Malicious RTF — malware analysis report

Static analysis result for SHA-256 4e1a7b277a9ab2ec…

MALICIOUS

RTF

37.2 KB Created: 2017-09-24 23:35:00 First seen: 2017-10-10
MD5: 6a8a9a06ba51c859cccd401e14d03169 SHA-1: eda51696e09b8fb1b2ca0b6b40116a225a15cbaa SHA-256: 4e1a7b277a9ab2ec9032ec5fad0d3ca78318c815d1f478c45c36d85abc18b1fb
182 Risk Score

Malware Insights

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

The RTF file contains an OLE object that leverages CVE-2017-0199 to fetch a remote resource. The embedded URL points to a local IP address, suggesting a controlled environment or internal testing. This exploit is commonly used to download and execute a secondary payload, likely leading to further compromise.

Heuristics 5

  • CVE-2017-0199 (OLE2Link / remote URL Moniker) critical CVE likely CVE_2017_0199
    RTF contains a URL Moniker OLE link whose decoded target is remote. Office can fetch and process the response through the CVE-2017-0199 OLE2Link attack path, but the server-side content type is not proven statically.
  • 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.
  • 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://192.168.230.154:8080/exploit.txt In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002c0a.bin rtf-objdata-decoded RTF \objdata at offset 0x2C0A 2724 bytes
SHA-256: 84b2636668206bcf7fb4c4b0f1a9bacf8e560b1b437f0c9c4ed154a3a4ea72ae

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