RTF malware analysis — malicious · 8b813fdb65963ed8

MALICIOUS

RTF

19.3 KB First seen: 2018-09-04

MD5: baa9c3e866aafad4546286b78870bc40 SHA-1: 1d4ce34cd01ef92ebc3ed6c377718bfa82d8ae80 SHA-256: 8b813fdb65963ed81cec9450a2482d49127aa78e6736a4b544faa16cb36549bf

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is an RTF document containing OLE object data and an \objupdate directive, indicating an attempt to exploit OLE activation for code execution. The presence of these elements strongly suggests a spearphishing attachment used to deliver a malicious payload. No specific family could be identified from the available evidence.

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_off00001676.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1676	4649 bytes
SHA-256: `4734d2898b6b50d8e0c7a4775f3b771791e93bf6f450a56a0ff833230ee809a8`

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