MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
T1566.001 Spearphishing Attachment
The sample is an RTF document containing OLE object data and specifically triggers heuristics related to the Equation Editor vulnerability. This indicates the document is designed to exploit CVE-2017-11882, a known vulnerability allowing for arbitrary code execution when the embedded Equation Editor object is activated via \objupdate. The primary goal is likely to download and execute 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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\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
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00000e63.bin54f66f47a340a4cf87daecd6f1080fc201b51f69370c785d0ebac2728357a743 |
rtf-objdata-decoded | RTF \objdata at offset 0xE63 | 1897 bytes |
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