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

Static analysis result for SHA-256 91f6430dc185f375…

MALICIOUS

Office (OLE) / .DOC

38.0 KB Created: 2020-05-15 00:06:00 Authoring application: Microsoft Office Word
MD5: 160a1157100c3ae093ac0a28324476c2 SHA-1: 1eba2ec5442857a4cd45ebd3f203b4d67df57670 SHA-256: 91f6430dc185f375651f8a651f419a5755409f66ac6c404fe1ff839feff87c91
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1218.005 System Binary Proxy Execution: Mshta

The presence of VBA macros and a high-severity heuristic firing for 'SC_STR_CERTUTIL' indicates the sample attempts to use the certutil utility. This is commonly used to download and decode malicious payloads. The 'OLE_VBA_CREATEOBJ' heuristic further suggests dynamic execution capabilities within the macro. While no specific URLs were extracted, the use of certutil points to a downloader or dropper functionality.

Heuristics 5

  • Reference to certutil (download/decode) high SC_STR_CERTUTIL
    Reference to certutil (download/decode)
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • Suspicious extracted artifact high 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6e1393cd5502b7b7fb2974143b4c7b1bc3375a18f48d701a49aa6cc5be98a0b1
vba-macro oletools.olevba.extract_macros (decoded VBA source) 1725 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.