RTF malware analysis — malicious · 27dd79b51293a4f4

MALICIOUS

RTF

49.2 KB First seen: 2019-01-11

MD5: 2e17a7edd31fd1bd0f64a5469bf0ff14 SHA-1: 4809621caacfa05bf0663594f85d601d6c88e86b SHA-256: 27dd79b51293a4f4b4e640447288510682369750e3e0d89abde1b08fcb498ba2

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains OLE object data and triggers an \objupdate event, indicating it is designed to activate embedded objects. ClamAV explicitly identifies this file as exploiting CVE-2017-11882, a known vulnerability in the Equation Editor component of Microsoft Office. This exploit allows for arbitrary code execution, likely as a first stage to download and run a secondary payload.

Heuristics 3

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_off0000003a.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3A	4149 bytes
SHA-256: `e7727f869689060bf9dd5593d65f1901d41df357078a32dce156b2f9768a9d7b`

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