MALICIOUS
220
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The RTF file contains OLE object data and triggers critical heuristics for CVE-2017-8759 (SOAP Moniker RCE). ClamAV identifies the file as Rtf.Dropper.FormBook, indicating it's a dropper for the FormBook information-stealer. The embedded OLE object is likely responsible for executing the exploit and downloading the secondary payload.
Heuristics 5
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SOAP Moniker — CVE-2017-8759 (SOAP WSDL RCE) critical CVE_2017_8759RTF \objdata decodes to OLE data containing the SOAP Moniker — CVE-2017-8759 (SOAP WSDL RCE) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
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ClamAV: Rtf.Dropper.FormBook-6749871-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Rtf.Dropper.FormBook-6749871-0
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Automatically linked OLE object high RTF_OBJAUTLINKRTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
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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
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off0000003f.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x3F | 73447 bytes |
SHA-256: cb8541d388bb5260a993c1d2bf3a31a20112810f34d1a56eb3529a4227966687 |
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