Malicious RTF — malware analysis report

Static analysis result for SHA-256 6fddc3d2d9eb4ab6…

MALICIOUS

RTF

45.0 KB Created: 2017-10-11 17:24:00 First seen: 2017-11-20
MD5: 908f8e43a5b6b1c576d3cac6c632f588 SHA-1: 2bd55ecf661a973c0ab522086363a4fdd31bb01e SHA-256: 6fddc3d2d9eb4ab64becd9aba2c5c25b4d92bae8c13f99141e41cca008c570e0
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. This vulnerability allows the file to automatically download and execute a second-stage RTF document from the specified URL. The embedded URL points to a potentially malicious resource that likely serves the next stage of the attack.

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://192.168.153.142/1.rtf 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_off0000385a.bin rtf-objdata-decoded RTF \objdata at offset 0x385A 2601 bytes
SHA-256: 6f4745ec0b70a860086ea094135be4d719b0ee91a5740f56e96c1ac1de5226e7

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