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

Static analysis result for SHA-256 843cbb93468a6f06…

MALICIOUS

Office (OLE) / .XLS

1.21 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 77c8e53ce81f20d1536bd52fa7564165 SHA-1: 2d940a862f2adb89eab118d544d7bf363600461e SHA-256: 843cbb93468a6f06423a1453c6395f18899f314aab021cb33509b290daf625d3
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is used to download and execute a remote loader from the URL https://shuvi.io/KQxGCY. Although VBA macros are present, they do not contain executable statements, suggesting the exploit is directly leveraged by the OLE object rather than through macro execution. The presence of the URL and the CVE exploit strongly suggests a malicious intent to download and run a secondary payload.

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 https://shuvi.io/KQxGCY

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