Malicious RTF — malware analysis report

Static analysis result for SHA-256 38a7e7ff46925371…

MALICIOUS

RTF

1.30 MB Created: 2019-04-16 11:26:00 First seen: 2020-07-24
MD5: e357623d1afc047c1918550fc12f53e1 SHA-1: 7331b69af184a55ef002487cdafcfe7b408b300e SHA-256: 38a7e7ff4692537127100742d620e58f5cd84631688636cc9e097f05287bd211
82 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file contains an RTF document that exploits the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution, likely to download and run a second-stage payload from the unknown URL http://myfreeshopping.in/engine1/normalinvoice.msi.

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 URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://myfreeshopping.in/engine1/normalinvoice.msi In RTF body
    • http://schemas.microsoft.com/office/word/2In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000f9bf6.bin rtf-objdata-decoded RTF \objdata at offset 0xF9BF6 15672 bytes
SHA-256: 2df586a7283a895a8cf698a81062a0ac93094e64e0d71bde41fcfd659d425f07

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