RTF malware analysis — malicious · a3a516497279cacc

MALICIOUS

RTF

8.2 KB First seen: 2018-08-26

MD5: 43a08ffe71a4c3a6f43785cca6991194 SHA-1: 38e28e5efcd99787aae196692dd31dd58a845bf3 SHA-256: a3a516497279cacc11139dd6b5ba7296d7a85c5ff52a7ab55e6bf815b12ec6e8

220 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and specifically triggers heuristics related to the Equation Editor vulnerability (CVE-2017-11882). This indicates the file is designed to exploit this vulnerability for client-side code execution. No document body text or scripts were extracted, but the critical heuristics strongly suggest the exploitation of CVE-2017-11882.

Heuristics 5

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
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.
ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
\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_off0000003c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C	4156 bytes
SHA-256: `0683409043655ca5cd1d79e04242930f33c5c966e441879fa67ab0b00229c6af`

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