Malicious RTF — malware analysis report

Static analysis result for SHA-256 8f8941682a160b52…

MALICIOUS

RTF

56.4 KB
MD5: 71c458b9f34d7a289f9fa636cf9f1e92 SHA-1: 4cf697c89967c754765d6056f4aa0bd1ed5ff76d SHA-256: 8f8941682a160b522ddee8b70d3306c6c2f1e2aa061f52c25fffe7224babbb33
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that leverages a known 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_off00000110.bin
ce5c6395c6e9c92be722ddfaaaa0589f734874bd1b0c060e4aa19afa89f4d0ae		 rtf-objdata-decoded RTF \objdata at offset 0x110 3631 bytes

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