Malicious RTF — malware analysis report

Static analysis result for SHA-256 b770a17facb00105…

MALICIOUS

RTF

2.1 KB First seen: 2019-11-20
MD5: 1a82bad03b4e6ae9b02eb36966f88c6a SHA-1: 6d4f834983c983ef47a95d315c884723a46cbe33 SHA-256: b770a17facb00105dc860cdf0d59de8eda9fcf7482f3c67f13f23b1a1f01d5ae
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 that is triggered via \objupdate, indicating an attempt to exploit a vulnerability for client execution. The presence of OLE object data and the \objupdate heuristic strongly suggest this attack vector. Without further script or body content, the specific payload and family remain unknown.

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_off00000083.bin rtf-objdata-decoded RTF \objdata at offset 0x83 932 bytes
SHA-256: 32d56e540041be5076900f367f692de6c5a6ce166b48a51ba742bfe7b0ef5616

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