RTF malware analysis — malicious · f11ee6222bc510e8

MALICIOUS

RTF

22.7 KB First seen: 2022-04-24

MD5: f4aada82e9e4f66b015b4de0765cfac4 SHA-1: 6540a96c84b2e7c931c843c92958782607a6bf81 SHA-256: f11ee6222bc510e8ccb2b73c44180915c013ec2af37bfa34825d8a82df48a7d9

121 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The RTF file contains OLE object data and uses \objupdate to force OLE activation, indicating an attempt to exploit embedded objects. The Ole10Native stream further confirms the presence of a decoded OLE object. While no specific script was extracted, the heuristics strongly suggest the file is designed to trigger malicious code execution via OLE object manipulation, likely as a lure for further payload delivery.

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.

Filename	Kind	Source	Size
`objdata_00_off00001e56.bin` `6fbb6f60cb37b4024053c895c84159c7c1373c5312ae00107b15f53f1abcd27a`	rtf-objdata-decoded	RTF \objdata at offset 0x1E56	3685 bytes

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