Malicious RTF — malware analysis report

Static analysis result for SHA-256 f71a5a3929cc3029…

MALICIOUS

RTF

45.0 KB Created: 2017-07-25 12:23:00 First seen: 2018-03-04
MD5: a97d1b7486bf7d7aa0132fe1c6cfef9f SHA-1: ca659c350acf09843cf756257793a7696e1968f0 SHA-256: f71a5a3929cc302940f5fa4e815442ba0b38be141e1eec075a3b30cecb8d8c27
122 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an OLE object that exploits CVE-2017-0199, using a remote URL moniker to fetch a payload from an FTP server. The embedded URL 'ftp://debian:1234@192.168.251.132/' is the primary indicator of compromise. The exploitation of this vulnerability allows for client-side execution of arbitrary code.

Heuristics 4

  • CVE-2017-0199 (OLE2Link / remote URL Moniker) critical CVE likely CVE_2017_0199
    RTF contains a URL Moniker OLE link whose decoded target is remote. Office can fetch and process the response through the CVE-2017-0199 OLE2Link attack path, but the server-side content type is not proven statically.
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • 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://schemas.microsoft.com/office/word/2003/wordml In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002b1b.bin rtf-objdata-decoded RTF \objdata at offset 0x2B1B 3202 bytes
SHA-256: 48e70831c7edd23306d5159a8a24c16e48e538a36231166e0152ab8668117866

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