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

Static analysis result for SHA-256 126d0d7df0f67282…

MALICIOUS

Office (OLE) / .DOC

356.0 KB Created: 2021-09-23 08:07:00
MD5: 47e5a0475df2c5edcc8eb64b42c9792d SHA-1: 8e58b9255f3b3e4ef61ac01a9018aea9026ed200 SHA-256: 126d0d7df0f67282cb1cf266e2216350892c7d56f37a90487e2f7cb8a97772bc
104 Risk Score

Malware Insights

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

The sample is a malicious OLE document containing VBA macros. The Document_Open macro is designed to execute upon opening the document. It appears to construct a path for a second-stage payload, potentially named 'diplo.doc', and attempts to download and execute it. The macro also attempts to establish persistence by writing to the Run key HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy.

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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