Malicious RTF — malware analysis report

Static analysis result for SHA-256 340cbd06e0b3dd8d…

MALICIOUS

RTF

5.6 KB First seen: 2017-12-08
MD5: 1add9901e3ee39f2f9491872227422db SHA-1: 1e32dd00fc0d7f26ab125d8048d4344c4a1fe3cf SHA-256: 340cbd06e0b3dd8d9fd4e01caa28994511168d4ab8b75f34323ebe30b4442565
222 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 automatically link to and download a payload from the URL https://goo.gl/7Uuocw. This exploit is commonly used to deliver secondary malware stages, indicating a malicious intent to execute arbitrary code.

Heuristics 6

  • 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.
  • \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://schemas.microsoft.com/office/word/2003/wordml In RTF body
    • https://goo.gl/7UuocwIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000001ab.bin rtf-objdata-decoded RTF \objdata at offset 0x1AB 2601 bytes
SHA-256: 6ce43ee7bc973a2627082d0a3c093c8165b77439823dafd95dcd050c9047a77f

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