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

Static analysis result for SHA-256 57f41289d5e30896…

MALICIOUS

Office (OLE) / .XLSX

174.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-10-25
MD5: 2e0802d18f6abb141be2cf26ed7bf231 SHA-1: b04a7966f6e7ba6e3c525b9157e7365eb273144d SHA-256: 57f41289d5e308965c3cada9e3452a5a64b2a7cb212c41e07e4311aa130b2118
70 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 Service Execution: Visual Basic

The critical heuristic firing for CVE_2017_0199 indicates that the sample is designed to exploit this vulnerability to download a remote document from the URL http://141.98.6.91/2150/1/HTMLCacheCentos.dOC. Although the VBA macros themselves do not contain executable statements, the presence of the OLE2Link object and the embedded URL strongly suggest a malicious intent to load and execute external content, likely a second-stage payload.

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://141.98.6.91/2150/1/HTMLCacheCentos.dOC

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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