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

Static analysis result for SHA-256 beac155d8702e596…

MALICIOUS

Office (OLE) / .XLSX

1.24 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 4e6df23eabc8e189865730b19d2303f4 SHA-1: 1809c658ad744c8698ea070c5fcfc228d1c07520 SHA-256: beac155d8702e5964ab48cf2aa9b73b4b2c752dd9ee08253e10983889b18f417
68 Risk Score

Malware Insights

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

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE object, which attempts to download a remote payload from the provided URL. The VBA macros were present but contained no executable statements, suggesting they are not the primary infection vector. The extracted URL is the highest priority IOC.

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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