MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The sample is an RTF document containing an embedded OLE object that decodes to a PE file. Heuristics indicate the use of the Equation Editor vulnerability (".objdata" and ".objupdate" sections), which is a known method for exploiting client systems. The decoded payload is likely a secondary stage designed to execute malicious code.
Heuristics 3
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Decoded Equation Editor payload + PE critical RTF_EQUATION_EDITORRTF decodes to an Equation Editor ProgID adjacent to OLE activation and the same decoded object stream contains embedded PE bytes. This matches the Equation Editor exploit surface used by CVE-2017-11882 / CVE-2018-0802 documents, while requiring payload evidence to avoid flagging benign Equation references.
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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_off00000088.bin2743bbe693c0303b9d94fdac44ddecc08cae80510c156515e570fd247fcecef8 |
rtf-objdata-decoded | RTF \objdata at offset 0x88 | 1821 bytes |
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