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

Static analysis result for SHA-256 31ee3dd568d028ff…

MALICIOUS

Office (OLE) / .XLS

1.07 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 44149e44b5f3806e0ca0e382b8db04b2 SHA-1: 64e371a9867eb03b2fd56c5f6eb2e20556ab1f8b SHA-256: 31ee3dd568d028ffb8f65cd1178fb82d9f20252dbef7e8bd9112bc29910fec42
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 PowerShell T1204 User Execution

The critical heuristic firing indicates the exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to download and execute a remote payload from the URL http://nw.ax/l0P. Although the VBA project contains no executable statements, the presence of the OLE vulnerability is sufficient to classify this as a malicious document attempting to load external content.

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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