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

Static analysis result for SHA-256 180afa4d2cafa9da…

MALICIOUS

Office (OLE) / .XLS

1.67 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 50d74d8126c192cf839684f2df9e9a60 SHA-1: 67a43fa71868287307d1e8d59931ee723412d3af SHA-256: 180afa4d2cafa9da1604017c1daaef6a143319e4f30d0a41ad62d468898f91cf
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 Visual Basic

The sample is an Excel file that leverages the CVE-2017-0199 vulnerability, which is designed to download and execute a remote loader. The embedded URL 'https://kut.rs/n3tpUK' is the primary indicator for the second-stage payload. Although the VBA macro itself contains no executable statements, the OLE structure and the critical heuristic firing strongly indicate exploitation.

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://kut.rs/n3tpUK

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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