Malicious RTF — malware analysis report

Static analysis result for SHA-256 3b349444569a0ca5…

MALICIOUS

RTF

51.0 KB
MD5: 4056d1fbdc3eb5d4c036636e557bbdc5 SHA-1: 4070db5164d19b4a981d3ac3b16b92d8f08077da SHA-256: 3b349444569a0ca5703509aecdc60c55977c293e728b5f0ce595caa53721fe01
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 exploit allows for arbitrary code execution, indicating the file's primary purpose is to compromise the victim's system.

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
25e16d5deb7aee653b257bf42cc683ba0760ff4b02b0cb87f4115ca991150b92		 rtf-objdata-decoded RTF \objdata at offset 0x10B 3631 bytes

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