Openhunting Threat Library

Bemstour

Bemstour
(Type: Backdoor)

(Symantec) Bemstour exploits two Windows vulnerabilities in order to achieve remote kernel code execution on targeted computers. One vulnerability is a Windows zero-day vulnerability (CVE-2019-0703) discovered by Symantec. The second Windows vulnerability (CVE-2017-0143) was patched in March 2017 after it was discovered to have been used by two exploit tools—{{EternalRomance}} and EternalSynergy—that were also released as part of the Shadow Brokers leak.

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[TTP Analysis] Mitre Attack Matrix:

TA0043 TA0042 TA0001 TA0002 TA0003 TA0004 TA0005 TA0006 TA0007 TA0008 TA0009 TA0011 TA0010 TA0040
Reconnaissance Resource Development Initial Access Execution Persistence Privilege Escalation Defense Evasion Credential Access Discovery Lateral Movement Collection Command and Control Exfiltration Impact


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References:

News Basic Information Indicator of Compromise Mitre Attack

Basic Information (Credit @etda.or.th)

Tool: Bemstour

Names: Bemstour

Description: (Symantec) Bemstour exploits two Windows vulnerabilities in order to achieve remote kernel code execution on targeted computers. One vulnerability is a Windows zero-day vulnerability (CVE-2019-0703) discovered by Symantec. The second Windows vulnerability (CVE-2017-0143) was patched in March 2017 after it was discovered to have been used by two exploit tools—{{EternalRomance}} and EternalSynergy—that were also released as part of the Shadow Brokers leak.

Category: Malware

Type: Backdoor

Information: https://symantec-blogs.broadcom.com/blogs/threat-intelligence/buckeye-windows-zero-day-exploit

Alienvault-otx: https://otx.alienvault.com/browse/pulses?q=tag:Bemstour

Last-card-change: 2020-04-20

Source: https://apt.etda.or.th/cgi-bin/listtools.cgi

TA0043 TA0042 TA0001 TA0002 TA0003 TA0004 TA0005 TA0006 TA0007 TA0008 TA0009 TA0011 TA0010 TA0040
Reconnaissance Resource Development Initial Access Execution Persistence Privilege Escalation Defense Evasion Credential Access Discovery Lateral Movement Collection Command and Control Exfiltration Impact