Malicious RTF — malware analysis report

Static analysis result for SHA-256 47db858ed606135c…

MALICIOUS

RTF

7.2 KB First seen: 2019-05-16
MD5: dde507f77bfcc4b805265b22693b4dfe SHA-1: 714373f7bec3efe64614968877f034e053092a7e SHA-256: 47db858ed606135caadbd86de971c084a6377480dc0ec312a46df257e33bbca2
222 Risk Score

Malware Insights

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

The RTF file contains OLE object data and is configured to automatically update and activate an OLE object. This is indicative of an exploit targeting CVE-2017-0199, which leverages remote URL monikers to download and execute a payload from a specified URL. The embedded URL http://192.168.12.143/exploit.html is likely the source of this payload.

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://192.168.12.143/exploit.html In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000744.bin rtf-objdata-decoded RTF \objdata at offset 0x744 2724 bytes
SHA-256: 6e5201b9aeaa61b33fd3f977ea68195b96a92fcb57aa49b1fa8e66b8b1df0d1f

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