Malicious RTF — malware analysis report

Static analysis result for SHA-256 2c647e945ae019be…

MALICIOUS

RTF

6.2 KB First seen: 2019-06-27
MD5: cb3f632da4035dc68b9526a7274b1cf1 SHA-1: c425f600a08824b4a5813a072833e2dfb832f80b SHA-256: 2c647e945ae019becb470a1c133c74dda9244e4f9480a84cf4f8c119aadf899e
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, exploiting CVE-2017-0199. This exploit is designed to download and execute a second-stage payload from the embedded URL http://tlljl.com/ii/xl.hta. The presence of the weaponized URL and the OLE object activation heuristics strongly indicate a malicious intent to execute arbitrary code.

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://tlljl.com/ii/xl.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 3130 bytes
SHA-256: ac2471e29bead36d433fa0c16ef889a5dfa0994b9969189a35fda49361cccc35

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