MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1059.005 PowerShell
The sample is an RTF document containing OLE object data and specifically targets the Equation Editor vulnerability. The presence of \objupdate indicates an attempt to automatically activate the embedded object upon opening. The document body contains a lure to 'Enable editing', suggesting it's designed to trick users into allowing the exploit to run. The primary attack vector is likely exploitation of CVE-2017-11882 via the embedded Equation Editor object, leading to arbitrary code execution.
Heuristics 4
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Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITORRTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
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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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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00004201.bind7963799c7a766d447c0c933dfb55549a46040e17c1eb2b46692c5165da6ab7e |
rtf-objdata-decoded | RTF \objdata at offset 0x4201 | 1816 bytes |
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