RTF malware analysis — malicious · f55fff400c31c826

MALICIOUS

RTF

8.1 KB First seen: 2019-01-12

MD5: 955f0e811f23dfe0767d6486549ff2e8 SHA-1: 98ab0453b9b57ccb88e901360c3a886199c0b359 SHA-256: f55fff400c31c8265d5eed7c4a217d6fe6c8d1a4ce1c0539f7b0ddb508e764c7

180 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 exploit is known to allow for arbitrary code execution on vulnerable systems. The ClamAV detection further confirms the presence of this specific exploit.

Heuristics 4

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
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
\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_off0000003a.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3A	4136 bytes
SHA-256: `8e3a05f393c2ae6c4c417083d28a9af89479c69607dcbfcd6d0fe28c02f82f05`

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