bazarloader | 9c4807666747c9befea4427e5b9791193fdb105d53400639e8cc401d92463be2

Resubmissions

01-11-2021 12:31

211101-pp5r3ahha4 10

31-10-2021 09:03

211031-k1bwxacfaq 10

14-10-2021 01:44

211014-b6aflafeg4 10

Analysis

max time kernel
559s
max time network
573s
platform
windows11_x64
resource
win11
submitted
01-11-2021 12:31

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Report Analysis Logs

General

Target

417c1828d98ba4f05f7a2edb71a9105f0aebf3d554393970b96e59d4db7b4473.dll
Size

359KB
MD5

4f18fd01d6afd232553fbbf602b2a4e2
SHA1

e50a8e3bfb891dc723f5c7fc2276055102d0a097
SHA256

417c1828d98ba4f05f7a2edb71a9105f0aebf3d554393970b96e59d4db7b4473
SHA512

750493256643799b3de954298874f6df1d87bf6fd3afa259689af2ba9159374f274937490be6159650237a74778e5565e4f9d4e5e359f9e71cc1c5fd385b4dd3

Score

10^/10

bazarloader dropper loader persistence

Malware Config

Signatures

Bazar Loader
Detected loader normally used to deploy BazarBackdoor malware.
loader dropper bazarloader

Bazar/Team9 Loader payload 1 IoCs

Processes:

resource	yara_rule
behavioral10/memory/3252-146-0x0000000001FE0000-0x000000000200C000-memory.dmp	BazarLoaderVar5

Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Tries to connect to .bazar domain 48 IoCs

Attempts to lookup or connect to a .bazar domain, used by BazarBackdoor, Trickbot, and potentially others.

Processes:

flow	ioc
68	blackrain15.bazar
81	whitestorm9p.bazar
96	reddew28c.bazar
98	bluehail.bazar
102	whitestorm9p.bazar
105	whitestorm9p.bazar
71	blackrain15.bazar
73	reddew28c.bazar
79	bluehail.bazar
91	blackrain15.bazar
97	reddew28c.bazar
104	whitestorm9p.bazar
49	blackrain15.bazar
56	bluehail.bazar
60	whitestorm9p.bazar
69	blackrain15.bazar
94	reddew28c.bazar
101	bluehail.bazar
63	whitestorm9p.bazar
83	whitestorm9p.bazar
90	blackrain15.bazar
76	reddew28c.bazar
47	blackrain15.bazar
53	reddew28c.bazar
58	bluehail.bazar
61	whitestorm9p.bazar
62	whitestorm9p.bazar
70	blackrain15.bazar
74	reddew28c.bazar
77	bluehail.bazar
92	blackrain15.bazar
95	reddew28c.bazar
50	blackrain15.bazar
57	bluehail.bazar
52	reddew28c.bazar
55	reddew28c.bazar
75	reddew28c.bazar
78	bluehail.bazar
103	whitestorm9p.bazar
99	bluehail.bazar
48	blackrain15.bazar
54	reddew28c.bazar
59	bluehail.bazar
80	bluehail.bazar
82	whitestorm9p.bazar
84	whitestorm9p.bazar
89	blackrain15.bazar
100	bluehail.bazar

Drops file in Windows directory 8 IoCs

Processes:

svchost.exeTiWorker.exe

description	ioc	process
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.edb	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe
File opened for modification	C:\Windows\Logs\CBS\CBS.log	TiWorker.exe
File opened for modification	C:\Windows\WinSxS\pending.xml	TiWorker.exe
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	svchost.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

svchost.exe

description	ioc	process
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe

Modifies data under HKEY_USERS 64 IoCs

Processes:

svchost.exeWaaSMedicAgent.exeWaaSMedicAgent.exeWaaSMedicAgent.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

svchost.exesvchost.exeTiWorker.exe

description	pid	process
Token: SeShutdownPrivilege	2400	svchost.exe
Token: SeCreatePagefilePrivilege	2400	svchost.exe
Token: SeShutdownPrivilege	2400	svchost.exe
Token: SeCreatePagefilePrivilege	2400	svchost.exe
Token: SeShutdownPrivilege	2400	svchost.exe
Token: SeCreatePagefilePrivilege	2400	svchost.exe
Token: SeShutdownPrivilege	984	svchost.exe
Token: SeCreatePagefilePrivilege	984	svchost.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe
Token: SeSecurityPrivilege	1668	TiWorker.exe
Token: SeBackupPrivilege	1668	TiWorker.exe
Token: SeRestorePrivilege	1668	TiWorker.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

svchost.exe

description	pid	process	target process
PID 984 wrote to memory of 340	984	svchost.exe	MoUsoCoreWorker.exe
PID 984 wrote to memory of 340	984	svchost.exe	MoUsoCoreWorker.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\417c1828d98ba4f05f7a2edb71a9105f0aebf3d554393970b96e59d4db7b4473.dll
1⤵
PID:3252

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe f8a6ee6171f0698842d32621209b5156 SCuJsxV4mkC97/IYyJYK8w.0.1.0.3.0
1⤵
- Modifies data under HKEY_USERS
PID:1792

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:2400

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s UsoSvc
1⤵
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:984

C:\Windows\uus\AMD64\MoUsoCoreWorker.exe
C:\Windows\uus\AMD64\MoUsoCoreWorker.exe
2⤵
PID:340

C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.22000.100_none_04da31ff4c67c24a\TiWorker.exe
C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.22000.100_none_04da31ff4c67c24a\TiWorker.exe -Embedding
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:1668

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe f8a6ee6171f0698842d32621209b5156 SCuJsxV4mkC97/IYyJYK8w.0.1.0.3.0
1⤵
- Modifies data under HKEY_USERS
PID:4396

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe f8a6ee6171f0698842d32621209b5156 SCuJsxV4mkC97/IYyJYK8w.0.1.0.3.0
1⤵
- Modifies data under HKEY_USERS
PID:3192

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/340-150-0x0000000000000000-mapping.dmp

Download
memory/2400-147-0x000001A019560000-0x000001A019570000-memory.dmp

Filesize
64KB

Download
memory/2400-148-0x000001A019C20000-0x000001A019C30000-memory.dmp

Filesize
64KB

Download
memory/2400-149-0x000001A01C340000-0x000001A01C344000-memory.dmp

Filesize
16KB

Download
memory/2400-152-0x000001A01CAC0000-0x000001A01CAC1000-memory.dmp

Filesize
4KB

Download
memory/2400-151-0x000001A01CAD0000-0x000001A01CAD4000-memory.dmp

Filesize
16KB

Download
memory/2400-153-0x000001A01ED20000-0x000001A01ED24000-memory.dmp

Filesize
16KB

Download
memory/2400-154-0x000001A01CAA0000-0x000001A01CAA1000-memory.dmp

Filesize
4KB

Download
memory/3252-146-0x0000000001FE0000-0x000000000200C000-memory.dmp

Filesize
176KB

Download