Malicious RTF — malware analysis report

Static analysis result for SHA-256 0f67ca388c43a74f…

MALICIOUS

RTF

175.4 KB First seen: 2021-09-15
MD5: 2a9d71061be6d1d961d238b4fc97042c SHA-1: 74e0834859a151d9ae384541b432ffd44336f7b2 SHA-256: 0f67ca388c43a74f9bec7f585934f1b2278779ccdb2019471956d3f65729b0f5
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a critical heuristic for CVE-2017-11882, a known vulnerability in Microsoft Equation Editor. This exploit allows for arbitrary code execution on the target system. No further IOCs were extracted from this sample.

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_off00000055.bin rtf-objdata-decoded RTF \objdata at offset 0x55 3627 bytes
SHA-256: 5d2fede66a017b7e77d76299a823e2b47f173ae66ea06cc9778b34ad018bbb50

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