Malicious RTF — malware analysis report

Static analysis result for SHA-256 1c564e766d581701…

MALICIOUS

RTF

49.9 KB
MD5: 4eef0dafad1dc79c35f833c3e55f672d SHA-1: 7d44d4128aa06c9bce647edd491b9e20208a8495 SHA-256: 1c564e766d5817015c9aff3f6d70e91f53901a7a2d6de574636a8437a3d30728
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers a critical 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.

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_off0000010b.bin
6855e19e5d1478d9143388f7217a9783c800e3c49dfd0b841d3e2271a48469c7		 rtf-objdata-decoded RTF \objdata at offset 0x10B 3631 bytes

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