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

Static analysis result for SHA-256 259cc7419dac2df2…

MALICIOUS

Office (OLE) / .XLSX

1.33 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: eb807e040b6ec080d50c5d52522bfeb6 SHA-1: 36dbf633b3f526eb67ec0d2a479e2b5b433c3df0 SHA-256: 259cc7419dac2df22a4f1493d5539370a01f16e7c845b57c99463f7dc57602da
68 Risk Score

Malware Insights

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

The critical heuristic firing for CVE-2017-0199 indicates the file is designed to exploit this vulnerability. The embedded URL is likely used to download and execute a second-stage payload. Although VBA macros were present, they contained no executable statements, suggesting the exploit is delivered via the OLE object itself.

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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