Malicious RTF — malware analysis report

Static analysis result for SHA-256 c1023efe3c89145f…

MALICIOUS

RTF

5.2 KB First seen: 2017-11-20
MD5: 6761589cccae7bafd4d4abce035ee4e0 SHA-1: e4178d6be377d84124ec1966f9154e1835ddd587 SHA-256: c1023efe3c89145f5879801459bdbd0c254c11239436bd30f73845b3c0bdc43d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and is configured to automatically update and activate an OLE object. This is indicative of an exploit targeting CVE-2017-0199, which is known to weaponize URLs. The embedded URL http://bellasimpson.com/abc.hta is likely the target of this exploit, intended to download and execute a malicious HTA payload.

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/abc.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 2611 bytes
SHA-256: da7e621436481b1c9956fda5d81fc382a721878e122a1f6d367bd980b9554a23