Malicious RTF — malware analysis report

Static analysis result for SHA-256 74e2ad3d7bb8edf6…

MALICIOUS

RTF

106.0 KB First seen: 2021-09-15
MD5: 55fd4284ada11f1769db881e22c30541 SHA-1: 73afe669bbf34af2bea88fae8280eec28edba65e SHA-256: 74e2ad3d7bb8edf6841ef796b644436d96c7f70520edc9c3fcb2a075dbbcb6e0
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a buffer overflow vulnerability in Microsoft 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_off00000083.bin rtf-objdata-decoded RTF \objdata at offset 0x83 3627 bytes
SHA-256: 5d2fede66a017b7e77d76299a823e2b47f173ae66ea06cc9778b34ad018bbb50

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