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

Static analysis result for SHA-256 cc90a2bd7fcacc78…

MALICIOUS

Office (OLE) / .XLS

307.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2024-05-28
MD5: b88bbc239676958a8066807a2705fe5a SHA-1: b58f1b4a83d0cebca98c7f9694de76ab0fc53989 SHA-256: cc90a2bd7fcacc78bd4d14c8574567d3a54ef4aea27575423426c6befd5ecc2c
70 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter T1059.005 Visual Basic

The sample is an OLE2Link file that exploits CVE-2017-0199, a known vulnerability for remote code execution. It attempts to download a secondary payload from the URL http://z2.ink/nZ3W. Although the VBA macros themselves do not contain executable statements, the file structure and heuristic firings strongly indicate a malicious intent to download and execute arbitrary code.

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://z2.ink/nZ3W

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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