MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1068 Exploitation for Privilege Escalation
The sample is an RTF document containing a critical heuristic firing for RTF_EQUATION_EDITOR, indicating a split hex Equation Editor ProgID and OLE object. This is characteristic of the CVE-2017-11882 exploit. The presence of RTF_OBJUPDATE and RTF_OBJDATA further supports a mechanism to force OLE activation and deliver a payload via embedded objects.
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_off00001a63.bin8d88468b932a0f5a2d618282f477058dcbc3df32a5b222bb49f55e606b34ecc7 |
rtf-objdata-decoded | RTF \objdata at offset 0x1A63 | 110983 bytes |
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