MALICIOUS
122
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The sample is an RTF document containing OLE objects, with heuristics indicating the use of ` tfobjdata`, ` tfobjemb`, ` tfobjupdate`, and `Composite Moniker`. These point to an exploit targeting OLE object handling to achieve code execution. The embedded URL was confirmed benign, and no scripts were extracted, suggesting the exploit itself is the primary mechanism for payload delivery. The lack of specific indicators prevents family attribution.
Heuristics 5
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Composite Moniker in RTF OLE object high RTF_COMPOSITE_MONIKER_RELATEDRTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
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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
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL http://schemas.microsoft.com/office/word/2{
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off0020ebe7.bin6d0b1d7c1f779b5ffb99b62e0c1232aa9134ccad2f50119d5b91691818f43a4a |
rtf-objdata-decoded | RTF \objdata at offset 0x20EBE7 | 1435 bytes |
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