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

Static analysis result for SHA-256 97d914c94907ab33…

MALICIOUS

Office (OLE) / .DOC

339.5 KB Created: 2021-09-21 09:23:00 Authoring application: Microsoft Office Word
MD5: e586348b7757fdbac4bb5bd4262a4a93 SHA-1: 6765a49005ca227875bff5e769bfa0126037c16b SHA-256: 97d914c94907ab3366f3eede259301561ceb66d0b38d58d9ec653726eaa21ff3
104 Risk Score

Malware Insights

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

The sample contains a VBA macro within the Document_Open subroutine, which is designed to execute automatically when the document is opened. The macro attempts to create a file named 'diplo.docx' in the user's template path and then opens it with a hardcoded password '2281337'. This suggests a downloader or droppper functionality, aiming to execute further stages of the attack. The presence of an EMF object within an EPRINT stream also indicates a potential exploit vector.

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
410de0c41bd6d48af1dd27bd18c31a811f05600ec2f2879199e15817047f8d5f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3181 bytes
ole10native_00.bin
f502b64abd1a28406e4788de3ff0575aeaf0d7b6afb676709d2898872abb3c62		 ole-package OLE Ole10Native stream: ObjectPool/_1693695878/Ole10Native 162104 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.95, consistent with packed or encrypted content.

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