Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 dee554bdd169dd29…

MALICIOUS

RTF / .DOC

8.3 KB First seen: 2022-07-11
MD5: 33fb4faaa57de2cac1df1aaea43bf132 SHA-1: 8a4c34875ffb611ebae0a5566865b25e71b727ce SHA-256: dee554bdd169dd296526617a9e0db0be6ba64a6ad06a3f7ebf0f5b75625c769c
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.003 Windows Command Shell

The RTF document contains OLE object data and uses an \objupdate directive, indicating an attempt to exploit a vulnerability. This is a common technique for delivering malicious payloads, often via spearphishing attachments. The specific exploit is not immediately clear from the heuristics, but the overall pattern suggests a downloader or initial access mechanism.

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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000a48.bin
da2728c620c22e1bf52a8b6e1bc040efc9aea7ab91b3c42d4af308c7ffe78bc4
rtf-objdata-decoded RTF \objdata at offset 0xA48 1528 bytes