MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
The RTF file contains an embedded OLE object that leverages the Equation Editor vulnerability. The ".objupdate" directive indicates that the OLE object is designed to be activated automatically, which is a common technique for exploiting this vulnerability. This exploit likely leads to the execution of a second-stage payload, although no specific payload or download URL was extracted from this sample.
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_off00000044.bin9d4bfc438c0078949962b93957ea5d8bc81667dc8aa58151ca149e6dbff1fbe0 |
rtf-objdata-decoded | RTF \objdata at offset 0x44 | 2093 bytes |
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