RTF malware analysis — malicious · b5eb50c8b44c2bbf

MALICIOUS

RTF

8.2 KB First seen: 2020-04-06

MD5: 396058f2b5792c817e8cde8d5551592e SHA-1: 6b57d49927f15e654aac36c1cbc4e2a0d6b1667e SHA-256: b5eb50c8b44c2bbf13ece8a1e071c6894e6b46bdfce6750813c261c42bef0d3a

200 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that leverages a known vulnerability in Microsoft Equation Editor (CVE-2017-11882). This exploit allows for arbitrary code execution upon opening the document. The ClamAV detection signature directly identifies this specific exploit.

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: 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_off0000003b.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3B	4150 bytes
SHA-256: `dad1ebeb7d894e39ee54a86c10dbf2ed9ca10922157b846f80948f300ba0f808`

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