MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment
T1204.002 Malicious Link: Malicious File
The sample is an RTF document that leverages the Equation Editor vulnerability, indicated by critical heuristic firings like RTF_EQUATION_EDITOR. This vulnerability allows for the execution of embedded OLE objects, likely to download and run a secondary payload. The presence of RTF_OBJDATA, RTF_OBJAUTLINK, and RTF_OBJUPDATE further confirms the exploitation of OLE object handling within the RTF structure.
Heuristics 4
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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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Automatically linked OLE object high RTF_OBJAUTLINKRTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
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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_off0000070c.bind0eb4ccc8a422b7435915ae3be30b8e81fd33d9782ab0d23e6417950312e2987 |
rtf-objdata-decoded | RTF \objdata at offset 0x70C | 2296 bytes |
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