Malicious RTF — malware analysis report

Static analysis result for SHA-256 098b50d416469837…

MALICIOUS

RTF

293.1 KB First seen: 2020-05-14
MD5: e4262b7e2bd2e87c9d5b46e8e4cef7db SHA-1: 13c764b814e979a01bf270a5e86d9368fa7a72ba SHA-256: 098b50d4164698376ee91350624e9d7e00756892fda24a2b072ed176ae2ae8dc
180 Risk Score

Heuristics 4

  • Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • 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.
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000099.bin rtf-objdata-decoded RTF \objdata at offset 0x99 98315 bytes
SHA-256: ba2fb261a973a1255b018f3c1d0f51f0cfac9b5bb39f7ffc0ee7b7536b2214fb

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