Malicious RTF — malware analysis report

Static analysis result for SHA-256 a2c11e41b5aa0f1d…

MALICIOUS

RTF

5.6 KB First seen: 2017-12-24
MD5: 5603fec0ffa3a9f2d8a0853bb617e071 SHA-1: 3d5c904d088cc9489337c6c0bea49a7dbc0b2003 SHA-256: a2c11e41b5aa0f1da673dfc7d7a6deadd7e19ef8484dc409df987d0a5dfedfd8
222 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an OLE object that exploits CVE-2017-0199, a known vulnerability for remote code execution. The exploit targets the URL http://51.255.101.158/logo.doc to download and likely execute a secondary payload. This indicates a malicious document designed to compromise the user's system through an exploit.

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://51.255.101.158/logo.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: 88bbcb13d62080d44b63dbd3715f9ee5fa633e64f2a3fcbea32a1b5cab0b0bfd

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