RTF malware analysis — malicious · 333e3112de5a397c

MALICIOUS

RTF

8.2 KB First seen: 2019-11-20

MD5: 634fdf42c778691bef6b57c7c29a0d55 SHA-1: d9636c24f8fc83b00bfd8f41f4b219c93663f940 SHA-256: 333e3112de5a397ce5df552ee145cebb4a2d74f41187a2bd97fadae21ab21114

240 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data, specifically triggering the CVE-2017-11882 vulnerability within the Equation Editor. This exploit allows for arbitrary code execution on the victim's machine. The presence of the ".bin" embedded artifact further supports the exploitation of this vulnerability.

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
CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882

Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
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_off0000003c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C	4145 bytes
SHA-256: `d849afc9d4e46de63dac02276dfc905242c494405ff5ce4aab3d99145d07aaa0`

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