Malicious RTF — malware analysis report

Static analysis result for SHA-256 4da95ef6e49749b7…

MALICIOUS

RTF

17.6 KB First seen: 2023-02-21
MD5: bb305858814d868425bd5d85e202991b SHA-1: 4c152743525f39a16e56f9bd15e8a0924044355d SHA-256: 4da95ef6e49749b7b925c11ad25822791179a009f87ff46b3507322c0bff086a
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The RTF document contains embedded OLE objects, indicated by the RTF_OBJDATA and RTF_OLE10NATIVE_STREAM heuristics. The RTF_OBJUPDATE heuristic suggests that these embedded objects are designed to be activated, likely to execute a secondary payload. No document body or script content was available for further analysis, limiting the ability to determine the exact nature of the payload or its intended function.

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_off0000053a.bin
b1313d97843b829895ebbe2cf8cfb8dd9449fc8619c3d8c04d4cd8745b34f27f
rtf-objdata-decoded RTF \objdata at offset 0x53A 3659 bytes