Office (OLE) / .DOC malware analysis — malicious · 643aac263025e8b9

MALICIOUS

Office (OLE) / .DOC

431.0 KB Created: 2021-08-30 13:15:00 Authoring application: Microsoft Office Word

MD5: 4302bf2881c2ede737ae438fb4427f01 SHA-1: a24199b5c55e2b8c35186d9d6189f36d15540bae SHA-256: 643aac263025e8b90c9458a56508d49624e504c0dbf20bdc06f7630cf89d9035

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 that triggers on Document_Open. The macro attempts to create a file in the user templates directory and then opens it with a password, suggesting it is part of a downloader or dropper chain. The presence of a Document_Open macro and the embedded nature of the macro strongly indicate a spearphishing attachment attack 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.

Filename	Kind	Source	Size
`macros.bas` `9f487c36b82e274d38967e56a8d06fd191f49441ba17aa6311c462af13709465`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2955 bytes
`ole10native_00.bin` `8a693df914d6ee4c5d112146540c1341c281a4de7388eca63d260251a81f558c`	ole-package	OLE Ole10Native stream: ObjectPool/_1691808959/Ole10Native	256303 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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