Office (OLE) / .XLSX malware analysis — malicious · a2f5f1083c12732f

MALICIOUS

Office (OLE) / .XLSX

219.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2024-07-31

MD5: 47adda4b98594bf295c4ada9eccb8884 SHA-1: 433d39936cfcccc0038d5ab4f5fa8e666d43529a SHA-256: a2f5f1083c12732fe1dfe5b39fe7c741e7ab167f4c414797b8227fd4d0429fef

70 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object pointing to a remote URL. This technique is commonly used to download and execute a second-stage payload. The embedded URL http://nx.ax/l4I is the primary indicator for this malicious activity.

Heuristics 3

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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://nx.ax/l4I

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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