MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment
T1204.001 Malicious Link: Malicious Link
The sample is an RTF document that contains embedded OLE objects and triggers an update action, strongly indicating the exploitation of the Equation Editor vulnerability (CVE-2017-11882). This vulnerability is commonly used to download and execute a second-stage payload. The presence of `RTF_OBJDATA`, `RTF_EQUATION_EDITOR`, and `RTF_OBJUPDATE` heuristics confirms this attack vector. No scripts were extracted, but the exploit itself is sufficient to establish the attack pattern.
Heuristics 3
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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
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off000019ce.binc641102c869ebd7784ef5b3b75283163c9eaf05db6da1c2a50de15f790881133 |
rtf-objdata-decoded | RTF \objdata at offset 0x19CE | 1790 bytes |
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