MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File: User Execution
T1059.005 PowerShell
The sample is an RTF document that contains an embedded OLE object, specifically targeting the Equation Editor vulnerability. The document body provides a lure about financial auditing to encourage users to enable editing, which is a common technique for malware droppers. The presence of RTF_EQUATION_EDITOR strongly suggests exploitation of CVE-2017-11882.
Heuristics 5
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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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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
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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_off000076b6.bine0cab53211f452e389bd3cfa84809f573843629cbbede12c9beb0acb6e678ef8 |
rtf-objdata-decoded | RTF \objdata at offset 0x76B6 | 1747 bytes |
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