Malicious RTF — malware analysis report

Static analysis result for SHA-256 a3c26e9ba8b8f1e9…

MALICIOUS

RTF

87.6 KB
MD5: b1b622b2a65cff283515a337d3becb32 SHA-1: 6385dfce95fc9430a756edd0db78a17334c3bb13 SHA-256: a3c26e9ba8b8f1e9281e29e964744ecc3842ee0d15a2c3356fde2f705591c748
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 upon opening the document. No further stages or specific family indicators were identified.

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_off0000239b.bin
f4d3f1c433602c5206687899faf40aecf8614be1ef22a6553a2f6554547e54cc		 rtf-objdata-decoded RTF \objdata at offset 0x239B 3631 bytes

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