MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
T1059.003 Windows Command Shell
The file is an RTF document that contains embedded OLE objects, specifically targeting the Equation Editor vulnerability. The presence of ".objdata" and ".objautlink" sections, along with the critical RTF_EQUATION_EDITOR heuristic, strongly indicates exploitation of CVE-2017-11882. This vulnerability allows for arbitrary code execution upon opening the document, likely leading to the download and execution of a secondary payload.
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 2 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00000a7d.bin259621be161210f3cecf579a117155c33f78e0b8a21e2ed343000de64fb2ee3f |
rtf-objdata-decoded | RTF \objdata at offset 0xA7D | 1630 bytes |
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