bazarbackdoor | 8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4

General

Target
8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe
Size 365KB
Sample200910-qkcd2agbt2
SHA256 8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4
MD5 5f64cc672ea13388797599b40a62d9be
SHA1 82523c8c89c052c7bda11b1ad0bf27affd26e906
SHA512 3c22f98b26826024e378e0e8cf148641d0b1b1d119a97f574ce6fbcd83e4b54b685bb72be1193c1a7b860b34480e88ed1a4ff64af9cc1bafad58e1d6d4ff5cfb
MD5 SHA1 SHA512

Score

10^/10

bazarbackdoor backdoor

Malware Config

Signatures

BazarBackdoor
Stealthy backdoor targeting corporate networks, believed to be developed by Trickbot's authors.
backdoor bazarbackdoor

Bazar/Team9 Backdoor payload 3 IoCs

resource	yara_rule
behavioral2/memory/3120-11-0x0000000140000000-0x0000000140040000-memory.dmp	BazarBackdoorVar4
behavioral2/memory/3120-12-0x0000000140017F2C-mapping.dmp	BazarBackdoorVar4
behavioral2/memory/3120-13-0x0000000140000000-0x0000000140040000-memory.dmp	BazarBackdoorVar4

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3888 set thread context of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ServiceProfiles\LocalService\winhttp\cachev3.dat	svchost.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	svchost.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionReason = "1"	svchost.exe
Set value (data)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionTime = 0a87ba816087d601	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecision = "0"	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe
3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	344	svchost.exe
Token: SeCreatePagefilePrivilege	344	svchost.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3888 wrote to memory of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76
PID 3888 wrote to memory of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76
PID 3888 wrote to memory of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76
PID 3888 wrote to memory of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76
PID 3888 wrote to memory of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76
PID 3888 wrote to memory of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76
PID 3888 wrote to memory of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76
PID 3888 wrote to memory of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76
PID 3888 wrote to memory of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76
PID 3888 wrote to memory of 3120	3888	8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe	76

C:\Users\Admin\AppData\Local\Temp\8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe
"C:\Users\Admin\AppData\Local\Temp\8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3888
- C:\Windows\SYSTEM32\cmd.exe
  "cmd"
  2⤵
  PID:3120

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:344

C:\Users\Admin\AppData\Local\Temp\8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe
"C:\Users\Admin\AppData\Local\Temp\8320e50369b6d17c6d939347fa762213b491ffed93aa5b54d7fc5e4ad8fbf4d4.exe" -r {1C030430-7C4D-4B1A-A15A-083CE4F3D952}
1⤵
PID:3824

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/3120-11-0x0000000140000000-0x0000000140040000-memory.dmp

Download

memory/3120-13-0x0000000140000000-0x0000000140040000-memory.dmp

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memory/3888-0-0x000001BE4A840000-0x000001BE4A85F000-memory.dmp

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memory/3888-1-0x0000000140000000-0x0000000140021000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix

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Downloads