Office (OLE) / .XLSX malware analysis — malicious · 463f9d0fe68d2fee

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 719f8b4c31bd2141169b3bf6dfaaddce SHA-1: cd922a33c4b6e1723ccf92cb62d4640f7fe809e4 SHA-256: 463f9d0fe68d2feee312744c7326ca8a71d60de04d2caacbfb5a5a24652e9a3a

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing indicates the exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to load remote content. The extracted URL, https://ichika.tw/yhaSw9, is highly suspicious and likely serves as the source for a second-stage payload. Although the VBA macros themselves contain no executable statements, the presence of the OLE vulnerability and the external URL strongly suggest a remote code execution and download attack pattern.

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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