Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 f77b2e4e85ca38c3…

MALICIOUS

RTF / .DOC

4.0 KB First seen: 2022-12-13
MD5: 804f2e653c2baef8283a07217bed14f7 SHA-1: ff3f9bdbcb9e2d654d68b8615774efae87dd8fc8 SHA-256: f77b2e4e85ca38c31f0e7abac4e32a52c79bdbb53653a7cf7d9cfe9008f17ee6
60 Risk Score

Malware Insights

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

The RTF document contains embedded OLE object data, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this object is designed to be activated automatically, likely exploiting a vulnerability in older versions of Microsoft Office. The specific nature of the exploit is not detailed, but the presence of OLE object data points towards a malicious document designed to execute arbitrary code upon opening.

Heuristics 2

  • \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_off0000006f.bin
05531dd9116633325534f0f78501f7188743a2ec2f521e2061bc2a7599168cef
rtf-objdata-decoded RTF \objdata at offset 0x6F 1930 bytes