Office (OLE) / .XLSX malware analysis — malicious · 279212a280629727

MALICIOUS

Office (OLE) / .XLSX

1.12 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: 221f228dfa20495a79346d343e9247dc SHA-1: 9cb6b9b2789a5a227c6561790ea353507713f98c SHA-256: 279212a280629727edeb1bab801d30116de12ed162400753638a7ec51523aa1b

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. This vulnerability is used to download a remote payload from the URL 'https://kryx.ru/RNF52o?&vestment=hard&firewall=tasteless&bread=rapid&beneficiary'. Although the VBA project contains no executable statements, the presence of the OLE vulnerability strongly suggests a remote code execution attempt.

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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