MALICIOUS
142
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File
T1559.001 Component Object Model
T1059.003 Windows Command Shell
The RTF document contains embedded OLE objects, specifically triggering the CVE-2017-11882 vulnerability through an Equation Editor font record overflow. This exploit is designed to activate the OLE object, which in turn downloads and executes a payload from the URL http://79.134.225.85:89/uploads/putty1.exe. The presence of the exploit and the download URL strongly indicate a malicious intent to deliver a secondary payload.
Heuristics 5
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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 3 \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://79.134.225.85:89/uploads/putty1.exe
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off000000dc.bina7f55ebe22c7e0cf18446114d7041a847eca62f5d8835b1b4d8aec7ef28b1273 |
rtf-objdata-decoded | RTF \objdata at offset 0xDC | 16130 bytes |
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