Malicious RTF — malware analysis report

Static analysis result for SHA-256 a6442d8a86c1e310…

MALICIOUS

RTF

53.9 KB
MD5: 6026b9ea4e39b982a5bb50c1c914badb SHA-1: 5249673a3be041ca0a21f5cbf8c02282f1057de6 SHA-256: a6442d8a86c1e3102628a119027c49310906fd2fc6762224dc58889166a5f4ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 Equation Editor vulnerability. This vulnerability allows for arbitrary code execution by exploiting a font record overflow within the Equation Editor component. The exploit is likely used to download and execute 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_off0000010d.bin
38f755cd9cd1d48da5b4a81bdfd65ee0df863a5e03215c5f7b3bcd721e51150e		 rtf-objdata-decoded RTF \objdata at offset 0x10D 3631 bytes

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