifically a Document_Open macro which is designed to execute automatically. The presence of a 'macros.bas' artifact further indicates malicious VBA code. While the document body appears to be technical specifications, the macro's likely intent is to download and execute a second-stage payload, a common technique for malware delivery. No specific family could be identified.

Heuristics 6

Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
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.
Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN

Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
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://www.iec.ch

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `577b4858cf1b694733dbeff3efe5ffdd3afc0ab487d1da2ef9bdc4826d85bbab`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	33644 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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