Malicious RTF — malware analysis report

Static analysis result for SHA-256 98a147e95a35ef2d…

MALICIOUS

RTF

3.5 KB First seen: 2020-09-07
MD5: 278ea63f7eb521ad35759195c1eb392c SHA-1: 21a5603f226789329f369fe90cc7b6d25374f0e5 SHA-256: 98a147e95a35ef2d0253a7a1920bae37f91767b0a3fd3a416a66d3df69b0d059
60 Risk Score

Malware Insights

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

The RTF file contains an embedded OLE object, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this object is designed to be activated automatically, leading to the execution of arbitrary code. This is a common technique for exploiting vulnerabilities in document parsers to achieve initial code execution.

Heuristics 2

  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000127.bin rtf-objdata-decoded RTF \objdata at offset 0x127 1597 bytes
SHA-256: 513208a04098a7a3cd584c19f1d6ea4c32e3525e0b223a193222936ac38ec563

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