MALICIOUS
180
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The sample is an RTF document containing an embedded OLE object that leverages the Equation Editor vulnerability (CVE-2017-11882). The object's data is obfuscated and specifically crafted to trigger the exploit, leading to arbitrary code execution. No further stages or specific family indicators were identified.
Heuristics 5
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Obfuscated Equation Editor ProgID + activation critical RTF_EQUATION_EDITORRTF decodes to an Equation.3 ProgID from top-level \objdata hex after nested RTF junk groups are ignored, and the document also contains \objemb plus \objupdate activation. This is an obfuscated Equation Editor exploit surface associated with CVE-2017-11882 / CVE-2018-0802 families, but no exact malformed MTEF CVE primitive was recovered from this object.
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Equation Editor activation — CVE-2017-11882 related high CVE_2017_11882_ACTIVATION_RELATEDRTF decodes to an Equation.3 ProgID and requests OLE activation with \objemb plus \objupdate. This reaches the legacy Equation Editor attack surface used by CVE-2017-11882/CVE-2018-0802 documents, but the malformed MTEF/native payload needed for stronger attribution was not recovered.
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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
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off0000006e.binbd6bd417596b26fad0c1bc3e54773b1f0af60d8e30d678676b05e5b6241f4c5b |
rtf-objdata-decoded | RTF \objdata at offset 0x6E | 1943 bytes |
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