Malicious RTF — malware analysis report

Static analysis result for SHA-256 9e9f12d14bd6918e…

MALICIOUS

RTF

268.0 KB Created: 2019-12-08 22:24:00
MD5: 174339ee0b1d50af956d16c7608a787e SHA-1: 70f7dda70f239b16afcd1e7818075237c53abbc5 SHA-256: 9e9f12d14bd6918e39116f6a1c8017ecf3cd93a37c760b67175c0332d429526e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.003 Windows Command Shell

The RTF document contains an OLE object that triggers the CVE-2017-11882 Equation Editor vulnerability. This exploit is likely used to download and execute a secondary payload from the URL http://bppgov.ng/gotv.exe. The embedded OLE object is a strong indicator of malicious intent.

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://bppgov.ng/gotv.exe
    • http://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000087a2.bin
b0c34a17576e3297c33b6199363827bfff6d995e5bf6bcbf9ed200970908e29c		 rtf-objdata-decoded RTF \objdata at offset 0x87A2 15879 bytes

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