MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File Execution: Malicious Attachment
T1059.003 Command and Scripting Interpreter: Windows Command Shell
The RTF document contains embedded OLE objects and specifically triggers the RTF_EQUATION_EDITOR heuristic, indicating the exploitation of a vulnerability within the Equation Editor component. The presence of RTF_OBJAUTLINK and RTF_OBJUPDATE further suggests that the embedded object is designed to be automatically activated upon opening, leading to arbitrary code execution. This is a common delivery mechanism for exploiting known vulnerabilities to download and execute further stages.
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_off00000de2.bincef7ad42c419229076eb51f75ad69e86e02e4a6fe7e1f9f17867723f23ac5438 |
rtf-objdata-decoded | RTF \objdata at offset 0xDE2 | 1414 bytes |
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