RTF malware analysis — malicious · 4bdf7168a433e644

MALICIOUS

RTF

8.4 KB Authoring application: Riched20 6.3.9600

MD5: c75727a833565c91855657bbb98b78f3 SHA-1: de5908a8f66baae59f6eac47c53a75cd1059f6dc SHA-256: 4bdf7168a433e644df90ca4398cc69c15444e0961139ab35a8ca070555530549

260 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains embedded OLE objects, specifically identified as Microsoft Equation Editor. Critical heuristics indicate the exploitation of CVE-2017-11882, a known vulnerability in Equation Editor that allows for arbitrary code execution. This exploit is likely used to download and execute a second-stage 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` `7bb802e55edc0b45569948a1f940e63711addd620af6da06501b4e25812f92a4`	rtf-objdata-decoded	RTF \objdata at offset 0x100	3546 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.