Malicious RTF — malware analysis report

Static analysis result for SHA-256 2ee3f4bb3bbd11c9…

MALICIOUS

RTF

111.9 KB First seen: 2021-09-15
MD5: 26238226837ddcf8e7122ed2264499f2 SHA-1: bb32a3bfd0b3f6a8fa00c4a37b13ad992c945c8f SHA-256: 2ee3f4bb3bbd11c975c37cec125804b6718958b8a3f413a2ae4ddff81ca4bb61
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. 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_off000000b1.bin rtf-objdata-decoded RTF \objdata at offset 0xB1 3627 bytes
SHA-256: 5d2fede66a017b7e77d76299a823e2b47f173ae66ea06cc9778b34ad018bbb50

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