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

Static analysis result for SHA-256 2c4557c9b0b5f18c…

MALICIOUS

Office (OLE) / .DOC

430.5 KB Created: 2021-09-01 09:52:00 Authoring application: Microsoft Office Word
MD5: b4095bc22ff3f27dd088852a49338c08 SHA-1: fb5d1506454a79cc41086d65e6f72a4493185f3f SHA-256: 2c4557c9b0b5f18c6cffb810cbbb07601ae0b1b071658611523bf980d814d7b8
104 Risk Score

Malware Insights

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

The sample is a malicious DOC file containing a VBA macro that executes upon opening the document. The macro attempts to save a file named 'glib.doc' to the user's template directory. The script also appears to interact with registry keys related to VBA security settings, specifically 'HKCU\Software\Microsoft\Office\16.0\Word\Security\VBAWarnings', suggesting an attempt to bypass or manipulate security prompts. The overall intent is to download and save a second-stage 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
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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