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

Static analysis result for SHA-256 faf054ba01ad73d9…

MALICIOUS

Office (OLE) / .XLSX

1.03 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: ba36f5ffab402e83d7a3d430f10f5241 SHA-1: 12a218b983179231bb5a9f3a37b09a72f36d3975 SHA-256: faf054ba01ad73d9e2645a2159fb0159cc87f0473cb1966c8066d0b224342de9
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: User Execution of Malicious File T1059.005 Command and Scripting Interpreter: Visual Basic

The sample leverages the CVE-2017-0199 vulnerability, which is a known method for remote code execution. The heuristic firing indicates that the file attempts to load a remote resource via a URL moniker. This technique is commonly used to download and execute a second-stage payload. No VBA macros were found to be executable, but the core exploit is present.

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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