Office (OLE) / .XLS malware analysis — malicious · 3f4d5fe2b6f66d5e

MALICIOUS

Office (OLE) / .XLS

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

MD5: 8a9d62671157e1019b364ff4c969706e SHA-1: 9dff7f9264546e79420636d938b6f3b82459751e SHA-256: 3f4d5fe2b6f66d5e93571f72468cddbc9924d3b2d0d7d68a9b21ce8956a63964

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 file is an OLE2Link object that exploits CVE-2017-0199 to download a remote payload from the URL 'https://n9x.co/8vJn55'. The VBA project contains macros, but they do not appear to contain executable statements, suggesting the exploit is directly leveraged by the OLE object itself. The primary goal is to fetch and execute a secondary stage.

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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