MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The sample is an RTF document that contains embedded OLE objects, a common technique for exploiting vulnerabilities. Specifically, the 'CVE_2017_11882' heuristic firing indicates exploitation of the Equation Editor vulnerability. This vulnerability allows for arbitrary code execution, which is likely used to download and execute a secondary payload, hence the 'Exploitation for Client Execution' technique. The presence of OLE objects and the specific CVE points to a malicious document, likely delivered via spearphishing.
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_off00001b26.bin15b819a3c35e0790fda6ffc253b0998191239c1cb6250c7899a61e39cd087870 |
rtf-objdata-decoded | RTF \objdata at offset 0x1B26 | 4171 bytes |
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