RTF malware analysis — malicious · b5f9f61a782b168c

MALICIOUS

RTF

24.6 KB First seen: 2023-01-20

MD5: c4fd7dee392f91d1c8b0a69c4bc9f234 SHA-1: 66977db3e3002bf2a75dbb188b69f8cfe113b652 SHA-256: b5f9f61a782b168cb0a6e9f917dee8531dd9d34b9cdaf329aaeaf41a84bcb84f

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1027 Obfuscated Files or Information

The RTF file contains embedded OLE objects, indicated by the RTF_OBJDATA and RTF_OLE10NATIVE_STREAM heuristics. The RTF_OBJUPDATE heuristic suggests that these embedded objects are designed to be activated automatically, which is a common technique for delivering malicious payloads. The presence of an embedded OLE object, specifically a decoded OLE object of 4177 bytes, is the primary indicator of malicious activity.

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 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001fc7.bin` `29f5867253ed1da7eaab65c683bb7306c7d32f39f83d179e9ed353f96c7fceb3`	rtf-objdata-decoded	RTF \objdata at offset 0x1FC7	4177 bytes

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