Rtf.Dropper.Agent-7384550-0 — RTF malware analysis

Static analysis result for SHA-256 e6c37c6d6ce40ca9…

MALICIOUS

RTF

75.9 KB First seen: 2018-10-07
MD5: 4de5adb865b5198b4f2593ad436fceff SHA-1: 787ed4f61a6e2d5e02783cdf4b27159962c80681 SHA-256: e6c37c6d6ce40ca9ffd4b0ad63d1399f11949fc28a2cf66282daa54645f24b4c
202 Risk Score

Malware Insights

Rtf.Dropper.Agent-7384550-0 · confidence 95%

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

The RTF file contains an embedded OLE object that is activated via \objupdate, exploiting CVE-2017-8759. This technique is commonly used by droppers to download and execute additional malware. ClamAV identified the sample as Rtf.Dropper.Agent-7384550-0, supporting its role as a dropper.

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.
  • ClamAV: Rtf.Trojan.Felixroot-6736095-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Trojan.Felixroot-6736095-0
  • \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://schemas.microsoft.com/office/word/2003/wordml In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000027fa.bin rtf-objdata-decoded RTF \objdata at offset 0x27FA 10640 bytes
SHA-256: 0291a306ea6957b49ba34e1761d8aad2bc200c41f08c5ae6cc790dda5e555e4c

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