Malicious RTF — malware analysis report

Static analysis result for SHA-256 7f2a499891a72b9f…

MALICIOUS

RTF

36.6 KB Created: 2016-11-27 22:42:00 First seen: 2019-03-10
MD5: 775390eeeff4d54b9c3941ef1f220c9f SHA-1: 3770051d8cb7df081b5409f2be3b8d6c916a2755 SHA-256: 7f2a499891a72b9f3b0923be0f9db490463639166b41a15fe3bf5387df660f1c
182 Risk Score

Malware Insights

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

The RTF file exploits CVE-2017-0199, a known vulnerability for remote code execution via OLE object linking. The embedded URL 'http://rottastics36w.net/template.doc' is highly suspicious and likely serves as a lure for a second-stage payload. The ClamAV detection as 'Doc.Dropper.Agent-6249686-0' further confirms its malicious nature as a dropper.

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: Doc.Dropper.Agent-6249686-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6249686-0
  • 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://rottastics36w.net/template.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_off00003178.bin rtf-objdata-decoded RTF \objdata at offset 0x3178 2724 bytes
SHA-256: a6cc612766fee984fa419069b663e5435cc280b0a5b740dd9290b227de3451a7

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