Malicious RTF — malware analysis report

Static analysis result for SHA-256 95c4ead5d9f3e4b3…

MALICIOUS

RTF

53.5 KB
MD5: 19b8da910a84d704c1af94407e84f544 SHA-1: d6ab62d83354a00a43a2b1bba5cc4e859f58f47b SHA-256: 95c4ead5d9f3e4b3853cb04ccf5d8789b17cddf05354a7f5a521984134245b5b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers a critical 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 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_off0000010e.bin
4a4d1eeda015b3cf87dd477cca1e454680d1c22777f39975a6cf98324000aa62		 rtf-objdata-decoded RTF \objdata at offset 0x10E 3631 bytes

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