Malicious RTF — malware analysis report

Static analysis result for SHA-256 3e6a96f628adae40…

MALICIOUS

RTF

48.2 KB Created: 2018-05-26 10:13:00 First seen: 2019-01-12
MD5: a61a81e81cd990528f8e6aff6934d33e SHA-1: bb39f7cf6a89184d7734ae8e817f82813f514248 SHA-256: 3e6a96f628adae4024dfd8817dc11fd2d9c487b08515e65d8518110430020b75
182 Risk Score

Malware Insights

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

The RTF file contains an OLE object that exploits CVE-2017-0199, a known vulnerability for remote code execution. The exploit attempts to download a payload from the URL http://127.0.0.1/www.html, indicating a likely attack pattern of spearphishing attachment leading to remote code execution.

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.
  • 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.
  • 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://127.0.0.1/www.html 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_off00002cd3.bin rtf-objdata-decoded RTF \objdata at offset 0x2CD3 3202 bytes
SHA-256: 84ec11c544ada12ca2f793ee041bc52f83b480a119732be43df13999122325b9