Malicious RTF — malware analysis report

Static analysis result for SHA-256 b4bfbb2e00fed54c…

MALICIOUS

RTF

214.5 KB First seen: 2021-09-15
MD5: 77b197be260f442c5ceb143b8bfeb415 SHA-1: 2bf3aaa6973e57b4fcd0e24e5b7fe191ed74923b SHA-256: b4bfbb2e00fed54cbdbbc4eceda933c587173c4c7e08fcab3de20a8997b957db
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for the execution of arbitrary code, indicating a malicious intent to compromise the user's system.

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_off00000047.bin rtf-objdata-decoded RTF \objdata at offset 0x47 3627 bytes
SHA-256: 5d2fede66a017b7e77d76299a823e2b47f173ae66ea06cc9778b34ad018bbb50

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