Rtf.Dropper.Agent-7110172-0 — RTF malware analysis

Static analysis result for SHA-256 0b358ae747109b22…

MALICIOUS

RTF

261.2 KB Created: 2018-07-03 09:28:00 First seen: 2018-12-09
MD5: cee711ad2c0de9bcaa8e6a5c8cd0ff81 SHA-1: 666158f6093506c6f0976c89926301997c6f20fc SHA-256: 0b358ae747109b221f448dd248238d43b905d6ca246e22f7976ddf640a438977
262 Risk Score

Malware Insights

Rtf.Dropper.Agent-7110172-0 · confidence 95%

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

The RTF file contains embedded OLE objects and triggers critical heuristics for CVE-2017-11882 and CVE-2017-8759, indicating exploitation of vulnerabilities in Equation Editor and MSXML. The embedded URL suggests the file acts as a dropper for a second-stage payload, likely an MSI file, from the domain luckyfollowme.xyz.

Heuristics 7

  • CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882
    Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
  • CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759
    RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
  • ClamAV: Rtf.Dropper.Agent-7110172-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-7110172-0
  • \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 OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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://luckyfollowme.xyz/cgi/ewgxyk.msi In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000bf6b.bin rtf-objdata-decoded RTF \objdata at offset 0xBF6B 15672 bytes
SHA-256: 88a91b117f7454ca1d5a915a0026fed397f6d1f1aba4dd71c0e066f82629a9c4

Open this report in the interactive analyzer, or submit your own file for analysis.