Malicious RTF — malware analysis report

Static analysis result for SHA-256 a7ecdbe0391f17c7…

MALICIOUS

RTF

5.6 KB First seen: 2017-08-27
MD5: 007d6dfb4fab3338d906e47ad40eaaf5 SHA-1: 4ae399e07960f09a940d7c36e39149404eb8b9f8 SHA-256: a7ecdbe0391f17c770f4aa85397ec12e08a5ecf62c216b2d599387bb80ee7afa
222 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and is weaponized to exploit CVE-2017-0199. It automatically links to and updates an OLE object, which is configured to download a HTA file from the specified URL. This HTA payload is likely the next stage of the attack, designed to execute malicious code.

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://192.168.20.153:8080/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: 082f41236bc1d93cf0e77390cac1ce36fa5f213f43d8a02bbf6490cda1a2d4a7

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