Malicious RTF — malware analysis report

Static analysis result for SHA-256 7dd159c70f72808e…

MALICIOUS

RTF

52.6 KB
MD5: 9c5a83524e44c64c318505fc1293486c SHA-1: 08b611e7b3ebd89725ae845f7235f7dc959cfd30 SHA-256: 7dd159c70f72808e575842e7f9c2adf204bdf0cb9c51aec8222f9d6737b2d597
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that exploits the Equation Editor vulnerability (CVE-2017-11882). This vulnerability allows for arbitrary code execution when the document is opened. The specific exploit details indicate a FONT record overflow within the Equation Editor object.

Heuristics 4

  • 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.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • 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_off0000010f.bin
aca8415b7a3025d54358922aec37de0c7854c7985ea9748da997b0dffb963572		 rtf-objdata-decoded RTF \objdata at offset 0x10F 3631 bytes

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