Malicious RTF — malware analysis report

Static analysis result for SHA-256 3f9c3d84a0948c73…

MALICIOUS

RTF

158.3 KB First seen: 2018-11-13
MD5: da01a518711526a6a98aa6010f034eee SHA-1: 3399d34cb3f74a97f1df3c740f0829860b950a42 SHA-256: 3f9c3d84a0948c7331680ae041ba4dc7fc731d1e696289df038a6bfad46dc104
122 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an OLE object that is configured to automatically update, triggering the exploitation of CVE-2017-0199. This exploit is used to download and execute a malicious HTA file from the URL https://securednetwork.se/uche/YHGTKFHKFHF.hta, indicating a likely initial access vector via spearphishing attachment.

Heuristics 4

  • 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.
  • \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 https://securednetwork.se/uche/YHGTKFHKFHF.hta In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000003c.bin rtf-objdata-decoded RTF \objdata at offset 0x3C 51753 bytes
SHA-256: 6ce98c326bc856389b469d75fcb4e81e3d75ea09b4e1bd5686ed4eecf3890b5e

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