MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The sample is an RTF document that contains an embedded OLE object, specifically targeting the Equation Editor. Heuristics indicate that \objupdate forces OLE activation, which is a known method for exploiting vulnerabilities like CVE-2017-11882. This exploitation likely leads to the execution of a secondary payload, although the specific payload and its origin could not be determined from the provided evidence.
Heuristics 3
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Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITORRTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
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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_off00000ac9.bin96dd2c27db2048fc81b0481490fb7e7edb07cbea14acaf1245fa789c86b60428 |
rtf-objdata-decoded | RTF \objdata at offset 0xAC9 | 2104 bytes |
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