Malicious RTF — malware analysis report

Static analysis result for SHA-256 c708711ac2f8109b…

MALICIOUS

RTF

44.5 KB Created: 2017-11-14 13:32:00 First seen: 2017-11-20
MD5: c36f05658c826fc909ffdda019151191 SHA-1: ece630594bc1a21822fd7fdccb0ed4b53d516a4f SHA-256: c708711ac2f8109bbb05fc2490bdebfc17ef0cefcf710b6090741a8d2cf3417b
142 Risk Score

Malware Insights

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

The RTF document contains an OLE object that leverages CVE-2017-0199 to automatically link to and download a secondary file from 'http://185.24.233.19/2/jud.doc'. The document also contains a lure to enable editing, indicating it is designed to bypass security measures and execute a payload. The specific malware family could not be determined from the available evidence.

Heuristics 5

  • 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://185.24.233.19/2/jud.doc 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_off0000341b.bin rtf-objdata-decoded RTF \objdata at offset 0x341B 3640 bytes
SHA-256: 22470d32c58c47f4ada80d34732dd6756800b6cc777cfe02de6e9535ccfb7960