Malicious RTF — malware analysis report

Static analysis result for SHA-256 4fd15ac85db04afe…

MALICIOUS

RTF

8.2 KB First seen: 2020-06-02
MD5: 7faa1c77565e53d24b4e979b0ed24ab9 SHA-1: 6058193b6e1d61a25488ada030622463a4d423ed SHA-256: 4fd15ac85db04afe65de6c55596989aac89f103dc0d08f34d9de97061550cb4f
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and specifically triggers heuristics for CVE-2017-11882, indicating exploitation of the Equation Editor vulnerability. This vulnerability allows for arbitrary code execution on the victim's machine. No document body or script content was available for further analysis.

Heuristics 4

  • Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • 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.
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000033.bin rtf-objdata-decoded RTF \objdata at offset 0x33 4144 bytes
SHA-256: 2d0e79b0b02ff6b34e093077273686e1ce434501d1bee305b81dedd8d4fb21ad

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