MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
T1059.003 Windows Command Shell
The RTF file contains an embedded OLE object with a CLSID indicative of the Equation Editor. Heuristics confirm the presence of an OLE object and the use of \objupdate, strongly suggesting exploitation of CVE-2017-11882. This vulnerability allows for arbitrary code execution when the object is activated, likely leading to the download and execution of a second-stage payload. The SHA256 hash is included as an IOC.
Heuristics 5
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Equation Editor CLSID critical RTF_EQUATION_EDITOREquation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
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ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTIONClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
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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_off0000006a.binda1b46cee5811a2e80cdeb558e54e5161e140c07b566787267943e33f6220cd5 |
rtf-objdata-decoded | RTF \objdata at offset 0x6A | 4147 bytes |
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