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

Static analysis result for SHA-256 4dd5a23497bc1255…

MALICIOUS

Office (OLE) / .XLS

1.02 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: c89f5a1d497b708a0567fb1744e09768 SHA-1: ae39ceb5c9f8111a4d7665e73de88cdaa77ac0a0 SHA-256: 4dd5a23497bc12559d50aa4031bdc6582f5f794f9d93daa1f3b1d36f28784c5b
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 PowerShell T1059.001 PowerShell T1059.003 Windows Command Shell

The sample is an OLE file that exploits CVE-2017-0199 via a URL moniker to download a remote loader. The heuristic explicitly identifies the vulnerability and the embedded URL. No VBA macros were found to be executable, but the core exploit mechanism is clear.

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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