Malicious RTF — malware analysis report

Static analysis result for SHA-256 1a5a07321fe90100…

MALICIOUS

RTF

3.4 KB First seen: 2020-02-04
MD5: c975c0b28ccde74124e2f08bda6834ac SHA-1: 80e54e8e9f2d849eabbbde588b2180989bca64de SHA-256: 1a5a07321fe90100d4152cd44a9136e7444c6bef1c087e14ebecc945b356e4af
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains OLE object data and an \objupdate directive, indicating it is designed to exploit a vulnerability upon opening. This mechanism allows for arbitrary code execution, likely to download and run a secondary payload. The document body consists of repetitive numerical strings, offering no contextual clues about the lure.

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_off0000006d.bin rtf-objdata-decoded RTF \objdata at offset 0x6D 1675 bytes
SHA-256: 2031e91bf0d68464a8a2298f3252b26fdb7fe4371d3385098ba57f47a3eadded

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