MALICIOUS
160
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
The sample is an RTF document that exploits the CVE-2017-11882 vulnerability in the Microsoft Equation Editor. The document body contains a lure instructing the user to enable editing and content, a common tactic for macro-based malware. The exploitation of CVE-2017-11882 allows for arbitrary code execution, which is typically used to download and execute a second-stage payload.
Heuristics 5
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CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
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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
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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_off00001cb8.bindb1cb487eac4512f29033205610d7cf17db2c4ac2d4473e7e27ad2ce7e028f2a |
rtf-objdata-decoded | RTF \objdata at offset 0x1CB8 | 3135 bytes |
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