Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 b91c06e39595ec79…

MALICIOUS

RTF / .DOC

18.1 KB First seen: 2022-08-24
MD5: ec8f27df0b7c26c0ea3fe75343a59884 SHA-1: 9ae8f1a3d6ffc2ebeb9ba521e16e4af2e499dca9 SHA-256: b91c06e39595ec79ecfbeb4504149d14eef4adb6ccd06ab702740de0528afee5
100 Risk Score

Malware Insights

MITRE ATT&CK
T1559 Component Object Model Hijacking T1559.001 PowerShell

The RTF file contains OLE object data and triggers OLE activation, indicating an attempt to exploit embedded objects. The heuristics strongly suggest a vulnerability related to OLE object handling within the RTF format. No document body or script content was available for further analysis, limiting the understanding of the specific payload.

Heuristics 3

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • \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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000004a8.bin
88db21bbe016017a80acb7a5f94b76fc17a710e84a667bef407f23e5e5990cd0
rtf-objdata-decoded RTF \objdata at offset 0x4A8 3799 bytes