MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File Execution: User Execution
T1059.001 PowerShell
T1204.001 Malicious File Execution: User Execution
The sample is an RTF document that contains embedded OLE objects, specifically triggering heuristics related to Equation Editor vulnerabilities. The presence of \objupdate suggests that the embedded object is designed to be activated automatically, leading to code execution. While no specific script was extracted, the heuristics strongly indicate exploitation of the Equation Editor vulnerability (CVE-2017-11882) to achieve arbitrary code execution, likely for downloading and executing a secondary payload.
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_off00000902.bin6831d8ef1b395ac15b6cc267f388a9865ecb10091c02d17c41cd826b2ecc1c14 |
rtf-objdata-decoded | RTF \objdata at offset 0x902 | 1811 bytes |
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