MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The critical heuristic firing for CVE-2017-11882 indicates a known vulnerability in Microsoft Equation Editor is being exploited. The presence of OLE object data and the \objupdate directive further suggest that embedded objects are being activated to trigger this exploit. This technique is commonly used to gain initial execution for delivering further malicious content.
Heuristics 3
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CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
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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_off000012c3.bin07fb6a9d77e0aa57c4ccfe01ee8b74f55fd3a44d1ca77e3e718eecfc293b57be |
rtf-objdata-decoded | RTF \objdata at offset 0x12C3 | 4159 bytes |
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