Malicious RTF — malware analysis report

Static analysis result for SHA-256 6f9d979204a97107…

MALICIOUS

RTF

155.9 KB
MD5: 6fd66355713f728660bf16cb52a93c87 SHA-1: 5188a38d7b285b5b37f89669d7f213bac9b484e5 SHA-256: 6f9d979204a971073f81fafe2d377e8240473a30f49ad6e002ee63e3c2df9824
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a buffer overflow vulnerability in Microsoft Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. No specific family could be identified from the available evidence.

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_off00002377.bin
04a25556612003c3588cb51e063f5adceb6afa1078713bd6ff48692a3d96e448		 rtf-objdata-decoded RTF \objdata at offset 0x2377 28445 bytes

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