RTF malware analysis — malicious · 75dea9484e46da31

MALICIOUS

RTF

8.2 KB First seen: 2019-04-17

MD5: 7eae6ba86424daf7e6aa41c51aafbcaa SHA-1: 5b8e0ac7aa646ded3c6bcb941cb42f15590e7fb4 SHA-256: 75dea9484e46da31b4afb241e2cd175e1309a97def7a1932917269dcec5f364a

220 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object that leverages the Equation Editor, a known vector for exploiting CVE-2017-11882. This exploit allows for arbitrary code execution, which is typically used to download and run a second-stage payload. The ClamAV detection name directly indicates the exploitation of this specific CVE.

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

ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\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_off0000003f.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3F	4152 bytes
SHA-256: `f4199f8956c91a7f2ed03cd7665121850177fb69dcccfe0c3020ead8f495cf1a`

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