Rtf.Dropper.Agent-7702008-0 — RTF malware analysis

Static analysis result for SHA-256 d3946bc7b4727791…

MALICIOUS

RTF

134.0 KB Created: 2020-02-12 First seen: 2020-05-25
MD5: a29d55b914eda5c1ee64a0e132868b37 SHA-1: ebb3eabb83a50591c814db1b3acdd17ea8e284a9 SHA-256: d3946bc7b47277919ebc7c9526a376940a057c52a07c1b0411cba9e21b3ceed3
262 Risk Score

Malware Insights

Rtf.Dropper.Agent-7702008-0 · confidence 95%

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

The RTF file contains an embedded OLE object that is triggered for activation via \objupdate, exploiting CVE-2017-8759. Static triage indicates the presence of shellcode and a URL, suggesting the object's purpose is to download and execute a second-stage payload. The ClamAV detection name further supports this dropper functionality.

Heuristics 7

  • 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-7702008-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-7702008-0
  • Suspicious extracted artifact critical EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • \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.mic In RTF body
    • http://bit.ly/3307Q2LIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0001e1c0.bin rtf-objdata-decoded RTF \objdata at offset 0x1E1C0 1438 bytes
SHA-256: 00deeefc6e4bf74b7133c1a52e9dd62b4e92e64173f9de5bfef57222864bb830
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered URL(s): http://bit.ly/3307Q2L Static shellcode analysis found candidate code region(s). Indicators: SC_STR_LOADLIBRARY, SC_STR_URLDOWNLOAD, SC_PEB_ACCESS Static shellcode analysis recovered API/import strings: LoadLibraryA, GetProcAddress, URLDownloadToFileA, ExitProcess

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