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

Static analysis result for SHA-256 4d3a6e2f2413f569…

MALICIOUS

Office (OLE) / .XLS

603.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d6597ff9e34d6e0237878a3e2d7fc7ae SHA-1: 0b1bf0ff2215b47e33be2590b9deeff1472b0c03 SHA-256: 4d3a6e2f2413f569ce9971b049c0567c6ebe546670a615526b6c4eff7e26795f
70 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 Service Execution: Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to download and execute a remote payload from the specified URL. Although the VBA project contains no executable statements, the OLE vulnerability itself is sufficient for initial compromise. The sample is an Excel spreadsheet, further supporting its role as a delivery mechanism.

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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