RTF malware analysis — malicious · 6e690ab6f0044638

MALICIOUS

RTF

8.2 KB First seen: 2019-06-27

MD5: 7d6fa422d8eea8589802129353d41d98 SHA-1: 2ff971211e14453440a35ae74c3db570bcb47584 SHA-256: 6e690ab6f0044638a959b78c81c4f473d804ac1e1801b0491380d7f7e68c23b3

200 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that leverages the Equation Editor, a known vector for exploiting CVE-2017-11882. This exploit allows for arbitrary code execution on the victim's machine. The ClamAV detection explicitly names this CVE, confirming the exploitation attempt.

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
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	4147 bytes
SHA-256: `0e7a4795af2b4c6f5f839adcd0a52e004d59856e3c997c3afeda0261f95258bc`

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