Office (OLE) / .DOC malware analysis — malicious · c3c4f4f918261928

MALICIOUS

Office (OLE) / .DOC

623.5 KB Created: 2021-08-19 09:28:00 Authoring application: Microsoft Office Word

MD5: 9b4fcd22f6240318fa36a91922cfccf5 SHA-1: 795bbe08e711ccd3d1b9d6e49d6d85612f8f8e6f SHA-256: c3c4f4f918261928351db2ed00da67c43e9cb96d54b232252165f95653767b4c

104 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample is a malicious Microsoft Word document containing a VBA macro that executes upon opening. The macro appears to be designed to download and execute a second-stage payload, as indicated by the heuristic firings for OLE_VBA_MACROS and OLE_VBA_DOCOPEN. The script attempts to save a file to the user's template directory and then opens a password-protected document, suggesting a multi-stage infection process. The presence of the EMF object further supports malicious intent.

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` `bc308138c57d4a6ba0f565bd5b69a35a1cc451a3a034e1f3b14c42e0267e6211`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2795 bytes
`ole10native_00.bin` `ed56019e82a2755f3ffa14853769db4a78f2cd57161bddabfb79592eb3062d52`	ole-package	OLE Ole10Native stream: ObjectPool/_1690845027/Ole10Native	451375 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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