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
The sample is an RTF document that exploits the CVE-2017-11882 vulnerability in the Equation Editor. The document body contains a lure instructing the user to enable editing and content, a common tactic for macro-based malware. The presence of ` tf_objdata` and ` tf_objupdate` heuristics further indicates the embedding and activation of OLE objects, which is characteristic of this exploit.
Heuristics 4
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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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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_off000016d4.binc3f439d9a863d8d548b15aa72f1939f8a61b8438d1f094d8812032a3bbe67f67 |
rtf-objdata-decoded | RTF \objdata at offset 0x16D4 | 3637 bytes |
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