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

Static analysis result for SHA-256 38fb971b9b996908…

MALICIOUS

Office (OLE) / .XLS

1.01 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 8eb6fa19eca9c23388ccec3d98ab4ebe SHA-1: 9399ca48d145046bcded0fd0c382294f2cb12d6b SHA-256: 38fb971b9b9969081ed830b1c861b27dc4acdf65b7ae4c06b25c73ae125d15b9
68 Risk Score

Malware Insights

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

The sample is an OLE file that exploits CVE-2017-0199 via a URL moniker to load a remote payload. The heuristic explicitly identifies the vulnerability and the URL used for the download. No VBA macros were found to be executable, but the exploit itself is sufficient for initial compromise.

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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