MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 User Execution: Malicious File
The sample is an RTF document that exploits the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This is indicated by the critical heuristic firing for CVE_2017_11882 and the presence of OLE object data. The exploit likely allows for the execution of arbitrary code, enabling the delivery of a secondary malicious payload. The document body is heavily obfuscated and does not provide clear textual lures.
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_off00001734.binec5f0614c11bc79e3c37bed9c043ee2e175b6be4fc635bcc69edb33e9282bfa0 |
rtf-objdata-decoded | RTF \objdata at offset 0x1734 | 3643 bytes |
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