RTF malware analysis — malicious · 77269bc4e17e0775

MALICIOUS

RTF

19.3 KB First seen: 2018-09-04

MD5: a5941ab5534c12110dd16b5e86d065f1 SHA-1: a7e4ac301c5c7985d161c8631912ec837fd3f42c SHA-256: 77269bc4e17e077511880717d165af44ed08ce679908464851bf2d669fdd3ea4

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	4658 bytes
SHA-256: `81a0abad18a9fa4a77fd558c051f6bb659708f959056ee792f96e109b29b2883`

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