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

Static analysis result for SHA-256 198518a88af102a2…

MALICIOUS

Office (OLE) / .XLSX

1.16 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: be52cde70a3597e49788c0c697656ef6 SHA-1: 6543b17923ab0de95059e6b844bd6f629490080e SHA-256: 198518a88af102a22e2a33fce001289c500e664e4c5c60d72981683e18979e49
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is a known vulnerability used to download and execute remote payloads. The embedded URL points to a malicious domain, suggesting the file acts as a downloader for a second-stage exploit or malware. No VBA code was found to be executable, but the exploit itself is sufficient for execution.

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://goodthinsbetterjourneryforbetterthings.docx@l1k.ir/KFELrh

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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