Malicious RTF — malware analysis report

Static analysis result for SHA-256 4a20e513143e9527…

MALICIOUS

RTF

80.0 KB
MD5: 4cfbf7244733eed16ea50f6348bd90c3 SHA-1: 6300f69c28cc41a66162ab55f30a177bd294852a SHA-256: 4a20e513143e952791fb1e9f34a6a8e98812d4971a708e6f8bb5c08ca26fdb78
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that exploits the CVE-2017-11882 vulnerability in the Equation Editor. This vulnerability allows for arbitrary code execution when the document is opened, likely to download and run a second-stage payload.

Heuristics 4

  • CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882
    Equation 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.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000235f.bin
e69471ad65612e9f2ceb3510cbe7188e30897751f2707d80de448f28ee4d3a72		 rtf-objdata-decoded RTF \objdata at offset 0x235F 3631 bytes

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