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

Static analysis result for SHA-256 057dee21a70fecbb…

MALICIOUS

Office (OLE) / .XLSX

645.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: edc3869ba8b78118979f05fbe9098b83 SHA-1: 3129170a970c1ba4fe05b5bbe4b88a1b5da03db8 SHA-256: 057dee21a70fecbb36618b33c27ad7c059c4ab99e0937e01fe398fb30af5bd98
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is a known vulnerability used to download and execute remote code. The embedded URL is the likely source of the secondary payload. No VBA macros were found to be executable, and the document body was not parsable.

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 https://gacorbos.me/cQUkVY?&seat=productive&frock=accurate&dugout=groovy&snowsuit

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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