MALICIOUS
220
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The RTF document contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This exploit allows for the execution of arbitrary code, which is typically used to download and execute a second-stage payload. The ClamAV detection name further confirms the exploit's presence.
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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ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
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Automatically linked OLE object high RTF_OBJAUTLINKRTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
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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_off00001fb7.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x1FB7 | 4650 bytes |
SHA-256: 355b4702b7253effdb8439b12a3b356b3ba3966e76482cb7a65bec25f95c9670 |
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