RTF malware analysis — malicious · ea29e4eeb223d153

MALICIOUS

RTF

8.4 KB Authoring application: Riched20 6.3.9600

MD5: ecaa347d6c2204b168ceedef367a30b8 SHA-1: fb26fe4a412dfcb2c72a4760ca37047b5dd1fe6a SHA-256: ea29e4eeb223d1537b448c545316e0a8434d05e4745e59ddeead5eeb5e34a8a1

260 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristics RTF_EQUATION_EDITOR, RTF_OBJCLASS_EQUATION, and CLAMAV_DETECTION strongly indicate exploitation of CVE-2017-11882 via the Equation Editor component within the RTF document. This vulnerability allows for arbitrary code execution, likely to download and run a secondary payload.

Heuristics 6

Equation Editor CLSID critical RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
Equation Editor object class critical RTF_OBJCLASS_EQUATION

Object class 'equation.3' references Equation Editor
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
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_off00000100.bin` `b6242c4cc54f367614af33749a818fb3ee0e712d5bf2dfb9c3dcdc9314d33111`	rtf-objdata-decoded	RTF \objdata at offset 0x100	3546 bytes

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