Office (OLE) / .XLSX malware analysis — malicious · 23de64b6047ba6aa

MALICIOUS

Office (OLE) / .XLSX

209.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: b25f2a3c4fa81a42c63fbaf7769114e3 SHA-1: 45d154ebb1123e03c8552e02537c49d6aa559e44 SHA-256: 23de64b6047ba6aac0c5617452f0f8d6c5607f0c0677b43743b4f443bb0d6654

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, a known vulnerability for remote code execution. The heuristic explicitly points to a URL that is likely used to download a secondary payload. Although the VBA project contains no executable statements, the OLE structure itself is sufficient to trigger the exploit. The file's purpose is to act as a loader for malicious content hosted at the provided URL.

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.

Filename	Kind	Source	Size
`macros.bas` `7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1206 bytes

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