Malicious RTF — malware analysis report

Static analysis result for SHA-256 6be550b862b038b1…

MALICIOUS

RTF

55.6 KB
MD5: 80ef397c19c788002d916cbd0ec49a91 SHA-1: 4d876b517861fc4627012c7f0533b0b634789cc5 SHA-256: 6be550b862b038b1c1125d6c2ce61d72983cdd6fe5c9483e3624895d83ce1600
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 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_off00000109.bin
2b7436b1b28f777b2ad256aec767f9574966146a845c2cd72375c675c40263f4		 rtf-objdata-decoded RTF \objdata at offset 0x109 3631 bytes

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