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

Static analysis result for SHA-256 255bdeac42b3ac62…

MALICIOUS

Office (OLE) / .XLSX

1.09 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 88efb12a1ed0390341effbd2564f7a3c SHA-1: 101ab5419a340ead114f6add5be84a342b53582b SHA-256: 255bdeac42b3ac621fba54cc851d8686b6ccb54e170f87d698b3cbbe70342563
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 technique is used to download and execute a remote payload from the provided URL. The URL itself is suspicious due to its structure and domain. No VBA macros were found to be executable, but the exploit mechanism is clear.

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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