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

Static analysis result for SHA-256 66b268acec79cfc0…

MALICIOUS

Office (OLE) / .DOC

356.0 KB Created: 2021-09-23 08:07:00
MD5: e8e1dde40267664d096d602fcf1fb785 SHA-1: 1cf820dfe83d97bc179fbb6ba10bad0a4fdf50f3 SHA-256: 66b268acec79cfc0e2c6aa21dbd2e6c7c4c694817ba915eeda716ba06eb37b94
104 Risk Score

Malware Insights

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

The sample is a malicious OLE document containing a VBA macro that executes upon opening. The macro attempts to download and open a password-protected document, likely to deliver a secondary payload. The macro also attempts to modify the VBA warnings registry key to prevent future warnings.

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
8c0f3e2769b6b5ee2247e73c38977b325a288cca81275eb61e7d50a710ca8ae9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3401 bytes
ole10native_00.bin
479c5345725aec6bcdd519b5aa14cc6727cb6deb8232e1dea2b26b49fcb0456a		 ole-package OLE Ole10Native stream: ObjectPool/_1693864210/Ole10Native 172856 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.96, consistent with packed or encrypted content.

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