MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment
T1204.002 Malicious File: User Execution: Malicious File
The sample is an RTF document that contains OLE object data and specifically triggers heuristics related to the Equation Editor vulnerability (CVE-2017-11882). The presence of \objupdate indicates that the embedded OLE object is designed to be activated automatically, leading to the execution of malicious code. This strongly suggests a spearphishing attachment designed to exploit this known vulnerability for initial code execution.
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 1 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off0000150e.bin61d2eaf214b8efd8e98d6453bfe6099dbe3b48c9f8fe01de903c34b5a8556ee0 |
rtf-objdata-decoded | RTF \objdata at offset 0x150E | 43668 bytes |
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