Malicious RTF — malware analysis report

Static analysis result for SHA-256 efc910d74a34f9c2…

MALICIOUS

RTF

86.4 KB
MD5: d39c6cc25fce6e5a3880a5a8da7917b0 SHA-1: 3fe39b5dafc8acc3f1e1945351ebfd1b1a4538a6 SHA-256: efc910d74a34f9c2d61bee97b00de14f1714f99618627204170034646d9cc3be
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document containing an embedded OLE object. Static analysis detected a critical heuristic indicating the presence of the CVE-2017-11882 vulnerability within the Equation Editor component. This vulnerability is known to be exploited for arbitrary code execution.

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_off00002306.bin
3e47b22957bab0fde956af8de4ef8cdc846f4639074e0cedd9babaf70c969491		 rtf-objdata-decoded RTF \objdata at offset 0x2306 3631 bytes

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