Malicious RTF — malware analysis report

Static analysis result for SHA-256 5743a93d8a57888b…

MALICIOUS

RTF

53.7 KB
MD5: 7dfe880528c9a1f8e87ec9f59f041a8d SHA-1: bd1d67c9694a5a01a9d8d76b1e86f57d1dcd555d SHA-256: 5743a93d8a57888bea1b6d3a7b65158cfc3ebb50c43bfe1b18e5372f58ee7244
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers a critical vulnerability in the Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code on the victim's machine. No further stages or specific family indicators were identified.

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_off0000010f.bin
1724afbab2d27562daaf0a96b0b524b583fb94886743e8c742f40a0732bd51c5		 rtf-objdata-decoded RTF \objdata at offset 0x10F 3631 bytes

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