MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The RTF file contains an embedded OLE object that is configured to automatically activate and load a remote resource. This is indicative of exploitation for client execution, likely delivered via a spearphishing attachment. The specific vulnerabilities targeted are CVE-2017-0199 and CVE-2017-8759, which allow for the execution of arbitrary code by loading a remote moniker.
Heuristics 4
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CVE-2017-0199 / CVE-2017-8759 (OLE2Link auto-activated remote loader) critical RTF_OLE2LINK_REMOTE_MONIKER_LOADERRTF embeds an OLE2Link object that is force-activated with \objupdate (no user interaction on open) and fetches a remote second stage — through an INCLUDETEXT/INCLUDEPICTURE field or the OLE object's own moniker. This is the OLE2Link auto-update attack path shared by CVE-2017-0199 (server returns an HTA/scriptlet) and CVE-2017-8759 (server returns a SOAP WSDL the .NET parser compiles). Office processes the fetched response through the same code path; the specific CVE depends on the now-unreachable server content type.
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\objupdate forces OLE activation high RTF_OBJUPDATERTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
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OLE object data medium RTF_OBJDATARTF contains 1 \objdata section(s) — embedded OLE objects
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off0000003b.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x3B | 2605 bytes |
SHA-256: 3c4b31624b2dc083125702d0df9de32a5285dae6fb56fb2bedd8ecf165b19ff4 |
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