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

Static analysis result for SHA-256 f6e107b35a4adaa9…

MALICIOUS

Office (OLE) / .XLSX

1.55 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 9b9c11c4ea751c2f3e5abbb8ff5a1dc4 SHA-1: 0a4b0853fd3d2af724ec0d93a11f59639f038ca0 SHA-256: f6e107b35a4adaa91c2779f23b1a0d00c5ae655663ecf378061e12b164000b71
70 Risk Score

Malware Insights

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

The sample is an OLE file that exploits CVE-2017-0199 via a URL moniker. This technique is used to download and execute a remote loader from the URL 'https://salsita.link/yNaz1O?&playroom'. Although the VBA project contains no executable statements, the OLE structure itself facilitates the exploit. The file is classified as malicious due to this exploit.

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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