Malicious RTF — malware analysis report

Static analysis result for SHA-256 e22025acf1011388…

MALICIOUS

RTF

86.5 KB
MD5: 9de0c52fdb73f1e9056eb111dae6269e SHA-1: 9c56c80361dc7dade6e8651f66706d1ea0f84cf2 SHA-256: e22025acf101138844b7aff2f10f4beb43ed272ce7e4e02f194da0cd7549a279
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a buffer overflow vulnerability in the Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. The specific exploit details suggest a critical vulnerability was leveraged for initial execution.

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_off0000237d.bin
5c64d214fe0dfa2218efc7cf997c7fe76bf1ad40faf3b933d727fc69b703f937		 rtf-objdata-decoded RTF \objdata at offset 0x237D 3631 bytes

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