MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1059.005 Service Execution: Visual Basic
The sample is an RTF document containing an embedded OLE object that exploits a known vulnerability in Microsoft Equation Editor. The presence of \objupdate indicates an attempt to force OLE activation, and the SE_ENABLE_LURE heuristic suggests the document prompts the user to enable content. This combination strongly indicates a malicious document designed to exploit the Equation Editor vulnerability for initial execution, likely leading to a secondary payload download.
Heuristics 5
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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
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off000044ea.bin9e6216b74e6aef2c8607d8849d1a5e604f04c932f801eebfe456f646a70be1bb |
rtf-objdata-decoded | RTF \objdata at offset 0x44EA | 1270 bytes |
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