Malicious RTF — malware analysis report

Static analysis result for SHA-256 f327a3a98d929041…

MALICIOUS

RTF

18.1 KB First seen: 2018-06-25
MD5: 416c3fd5729f191a18e99ce6da0948c5 SHA-1: c355571271553c8ceebf4173e023bda308f01ce1 SHA-256: f327a3a98d9290418d3400a06225f9e461391f6277aa4fd0757b6cb8aa54dd1a
222 Risk Score

Malware Insights

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

The RTF document contains an OLE object that is automatically linked and updated, triggering CVE-2017-0199. This exploit is weaponized with a URL that points to a malicious HTA file, indicating the document's purpose is to download and execute a second-stage payload. The embedded URL is the primary indicator of compromise.

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://ddl2.data.hu/get/305745/11043092/Report8648.hta In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000000c4.bin rtf-objdata-decoded RTF \objdata at offset 0xC4 9147 bytes
SHA-256: f405a28501e2a4f46ceb07fbcd8203138ae3f6938593b9640ee27273408d6760

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