Malicious RTF — malware analysis report

Static analysis result for SHA-256 0d249fe2e61f5b53…

MALICIOUS

RTF

6.2 KB First seen: 2017-12-24
MD5: eab729011b94d6e68ac1f4b82061eed5 SHA-1: c6fbef48a8da74c1f2d706d41a86d0741fcb33da SHA-256: 0d249fe2e61f5b53453e3d876c92c5b4f1b7550293144bc3cadea40eae65326d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an OLE object that is automatically linked and updated, exploiting CVE-2017-0199. This vulnerability is used to fetch and execute a secondary payload from the URL http://www.al-enayah.com/ssfm/jona.hta. The embedded OLE object data suggests an attempt to disguise malicious content within the RTF structure.

Heuristics 5

  • CVE-2017-0199 (OLE2Link / weaponized URL) critical CVE exact CVE_2017_0199_WEAPONIZED_URL
    RTF contains a URL Moniker OLE link to a script/HTA/template-style remote loader, matching the tighter static CVE-2017-0199 shape.
  • 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.
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • 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://www.al-enayah.com/ssfm/jona.hta In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000003f.bin rtf-objdata-decoded RTF \objdata at offset 0x3F 3131 bytes
SHA-256: bb04b430bc2ab407b581b221291c0ed4ec1ddab13c9e21038ef6de9871a0b21b

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