RTF malware analysis — malicious · 62de916fa30c7d90

MALICIOUS

RTF

50.2 KB First seen: 2019-01-12

MD5: f16048f6686edce40ed34574a35b175f SHA-1: 9555596149f3bc9d336423f136b5f1ac8ea6ca8d SHA-256: 62de916fa30c7d903927de4731f5f81d40c82bb09267cf4eaf3e5aab8c6dac46

200 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution, indicating a malicious exploit. No specific family could be identified, and no further IOCs were extracted.

Heuristics 5

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
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object

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	3628 bytes
SHA-256: `1a0d97d2d80578d8aad42d0480412eaa3a288290fc45d76c5593a0115b48b7da`

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