Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 59829b460bf8c24e…

MALICIOUS

RTF / .DOC

1.52 MB Created: 2019-09-17 13:59:00
MD5: 30c2b17d12868ff1dcd3519e030a43ae SHA-1: b2454b095fb660eba7e0614250687a1063c85d34 SHA-256: 59829b460bf8c24e06dc9c0545b1541fafb20b52a101a21d841dba14051dd81d
200 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The RTF file contains embedded OLE objects and specifically triggers the Equation Editor vulnerability (CVE-2017-8759). This indicates the file is designed to exploit this known vulnerability for initial code execution. The presence of RTF_OBJDATA and RTF_OBJUPDATE heuristics further supports the exploitation of OLE object activation mechanisms. No scripts were extracted, and the document body was heavily obfuscated, preventing further analysis of the payload.

Heuristics 6

  • 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.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • \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://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00161f3a.bin
ec7327a6cb6913105e54255364f3971eb931c364c36005c0c138027919a6d129		 rtf-objdata-decoded RTF \objdata at offset 0x161F3A 3669 bytes

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