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

Static analysis result for SHA-256 5a117ddf8c511f00…

MALICIOUS

Office (OLE) / .DOC

430.5 KB Created: 2021-09-01 09:53:00 Authoring application: Microsoft Office Word
MD5: b1753a871800898ebe11813df769c4ec SHA-1: 319ba1d6b4e3f1a5e0f3c19ff06ce0a32bb69afe SHA-256: 5a117ddf8c511f003e4b03027da7e9dd44facbbb5c5e4e63a61e746692e2057c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is a Microsoft Word document containing a VBA macro that triggers on Document_Open. The macro attempts to create a file named 'glib.doc' in the user's template directory. The macro's logic suggests it is designed to download and execute a secondary payload, although the specific download mechanism is obfuscated. The presence of the Document_Open macro and the file creation attempt strongly indicate a malicious intent to compromise the user's system.

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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