Malicious RTF — malware analysis report

Static analysis result for SHA-256 3e87a757301ee0cc…

MALICIOUS

RTF

128.0 KB Created: 2017-11-15 12:40:00 First seen: 2017-11-20
MD5: 2c6505b230d803239ce66f39ad71a51a SHA-1: 8fbc9a54239cb36a269f008c4cc8aeb15a971327 SHA-256: 3e87a757301ee0ccf71747fc7e8288850cd7ed85b4ebaf8442b55958397360be
122 Risk Score

Malware Insights

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

The RTF file contains an OLE object that is automatically linked to a remote URL, triggering CVE-2017-0199. This vulnerability is used to download and execute a secondary payload from the specified URL. The file's primary function appears to be the exploitation of this vulnerability to achieve remote code execution.

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 https://void.cat/60e40c4f3b7c03d91f7742e67075b649b983dd76 In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000026dd.bin rtf-objdata-decoded RTF \objdata at offset 0x26DD 3640 bytes
SHA-256: 2880155a7b0b13cd1b70b283532ce0fd3ea4086bfe9e8f53372674e71f98fec6

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