MALICIOUS
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, which is used to download and execute a remote loader from the URL https://a38.fr/GQ1oBm. Although VBA macros were present, they contained no executable statements, suggesting the primary malicious functionality relies on the CVE exploit. The presence of the VBA project and the OLE structure points to a macro-enabled document, likely an Excel spreadsheet, used as the initial delivery vector.
Heuristics 3
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OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199Document 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.
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VBA project contains no executable statements low OLE_VBA_MACROSDocument contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
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Embedded URL info EMBEDDED_URLOne 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://a38.fr/GQ1oBm
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
macros.bas7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 1206 bytes |
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