RTF malware analysis — malicious · e263a531a4190873

MALICIOUS

RTF

19.3 KB First seen: 2018-09-04

MD5: b2453024730a6b9ebac3877566ab49b5 SHA-1: 194d650eb7f9680fdf9d81062025cad56c16c04a SHA-256: e263a531a41908739be9652777fe599e44a807529493f3269109aa12e250fec4

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	4667 bytes
SHA-256: `876ffd9c87333c2da4953d7ea1b5e896de45d458b9114f14b6034051dc9e2784`

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