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

Static analysis result for SHA-256 0405ec33b626eaeb…

MALICIOUS

Office (OLE) / .DOC

430.5 KB Created: 2021-09-01 09:53:00 Authoring application: Microsoft Office Word
MD5: b1b1f3740b0ee78deeb1474092d885c0 SHA-1: 1577f2853b6e72a4448ce85e0166be0ea6f728fd SHA-256: 0405ec33b626eaebad4e45c116d01bd38471398dfc68c7f86de794a3463548a3
104 Risk Score

Malware Insights

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

The sample is a malicious Word document containing a VBA macro triggered by the Document_Open event. This macro attempts to copy itself to the user's template directory and then opens a password-protected document. The presence of the Document_Open macro and the embedded VBA code strongly suggests an attempt to deliver a secondary payload or establish persistence, characteristic of a phishing attachment.

Heuristics 5

  • Office EPRINT stream contains EMF object high CVE related OLE_EPRINT_EMF_OBJECT
    OLE ObjectPool contains an EPRINT stream with EMF data. This is rare in normal documents and is CVE-2007-3893/MS07-046-family evidence when paired with Office exploit payload anomalies, but the malformed EMF record is not proven by this rule alone.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact info 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.
  • 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/office/2006/encryption
    • http://schemas.microsoft.com/office/2006/keyEncryptor/password
    • http://schemas.microsoft.com/office/2006/keyEncryptor/certificate
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
4c7ebbe27a3fd1f49f70273560c51b23aaebeda6441bc10c13b31718650b6c5e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2977 bytes
ole10native_00.bin
7f6ebc3571e71e7a48dfce81da927b625a89a9fa7147723517115553392ddfbb		 ole-package OLE Ole10Native stream: ObjectPool/_1691969878/Ole10Native 255279 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.

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