RTF malware analysis — malicious · 917c41ce5cd885ff

MALICIOUS

RTF

9.2 KB First seen: 2018-06-14

MD5: 38280a5370ff99ceb763e0179fa881ab SHA-1: bbb46e5fc1f168c9c7ab4e10d09e52a0ddd00038 SHA-256: 917c41ce5cd885ffd5aaeef0057ce6e48cbb3a3fa2433782f6e6bfa90a1f1882

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 exploit allows for the execution of arbitrary code, likely to download and run a secondary payload. The ClamAV detection further confirms the presence of this known exploit.

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	4663 bytes
SHA-256: `4719616bf7f09795c96a0c072f2c9490bcfdd9a74df24fe8e0ca13ee13be9a0c`

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