asyncrat | 650ce0611e51d1a7aa28943d1a9a974e4803093287bf13f9b1e612345ebdf8ff

General

Target

db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe
Size

87KB
MD5

ca699117112a173ca7b289f1baf6c3c0
SHA1

862f227d4fa0b4de892006d7fe19e610e9f1a676
SHA256

db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6
SHA512

d9f82f6e18ce2eb624a5ee1e20618318fde7ffdcff834d9c0291f4971bd72ce9b7f5108bf45f11ceed4d1f526bad4842913e833a25e3d99a3235d6f87b4d2620
SSDEEP

1536:sUZggDGVM9WSZvZHU+uyWrHyHndw/VTtvVCMI4bgAQ9uaJZA2DJpO:sUigDGVMU4vZUZJmHdeVTtI4bgAQ9uaE

Score

10^/10

asyncrat defendersmartscren persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

DefenderSmartScren

C2

217.64.31.3:8437

Mutex

DefenderSmartScren

Attributes

delay
3
install
false
install_file
SecurityHealtheurvice.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4088-139-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

powershell.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SecurityHealthService = "C:\\Users\\Admin\\AppData\\Roaming\\SecurityHealthService\\SecurityHealthService.exe"	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe

description	pid	process	target process
PID 4748 set thread context of 4088	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	RegAsm.exe

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4172 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

4932 powershell.exe
4932 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 4932 powershell.exe

pid	process
4172	schtasks.exe

pid	process
4932	powershell.exe
4932	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4932	powershell.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.execmd.exe

description	pid	process	target process
PID 4748 wrote to memory of 4932	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	powershell.exe
PID 4748 wrote to memory of 4932	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	powershell.exe
PID 4748 wrote to memory of 4932	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	powershell.exe
PID 4748 wrote to memory of 4184	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	cmd.exe
PID 4748 wrote to memory of 4184	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	cmd.exe
PID 4748 wrote to memory of 4184	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	cmd.exe
PID 4184 wrote to memory of 4172	4184	cmd.exe	schtasks.exe
PID 4184 wrote to memory of 4172	4184	cmd.exe	schtasks.exe
PID 4184 wrote to memory of 4172	4184	cmd.exe	schtasks.exe
PID 4748 wrote to memory of 4088	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	RegAsm.exe
PID 4748 wrote to memory of 4088	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	RegAsm.exe
PID 4748 wrote to memory of 4088	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	RegAsm.exe
PID 4748 wrote to memory of 4088	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	RegAsm.exe
PID 4748 wrote to memory of 4088	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	RegAsm.exe
PID 4748 wrote to memory of 4088	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	RegAsm.exe
PID 4748 wrote to memory of 4088	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	RegAsm.exe
PID 4748 wrote to memory of 4088	4748	db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe
"C:\Users\Admin\AppData\Local\Temp\db805d5ac09ea9d18a3016d4c70cbb52087604fe5ad23fd8043399c970c0c8a6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4748

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'SecurityHealthService';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'SecurityHealthService' -Value '"C:\Users\Admin\AppData\Roaming\SecurityHealthService\SecurityHealthService.exe"' -PropertyType 'String'
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4932

C:\Windows\SysWOW64\cmd.exe
"cmd" /C schtasks /create /tn \SecurityHealthService /tr "C:\Users\Admin\AppData\Roaming\SecurityHealthService\SecurityHealthService.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f
2⤵
- Suspicious use of WriteProcessMemory
PID:4184

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn \SecurityHealthService /tr "C:\Users\Admin\AppData\Roaming\SecurityHealthService\SecurityHealthService.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:4172

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
#cmd
2⤵
PID:4088

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/4088-138-0x0000000000000000-mapping.dmp

Download
memory/4088-139-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4172-136-0x0000000000000000-mapping.dmp

Download
memory/4184-135-0x0000000000000000-mapping.dmp

Download
memory/4748-133-0x0000000005200000-0x00000000057A4000-memory.dmp

Filesize
5.6MB

Download
memory/4748-132-0x0000000000380000-0x000000000039C000-memory.dmp

Filesize
112KB

Download
memory/4932-144-0x0000000006790000-0x00000000067AE000-memory.dmp

Filesize
120KB

Download
memory/4932-147-0x0000000006D40000-0x0000000006D5E000-memory.dmp

Filesize
120KB

Download
memory/4932-140-0x0000000005940000-0x0000000005F68000-memory.dmp

Filesize
6.2MB

Download
memory/4932-141-0x00000000057D0000-0x00000000057F2000-memory.dmp

Filesize
136KB

Download
memory/4932-142-0x00000000060A0000-0x0000000006106000-memory.dmp

Filesize
408KB

Download
memory/4932-143-0x0000000006110000-0x0000000006176000-memory.dmp

Filesize
408KB

Download
memory/4932-134-0x0000000000000000-mapping.dmp

Download
memory/4932-145-0x0000000007740000-0x0000000007772000-memory.dmp

Filesize
200KB

Download
memory/4932-146-0x0000000072560000-0x00000000725AC000-memory.dmp

Filesize
304KB

Download
memory/4932-137-0x00000000051C0000-0x00000000051F6000-memory.dmp

Filesize
216KB

Download
memory/4932-148-0x00000000080E0000-0x000000000875A000-memory.dmp

Filesize
6.5MB

Download
memory/4932-149-0x0000000007AA0000-0x0000000007ABA000-memory.dmp

Filesize
104KB

Download
memory/4932-150-0x0000000007B10000-0x0000000007B1A000-memory.dmp

Filesize
40KB

Download
memory/4932-151-0x0000000007D20000-0x0000000007DB6000-memory.dmp

Filesize
600KB

Download
memory/4932-152-0x0000000007CD0000-0x0000000007CDE000-memory.dmp

Filesize
56KB

Download
memory/4932-153-0x0000000007DE0000-0x0000000007DFA000-memory.dmp

Filesize
104KB

Download
memory/4932-154-0x0000000007DC0000-0x0000000007DC8000-memory.dmp

Filesize
32KB

Download
memory/4932-155-0x0000000007E00000-0x0000000007E22000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads