Malicious RTF — malware analysis report

Static analysis result for SHA-256 c3ae4a8d3efd4549…

MALICIOUS

RTF

5.6 KB First seen: 2017-11-29
MD5: 3ce74a35ebca7995c4b00b4e3b89a067 SHA-1: 7cf55109093d4b81f844fe7cf214ccc4166c56e2 SHA-256: c3ae4a8d3efd45494331cb804756fc7aeff299cf0da5c6f59d0abcb6eeb08d49
222 Risk Score

Malware Insights

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

The RTF file contains embedded OLE object data and is weaponized to exploit CVE-2017-0199. This exploit is designed to automatically link to and update an OLE object, which in this case points to a remote HTA file. The embedded URL 'http://192.168.1.1:4444/default.hta' is highly suspicious and likely serves as the secondary payload. The ClamAV detection further confirms the malicious nature of the file.

Heuristics 6

  • CVE-2017-0199 (OLE2Link / weaponized URL) critical CVE exact CVE_2017_0199_WEAPONIZED_URL
    RTF contains a URL Moniker OLE link to a script/HTA/template-style remote loader, matching the tighter static CVE-2017-0199 shape.
  • 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://192.168.1.1:4444/default.hta 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_off000001b4.bin rtf-objdata-decoded RTF \objdata at offset 0x1B4 2601 bytes
SHA-256: 1042a36caced899feb10b5e5e3f34c54040240ce0a76c0b793f5ab5c683aeb80

Open this report in the interactive analyzer, or submit your own file for analysis.