MALICIOUS
121
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1059.001 PowerShell
The sample is an RTF document that contains embedded OLE objects and triggers an objupdate event, indicating an attempt to activate embedded content. Critical heuristic firings for RTF_EQUATION_EDITOR and RTF_OBJDATA strongly suggest exploitation of the Equation Editor vulnerability. This technique is commonly used to achieve arbitrary code execution, typically for downloading and executing a second-stage payload.
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 2 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00001d32.bin3e1c0eebbaf9b4b283338f0e8d888f08247f0c2249251b15a89db70c6ce1855c |
rtf-objdata-decoded | RTF \objdata at offset 0x1D32 | 1428 bytes |
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