Bazar

S0534

Malware.View on attack.mitre.org

About this malware

Bazar is a downloader and backdoor that has been used since at least April 2020, with infections primarily against professional services, healthcare, manufacturing, IT, logistics and travel companies across the US and Europe. Bazar reportedly has ties to TrickBot campaigns and can be used to deploy additional malware, including ransomware, and to steal sensitive data.

Techniques used51

Procedure examples51

TechniqueProcedure example
T1005
Data from Local System

Bazar can retrieve information from the infected machine.

T1008
Fallback Channels

Bazar has the ability to use an alternative C2 server if the primary server fails.

T1012
Query Registry

Bazar can query Windows\CurrentVersion\Uninstall for installed applications.

T1016
System Network Configuration Discovery

Bazar can collect the IP address and NetBIOS name of an infected machine.

T1018
Remote System Discovery

Bazar can enumerate remote systems using Net View.

T1027.002
Software Packing

Bazar has a variant with a packed payload.

T1027.007
Dynamic API Resolution

Bazar can hash then resolve API calls at runtime.

T1027.013
Encrypted/Encoded File

Bazar has used XOR, RSA2, and RC4 encrypted files.

T1033
System Owner/User Discovery

Bazar can identify the username of the infected user.

T1036.004
Masquerade Task or Service

Bazar can create a task named to appear benign.

T1036.005
Match Legitimate Resource Name or Location

The Bazar loader has named malicious shortcuts "adobe" and mimicked communications software.

T1036.007
Double File Extension

The Bazar loader has used dual-extension executable files such as PreviewReport.DOC.exe.

T1047
Windows Management Instrumentation

Bazar can execute a WMI query to gather information about the installed antivirus engine.

T1053.005
Scheduled Task

Bazar can create a scheduled task for persistence.

T1055
Process Injection

Bazar can inject code through calling VirtualAllocExNuma.

View all 51 procedure examples

Groups that use it2

Campaigns1

References1

  1. Cybereason Bazar July 2020 Open source
    Cybereason Nocturnus. (2020, July 16). A BAZAR OF TRICKS: FOLLOWING TEAM9’S DEVELOPMENT CYCLES. Retrieved November 18, 2020.

Data from MITRE ATT&CK® (Enterprise). ATT&CK® is a registered trademark of The MITRE Corporation.