RTF malware analysis — malicious · a68d4e2b47b07595

MALICIOUS

RTF

8.2 KB First seen: 2018-08-05

MD5: d785d89742b8dd7fd91aebf5b2cc9454 SHA-1: 0e00a2cb01f08a70c38ac48de1886c11eb5e7e42 SHA-256: a68d4e2b47b075956e0b0135e3ca48a92cccddfb6bc2e003e680a83dfb68e0b5

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, along with the ClamAV detection name, 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_off0000003c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C	4156 bytes
SHA-256: `9b04e55ebab332116e4a8e583923f81d6f524920b89b306bb5b1f2dbbfc6345f`

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