Malicious RTF — malware analysis report

Static analysis result for SHA-256 97f43ed028f383c1…

MALICIOUS

RTF

95.9 KB
MD5: 732866315d4aacff060c2d49b2afca6b SHA-1: 0c97282ab2490b90826d1d7afb94614fc70db363 SHA-256: 97f43ed028f383c1ca20dffc281fbd560d3551cb984757713d6211bdee9a2012
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 Equation Editor vulnerability. This vulnerability is known to be used for arbitrary code execution, likely to download and run a secondary payload. No document body or scripts were extracted, but the critical heuristic firing strongly indicates exploitation.

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_off000023aa.bin
b85e2be5c3f956cb2969fa7c71e94b38c4dfc8137ac26dcb8a31dbe6e1cc60f1		 rtf-objdata-decoded RTF \objdata at offset 0x23AA 3631 bytes

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