MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Phishing: Spearphishing Attachment
The sample is an RTF document that contains embedded OLE object data. Critical heuristic firings indicate the presence of the CVE-2017-11882 vulnerability, which is a known exploit targeting Microsoft Equation Editor. This exploit allows for arbitrary code execution when the document is opened. The RTF_OBJUPDATE heuristic further suggests that the embedded object is configured to activate automatically, facilitating the exploit.
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_off00001cb6.bin405c429aa942487d7f8b3c26497de2347585483a213d9cdc32c2d433cfe2cb03 |
rtf-objdata-decoded | RTF \objdata at offset 0x1CB6 | 4164 bytes |
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