MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 User Execution: Malicious File
T1059 Command and Scripting Interpreter
T1566.001 Phishing: Spearphishing Attachment
The sample is an RTF document containing a split hex Equation Editor exploit (CVE-2017-11882), which is a common delivery mechanism for malware. The document body contains a clear lure instructing the user to 'enable editing above to see the rest of the message', which is a common social engineering tactic. No scripts were extracted from the sample, but the OLE object activation is forced via the \objupdate flag.
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 2 \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_off00000be4.binfc67bcb6c3aa6b34a87fc58584586ab954aa9e2b276fc8bd37735cec0120562c |
rtf-objdata-decoded | RTF \objdata at offset 0xBE4 | 1980 bytes |
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