Malicious RTF — malware analysis report

Static analysis result for SHA-256 a45e37671dee9838…

MALICIOUS

RTF

175.1 KB First seen: 2024-06-28
MD5: b0d399c7eee1ee84aa8e55b81a4ac56f SHA-1: 35cd951142cc97df3b88b184e1267f3ff318d6bf SHA-256: a45e37671dee983884ff411af564c547b8b9322e35b3c8129bb8eb66e6f91ef6
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains embedded OLE objects, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that these objects are designed to be automatically activated upon opening the document. This mechanism is commonly used to drop and execute a secondary payload, hence the high confidence in an initial payload delivery attack pattern. No specific family could be identified.

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 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000018bb.bin
b3c4c246135f51aba920f1c876a8537c1324412c7e9c419bb4659f316a44d500
rtf-objdata-decoded RTF \objdata at offset 0x18BB 4193 bytes