Malicious RTF — malware analysis report

Static analysis result for SHA-256 9eb0eced2b19aaee…

MALICIOUS

RTF

271.8 KB Created: 2021-02-12 04:30:00
MD5: 811e21035ffa36b8977341b9679be74b SHA-1: 232f6db29cf6e66a154cc68ec8d7c2856fc3f010 SHA-256: 9eb0eced2b19aaeea9e6884261b102bb9d8207555e44174729e2520aaf407469
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This exploit is known to facilitate arbitrary code execution, which is likely used here to download and run a secondary payload. The document body content appears to be a lure related to Afghan refugees, potentially to trick the user into opening the malicious attachment.

Heuristics 4

  • 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
  • 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://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001bc4.bin
0109f29ba73d8a06ba5b0763ff15e485d8a02093d47d8d94baa960f825669f10		 rtf-objdata-decoded RTF \objdata at offset 0x1BC4 3631 bytes

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