RTF malware analysis — malicious · 7c8c50a112ccaaa5

MALICIOUS

RTF

9.2 KB First seen: 2018-08-26

MD5: e9e34d34e12da74c95474f13758c5f72 SHA-1: de516051c55404c5b989922fb30545f9f906fc17 SHA-256: 7c8c50a112ccaaa537357281ea2b2a40d13564ac1ac202d81ec32098cee601ff

220 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object with data indicative of the Equation Editor vulnerability (CVE-2017-11882). The presence of RTF_EQUATION_EDITOR and RTF_OBJUPDATE heuristics strongly suggests exploitation of this known vulnerability. This technique allows for arbitrary code execution on the victim's machine.

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_off0000003b.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3B	4667 bytes
SHA-256: `898ae51012835ffb08fdc6a8cced73e882728e14e7915df80bcd42558ae25deb`

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