MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Data Encrypted
T1204 User Execution
The presence of multiple high-severity heuristics related to RTF embedding techniques strongly suggests exploitation against known MS Equation Editor CVEs; specifically, offsets indicate split-byte obfuscated triggers alongside auto-linking/updating mechanisms typical only to these attacks.
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_off000000d3.bina85129b1cac5cdf5dd1a13bcb9d80282e13a4c5af926183a1e752c7314856526 |
rtf-objdata-decoded | RTF \objdata at offset 0xD3 | 2150 bytes |
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