Malicious RTF — malware analysis report

Static analysis result for SHA-256 36efd074a6eb5611…

MALICIOUS

RTF

6.2 KB First seen: 2017-11-29
MD5: dce04627b2347c90a62a6d20e8127e16 SHA-1: c657eb3e8891d690cc73f49482659d8d636066d7 SHA-256: 36efd074a6eb56116ee92fe5bdbe0440aecc0e21f877d95fe7dfdad05259a9fb
162 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an OLE object that is automatically linked and updated, triggering an exploit for CVE-2017-0199. This exploit is designed to download and execute a secondary payload from the embedded URL http://bellasimpson.com/mtt.hta. The presence of the weaponized URL and OLE object activation heuristics strongly indicate this attack pattern.

Heuristics 5

  • 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.
  • 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://bellasimpson.com/mtt.hta In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000003f.bin rtf-objdata-decoded RTF \objdata at offset 0x3F 3135 bytes
SHA-256: c0a0195ae75d02e67be3b4083e22351dfa346940af6c5e61ffc702a7845acc40

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