Malicious RTF — malware analysis report

Static analysis result for SHA-256 085044bc29548915…

MALICIOUS

RTF

5.6 KB First seen: 2019-08-04
MD5: 12f6ec279ce7bd4095b18c7ee25220e3 SHA-1: 73eef95734e2de96da3666df5d145c43963edb60 SHA-256: 085044bc295489151e872f3d947521be343acf80e7a939fff5d92e3fe561355f
222 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and is configured to automatically update, exploiting CVE-2017-0199. This exploit is designed to download and execute a remote payload from the specified URL, which in this case is http://192.168.118.131:8083/shell.exe. The presence of the OLE2Link object and the objupdate directive strongly indicate an attempt to execute arbitrary code from a remote source.

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://192.168.118.131:8083/shell.exe 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: 25e5e0aeca5f9b463c7fd17ff4983457646d1b7ae05a57611f279dd92b3f85ca

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