Malicious Office (OLE) / .XLSX — malware analysis report

Static analysis result for SHA-256 3da8ae1deddeeb31…

MALICIOUS

Office (OLE) / .XLSX

1.43 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 09367ef54bc28e6261ad013d5ee046c1 SHA-1: 786e1e8d7a095589a4f42b48504aa7eebdd9fdd5 SHA-256: 3da8ae1deddeeb31358ef5b73b6b28ab502f8649116a345a8de21c014cd1c523
88 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 PowerShell

The critical heuristic firing for CVE-2017-0199 indicates that the sample is designed to exploit a vulnerability in OLE2Link and URL Moniker to load remote content. The embedded URL, 'https://greatthingsentiretimewithbestworkingskilliwthbetterperoformancegoodfor.business@wedew.link/Fb6fAC', is highly suspicious and likely serves as the source for a second-stage payload. While VBA macros were detected, they contained no executable statements, suggesting the exploit is directly leveraged by the OLE structure.

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.
    URL https://greatthingsentiretimewithbestworkingskilliwthbetterperoformancegoodfor.business@wedew.link/Fb6fAC
  • NOP-equivalent sled detected medium SC_NOP_EQUIV_SLED
    Long run of 0x61 bytes
  • 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.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes

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