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

Static analysis result for SHA-256 89783756c7288b8d…

MALICIOUS

Office (OLE) / .DOC

805.0 KB Created: 2021-09-29 09:43:00
MD5: c43018a5f38a2b74bbc5198bbf40e98a SHA-1: 9d0a96a5dbc1595b072d75738125bf4dd1a3edc1 SHA-256: 89783756c7288b8d0a47bc759658884a6d531ce50666aadbf790e8cd1979cdf9
104 Risk Score

Malware Insights

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

The sample contains a VBA macro that executes upon opening the document (Document_Open). This macro appears to construct a path to a file named 'zoro.doc' and then attempts to open it with a hardcoded password 'doyouknowthatthegodsofdeathonlyeatapples?'. The macro also contains obfuscated string concatenations which are truncated, preventing a full analysis of its behavior. The presence of the Document_Open macro and the attempt to open a password-protected document strongly suggests a malicious intent to deliver a secondary payload.

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
0c3c9b8f5ce9862db8def707cb36b6b0d9e57b823687745ee752b7cc45e5e80d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3283 bytes
ole10native_00.bin
ba5cf57e4f9f250569935c1031bae5fb16c6867b3ec9c63ae7b695066320f964		 ole-package OLE Ole10Native stream: ObjectPool/_1694388549/Ole10Native 190246 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.

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