Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 7b0de2532b96ff0f…

MALICIOUS

RTF / .DOC

120.6 KB First seen: 2022-03-29
MD5: dc3a51aff947f48a0abed64d7b6e2509 SHA-1: 6d7285c2a902103edc3fab427d11efc0551f368e SHA-256: 7b0de2532b96ff0f42c04e48d7515c4dbc8356f74443acd4a94d185d9a9702ce
153 Risk Score

Malware Insights

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

The RTF document contains OLE objects that are automatically linked and updated, indicating an attempt to exploit OLE activation mechanisms. The presence of embedded OLE object data suggests the document is designed to deliver and execute a secondary payload. While no specific script was extracted, the heuristic firings strongly suggest a malicious OLE object is embedded within the document.

Heuristics 3

  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • \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_off00001928.bin
1551a78212332224b7a43ffb48908a61339e6f5af3e4fe4aa67363efb33edb7b
rtf-objdata-decoded RTF \objdata at offset 0x1928 34784 bytes