Malicious RTF — malware analysis report

Static analysis result for SHA-256 758a793ab55bffb1…

MALICIOUS

RTF

56.7 KB
MD5: 9704e567efc9918c3ef6271da1f0f040 SHA-1: 7b7afe4ce26da644b3923837f5efd91331f0abbd SHA-256: 758a793ab55bffb193134d1adfd6e180d8c9507d7293a2a4284af1de4d46723a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file 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 document is opened, 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_off00000104.bin
ab72b3c3f7c462abbe013c02dfe16b20aec457a5b81b28148e3893b884ffeb03		 rtf-objdata-decoded RTF \objdata at offset 0x104 3631 bytes

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