Malicious RTF — malware analysis report

Static analysis result for SHA-256 77142f6c92581935…

MALICIOUS

RTF

55.8 KB
MD5: 1b0b713fd4a0b943c516253eaa5fc92b SHA-1: 0e4efe79f6b68ab307a8ae85dfc5abceccd8e1de SHA-256: 77142f6c92581935d14ab3180f4af1618f8eae0007c69662d07d82f4207653cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that exploits the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution when the object is processed, likely leading to the download and execution of 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_off00000110.bin
4353638defa0b48b8c35182a69fe8cfff621bbd21f9c2d1dde017edbd11a81f6		 rtf-objdata-decoded RTF \objdata at offset 0x110 3631 bytes

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