Malicious RTF — malware analysis report

Static analysis result for SHA-256 f39bb0ef24d0a83e…

MALICIOUS

RTF

80.7 KB
MD5: bc4d596a15da40b61cf4d4253bfd6e78 SHA-1: 3f4766d76230cdb10769a20a0d159d5ec0070da4 SHA-256: f39bb0ef24d0a83ef60c38a678862dee4f8ec8b8ddf3c99c872a78167a02ee3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Equation Editor. 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_off000023bd.bin
bf35a608c2af90dc24ef8bde329f760a6460a547af4ff6aa7fcc7e57d74fa266		 rtf-objdata-decoded RTF \objdata at offset 0x23BD 3631 bytes

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