RTF malware analysis — malicious · d888f52fa8af74a1

MALICIOUS

RTF

526.7 KB First seen: 2019-05-16

MD5: 3495780b198aa1fab699f6513a6f387a SHA-1: 9f6b6f5cbeec854cba8aee4a6c62e4ffe214bb63 SHA-256: d888f52fa8af74a15d1422271cd73f4c905957f5ddcbc8092917f19fdd48e965

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF document contains OLE object data with an \objupdate directive, indicating an attempt to exploit OLE object activation for code execution. The presence of \objdata and \objupdate heuristics strongly suggests a client-side exploit targeting OLE object handling. No specific family could be identified, and no further IOCs were extracted.

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_off000012b3.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x12B3	9366 bytes
SHA-256: `0c53890a90c043bb31f8943b0340810e6168500c0e68f4a7a179d0f4fe403c71`

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