Malicious RTF — malware analysis report

Static analysis result for SHA-256 b224db43ab2ae449…

MALICIOUS

RTF

102.9 KB
MD5: 183a314da6a1bf02b41082687b6a3811 SHA-1: 16a18c54df141916baaa16397a255dc1e9f80b2a SHA-256: b224db43ab2ae44990cb6f0822d6ddfb3c18ad6d13ffb2463b0801a30b425cf3
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file 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. The file is classified as malicious due to this exploit.

Heuristics 3

  • 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.
  • 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_off00000122.bin
9551bc487dcfaac01d0eb7377ddefd65f5cfe3598d2c08e94be56fb0c5f4d88e		 rtf-objdata-decoded RTF \objdata at offset 0x122 3629 bytes

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