MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious Link
T1204.002 Malicious Link: Malicious File
T1059 Command and Scripting Interpreter
T1059.005 Command and Scripting Interpreter: Visual Basic
T1566 Phishing
T1566.001 Phishing: Spearphishing Attachment
T1566.002 Phishing: Spearphishing Link
The sample is an RTF document that contains an embedded OLE object with a specific Equation Editor ProgID, indicating an attempt to exploit the Equation Editor vulnerability. The ".objupdate" directive forces OLE activation, and the document body contains a lure instructing the user to 'Enable editing'. This combination strongly suggests a malicious document designed to exploit the Equation Editor vulnerability to download and execute a secondary 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_off00003f58.bin75d37a7b4a13db1fc0974ce7c039cdcac94c76f1886558711dd339d17d6f38f4 |
rtf-objdata-decoded | RTF \objdata at offset 0x3F58 | 1388 bytes |
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