Malicious RTF — malware analysis report

Static analysis result for SHA-256 efa701a6dbc720f2…

MALICIOUS

RTF

50.7 KB
MD5: bd64e85cac2d7a0825ef68845964aa9b SHA-1: 3e9b35479c5066d38fa47d596dec86d005a62b79 SHA-256: efa701a6dbc720f25aba470437f67865f7ffc32189b26c57f019d9d676310099
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document containing an embedded OLE object that exploits CVE-2017-11882 in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution, likely to download and run a second-stage 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_off00000109.bin
137184f1089ec1d4b2878206e7229d6251b8ae55cedd89ae2978d491bd574ea2		 rtf-objdata-decoded RTF \objdata at offset 0x109 3631 bytes

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