MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious Link
T1059 Command and Scripting Interpreter
The RTF document contains an embedded OLE object with an Equation Editor ProgID, which is a known exploit vector. The ".objupdate" directive forces the activation of this object, triggering the exploit. The document also contains a lure instructing the user to 'Enable editing', a common tactic to bypass security measures and facilitate the execution of malicious code. The exploit likely leads to the download and execution of a second-stage payload.
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_off000046d0.binb51455c1fa512371a7760d61a5b0f1ac053edc3be50abaa48c1937fbb028e5e8 |
rtf-objdata-decoded | RTF \objdata at offset 0x46D0 | 1281 bytes |
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