Malicious RTF — malware analysis report

Static analysis result for SHA-256 a9b5ba1bc268093d…

MALICIOUS

RTF

86.8 KB
MD5: 8b3cedb891684bafb23b27ba1ffbdee2 SHA-1: da63b8bb8f702256e52799c1762a4f2b5e5417d2 SHA-256: a9b5ba1bc268093d6fd49ead3bf919570e1be30860e3598d8fe917a08dcab560
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers a known vulnerability, CVE-2017-11882, in Microsoft Equation Editor. This vulnerability allows for the execution of arbitrary code, indicating a likely exploit delivery mechanism. 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_off00002379.bin
4b1c482b0fcd14ac2bbc122b79ccfba9bd6c0459463f16320d27cd2ef4b3093e		 rtf-objdata-decoded RTF \objdata at offset 0x2379 3631 bytes

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