MALICIOUS
240
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The RTF file contains embedded OLE object data, specifically triggering a critical heuristic for CVE-2017-11882 related to Microsoft Equation Editor. This indicates the file is designed to exploit this vulnerability for client-side code execution. The presence of ".objupdate" further suggests an attempt to force OLE activation. Given the nature of the exploit, it is highly likely to have been delivered as a spearphishing attachment.
Heuristics 5
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Equation Editor CLSID critical CVE likely 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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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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ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
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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 1 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off0000003b.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x3B | 4147 bytes |
SHA-256: cf4a05d5118c279604afd0e4b9d4d6431c5bf4ee0675d99ce4f38a91321e932f |
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