Malicious RTF — malware analysis report

Static analysis result for SHA-256 5971735f4ff3221d…

MALICIOUS

RTF

55.9 KB
MD5: c4ef7798e5b85767d17a28e3386f3d44 SHA-1: 8101c997447656242dc03cc07bf4d5d91c4376fa SHA-256: 5971735f4ff3221d66d70d95f0a5a8a25b6bf2a9e695a30759dce2989f8f7788
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that leverages the CVE-2017-11882 vulnerability in Equation Editor. This vulnerability allows for the execution of arbitrary code upon opening the document, 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_off0000010d.bin
6e60674cb2519fc5d433adc8f9a388295ca1d71b14f33396ee87eb8b869609ef		 rtf-objdata-decoded RTF \objdata at offset 0x10D 3631 bytes

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