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

Static analysis result for SHA-256 7f61684b60eb3e94…

MALICIOUS

Office (OLE) / .XLSX

1.14 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 9c17cdbc104813b51701cef4006649cb SHA-1: 1180ba9773be69b65f2a414505a40e820c0312a5 SHA-256: 7f61684b60eb3e94dfb0e28acee9f4ac8c4b6f6d431c5716f2eb3b11bb609fcd
68 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 payload from the specified URL. Although the VBA project contains no executable statements, the critical heuristic firing directly indicates the exploit mechanism and the remote URL. The file is likely a downloader for a second-stage malicious payload.

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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