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

Static analysis result for SHA-256 5edaa6e90a011788…

MALICIOUS

Office (OLE) / .XLS

735.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 6a783a2e3e8aaca35516eb3d5dc66804 SHA-1: b25aa3710ec1a669f78b9f6903ae0e698f58fef5 SHA-256: 5edaa6e90a011788952a496bd39b94fc315a119a66c8573c9e362eba03383629
70 Risk Score

Malware Insights

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

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which attempts to load a remote resource from http://nw.ax/Tm2. The embedded VBA macro, while not containing executable statements itself, is often used in conjunction with such exploits to facilitate further stages of the attack. The primary goal appears to be the execution of a second-stage payload from the identified URL.

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://nw.ax/Tm2

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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