Malicious RTF — malware analysis report

Static analysis result for SHA-256 bd8a6b336be09c5e…

MALICIOUS

RTF

155.5 KB
MD5: 2757c018e891dcf2ad119a2dac8534f1 SHA-1: 3ab614d7471986be276db394f736804e4c4e6556 SHA-256: bd8a6b336be09c5e6119cf8030192cfd9bb1e7e353d8d15278b37e290d46bdc8
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document that contains an embedded OLE object. Static analysis identified a critical heuristic indicating the presence of the CVE-2017-11882 vulnerability, which is a known exploit in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution when the document is opened.

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_off0000238f.bin
8af51b4fcacfc4b05ac3b3a947442933bd693fa56c2668b6d4f05361510af3b5		 rtf-objdata-decoded RTF \objdata at offset 0x238F 28445 bytes

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