MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
The sample is an RTF document that contains embedded OLE objects, specifically triggering the Equation Editor vulnerability. The ".objupdate" directive forces OLE activation, indicating an attempt to exploit this vulnerability. The presence of the Equation Editor CLSID is a strong indicator of this attack vector. No scripts were extracted, and the document body was heavily obfuscated, but the heuristics clearly point to an Equation Editor exploit.
Heuristics 4
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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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\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 2 \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_off00001d79.bin6e30a359e9ae3c28cabc2f649b2f18f15d854c5a62e3e8c0233e402f270f7de6 |
rtf-objdata-decoded | RTF \objdata at offset 0x1D79 | 4169 bytes |
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