Malicious RTF — malware analysis report

Static analysis result for SHA-256 8d6ebb634b3bab19…

MALICIOUS

RTF

74.5 KB
MD5: 8a45ab50e6b4539b4a7465a4510618e5 SHA-1: 9cc8afd2e8e013dbd589729f2412977bf0b9bb4b SHA-256: 8d6ebb634b3bab1910101c72a9e6dd4e74216cfbe9d85be750257e784d08de55
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers a buffer overflow vulnerability in the Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload.

Heuristics 3

  • 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.
  • 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_off000001e4.bin
b4a9a21244cad86557747c397db41c83022494aa31d09178fafc3b4dade1cac3		 rtf-objdata-decoded RTF \objdata at offset 0x1E4 3631 bytes

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