MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The sample is an RTF document that contains embedded OLE object data, specifically targeting the Equation Editor. The presence of RTF_EQUATION_EDITOR and RTF_OBJUPDATE heuristics indicates exploitation of a known vulnerability in the Equation Editor component to achieve code execution. The embedded OLE object data is the primary indicator of this attack vector. No scripts were extracted, and the document body was not sufficiently readable to determine a specific lure.
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_off000010c1.bin72f65e820bbb8efa517f83c19404a3d88dc05489ebf0d281218b439d718fe73d |
rtf-objdata-decoded | RTF \objdata at offset 0x10C1 | 1873 bytes |
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