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

Static analysis result for SHA-256 90c9118bd68b6d45…

MALICIOUS

Office (OLE) / .DOC

328.0 KB Created: 2021-09-22 10:46:00
MD5: 2d494d83bef839234bbc2494159f1459 SHA-1: 47e59653ffa2793fdb727fcea033027d49470c59 SHA-256: 90c9118bd68b6d45f6a6b9b69889ce09f8e11e73b722334e606fc429db957140
104 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The sample contains a VBA macro that is triggered by the Document_Open event. This macro attempts to create a file named 'diplo.doc' in the user's template directory. The macro also attempts to modify registry keys related to VBA security settings, likely to bypass them. The presence of the Document_Open macro and the attempt to create a file in a user-specific directory suggest a malicious intent to execute further stages or establish persistence.

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
ab0a07553c2841a74e3ba9d7b1f5c48a5af800dda3fc2f0fa3c0d780a05dba11
vba-macro oletools.olevba.extract_macros (decoded VBA source) 3295 bytes
ole10native_00.bin
c2ed486a1563a41ad697f56b359c80c8a8dd2d64afef3662263f66543d24d880
ole-package OLE Ole10Native stream: ObjectPool/_1693787468/Ole10Native 160568 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.96, consistent with packed or encrypted content.