MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1059.001 PowerShell
T1105 Ingress Tool Transfer
The sample is an RTF document containing an embedded OLE object with an Equation Editor CLSID, triggering critical heuristics for Equation Editor exploitation. The ".objupdate" directive indicates that the OLE object is designed to be activated automatically. This suggests the document is a lure designed to exploit the Equation Editor vulnerability (CVE-2017-11882) to achieve code execution, likely for downloading and running a secondary payload.
Heuristics 4
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Ole10Native stream in RTF OLE object high RTF_OLE10NATIVE_STREAMRTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
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Equation Editor CLSID critical 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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\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_off00000fc3.bin9e9df56e86eba7af13a3207763d3a00d2bceb182cc5b40b592dfe315ec7330be |
rtf-objdata-decoded | RTF \objdata at offset 0xFC3 | 3678 bytes |
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