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

Static analysis result for SHA-256 a4dbd8b113a79833…

MALICIOUS

Office (OLE) / .XLS

1.33 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 47934a4c7555820284262db669e47a8b SHA-1: 1bf190eec03ef90b569512146b8299287c7ab29c SHA-256: a4dbd8b113a79833123e2d84c00fa7bb30955036d1de2ef302dbea27713a4497
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.005 Visual Basic

The sample is an Excel file that exploits CVE-2017-0199 via a URL Moniker to download a remote loader. The embedded URL points to a suspicious domain and appears to be the primary mechanism for delivering the secondary payload. No VBA macros were found to contain executable statements, but the exploit itself is sufficient for initial compromise.

Heuristics 2

  • 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.

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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