Malicious RTF — malware analysis report

Static analysis result for SHA-256 69fd48035b530325…

MALICIOUS

RTF

5.6 KB First seen: 2018-01-08
MD5: f311c1d067c3fd120c76785ce193510c SHA-1: 8a45e0517832650a6aabcdc6c3b21b6cdbe1b2d3 SHA-256: 69fd48035b530325e5a077a9e727740abe6d09a5864b4bba3ca0ec23b58f3927
222 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 and updated, exploiting CVE-2017-0199. This vulnerability allows the file to download a secondary payload, 'raykoo.doc', from the specified IP address. The presence of the OLE object and the specific CVE exploit indicate a malicious intent to execute remote code.

Heuristics 6

  • 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.
  • ClamAV: Rtf.Exploit.CVE_2017_0199-6335035-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_0199-6335035-0
  • 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://10.0.2.15/raykoo.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_off000001a2.bin rtf-objdata-decoded RTF \objdata at offset 0x1A2 2601 bytes
SHA-256: 6db8dea4ad154ca2ef58c891463cb2b09f16aee29ff62fa2239a47ca9b4cb3da

Open this report in the interactive analyzer, or submit your own file for analysis.