Malicious RTF — malware analysis report

Static analysis result for SHA-256 d0ed83081e63fbe3…

MALICIOUS

RTF

56.1 KB
MD5: 386878ccde10c30a77ca6829db2f648c SHA-1: a666e83c42bb068504e4f71c7a7d109d5ece453d SHA-256: d0ed83081e63fbe3f9b5c32c4a99f3c62928b51201c6dad1d8c53df459f56a70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that leverages a known 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. No document body or scripts were extracted, but the critical heuristics strongly indicate exploitation.

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
eb57339e4d36c86ae4d57c71a25bb9ca57fc754655348180e9a8ca60d412ce0d		 rtf-objdata-decoded RTF \objdata at offset 0x10E 3631 bytes

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