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

Static analysis result for SHA-256 415bfd899c283cd6…

MALICIOUS

Office (OLE) / .XLSX

1.67 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: b43f05b1133dfc0c3c2c5c6ef96e3abb SHA-1: 11652e68cab55c5942ef496311ee26f72650ad2e SHA-256: 415bfd899c283cd61adfb94b6e76dab0b1e04fa74257882d94f6a81209422c50
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.005 Visual Basic

The sample exploits CVE-2017-0199 via an OLE2Link object, which is a known method for remote code execution. The heuristic indicates that it attempts to load a remote URL, specifically 'https://salsita.link/yNaz1O?&dentist=imminent&thanks', suggesting it acts as a downloader for a second-stage payload. Although VBA macros were present, they contained no executable statements, indicating the exploit relies on the OLE vulnerability itself.

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.

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

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