MALICIOUS
280
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1559.002 Component Object Model and Distributed Component Object Model
The sample is an RTF document containing embedded OLE objects, specifically triggering critical heuristics for Equation Editor vulnerabilities. The presence of RTF_EQUATION_EDITOR and CVE_2017_11882 firings strongly indicates exploitation of the Equation Editor vulnerability. This technique is commonly used to achieve arbitrary code execution on the victim's machine.
Heuristics 6
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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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Equation Editor CLSID critical RTF_EQUATION_EDITOREquation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
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ClamAV: Rtf.Exploit.CVE_2018_0802-6825822-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Rtf.Exploit.CVE_2018_0802-6825822-0
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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_off000000be.bin67f297bb7a5ffd50e2e3d6c3ddbc6afe4f20370625d348e3d132d74cd3ed3db4 |
rtf-objdata-decoded | RTF \objdata at offset 0xBE | 4165 bytes |
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