Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 201d3a5c3ddb27aa…

MALICIOUS

RTF / .DOC

28.6 KB First seen: 2022-07-11
MD5: 2b852a0d5c80da12ab76efe9c514d11a SHA-1: 0d0c6c1dadaac3fb9c24b482ec49642a78471ebc SHA-256: 201d3a5c3ddb27aa0197773fb0e6db33bc9007858a704753c18dacd0a8928cba
100 Risk Score

Malware Insights

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

The RTF document contains OLE object data and uses \objupdate to force OLE activation, indicating an attempt to exploit a vulnerability. The presence of the Ole10Native stream further supports this, suggesting the embedded OLE object is malicious and likely designed to execute code. This points towards a malicious attachment used for initial compromise, potentially to download further stages.

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_off00001ba3.bin
d950ce19c5b70571d5ad0417fdfe6dca6d892daf49fe912c2a47063510eba1b7
rtf-objdata-decoded RTF \objdata at offset 0x1BA3 4778 bytes