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

Static analysis result for SHA-256 f333559e3330d8e3…

MALICIOUS

Office (OLE) / .XLS

470.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-08-09
MD5: e56afe64811c57ecc95c1dbacebfc8b7 SHA-1: 8438bb7cf165ca11904453c4c45f101c9d9abfad SHA-256: f333559e3330d8e3451bba09b27642589788d99ae3093e8822fa241703d6fd2a
70 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 PowerShell T1071.001 Web Protocols

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which attempts to download a remote DOC file from the provided URL. The embedded URL is the primary indicator of compromise. No VBA macros were found to be executable, suggesting the exploit relies solely on the OLE vulnerability.

Heuristics 3

  • OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199
    Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • 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://194.195.118.93/RTT/000000000000000%23%23%23%23%23%23%23%23%23%23%23%23%23%230000000000%23%23%23%23%23%23%23%23%23%23%23%23%23%2300000000000%23%23%23%23%23%23%23%230.DOC

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes

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