MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious File Execution
T1566 Phishing
T1059.001 PowerShell
The sample is an RTF document that contains an embedded OLE object, specifically targeting the Equation Editor vulnerability. The ".objupdate" directive indicates that the embedded object will be activated automatically upon opening the document. This is a common technique for exploiting vulnerabilities like CVE-2017-11882 to achieve arbitrary code execution, likely to download and run a secondary payload.
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 1 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00001352.bin2b7559574ff22d06b9382ba49a199d0116b872a2bd01f502cf4c73c3faa24524 |
rtf-objdata-decoded | RTF \objdata at offset 0x1352 | 1836 bytes |
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