asyncrat | 1887fa1977cff3ff0c883ec2659c06d88f344902b515bece48e599790411b1d8

General

Target

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
Size

45KB
MD5

a7f473e14b7c3e56561ff51f87b2f279
SHA1

799bb3816916db3e6e92ff665c34e020cf444859
SHA256

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361
SHA512

eb118655b71c4b04cc9da4de9f943b98ce9c7ca562835a39a757a4e5f333da0fdcb39c34eec0f5351855875a301078ecc96126af32c17f4f1eff512c4cdc5e69
SSDEEP

768:TuERVThg5RXWUr/+1mo2qD84lNVx1VEHUPIKFjbmgX3inm6AhL1uQHQoBDZTx:TuERVThaa2AlQKNb5XSTApHdTx

Score

10^/10

asyncrat com surrogate rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

COM Surrogate

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:1604

127.0.0.1:14576

127.0.0.1:15074

4.tcp.eu.ngrok.io:6606

4.tcp.eu.ngrok.io:7707

4.tcp.eu.ngrok.io:8808

4.tcp.eu.ngrok.io:1604

4.tcp.eu.ngrok.io:14576

4.tcp.eu.ngrok.io:15074

7.tcp.eu.ngrok.io:6606

7.tcp.eu.ngrok.io:7707

7.tcp.eu.ngrok.io:8808

7.tcp.eu.ngrok.io:1604

7.tcp.eu.ngrok.io:14576

7.tcp.eu.ngrok.io:15074

Mutex

COM Surrogate

Attributes

delay
3
install
true
install_file
Microsoftfixer.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 6 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1236-54-0x00000000013B0000-0x00000000013C2000-memory.dmp	asyncrat
\Users\Admin\AppData\Roaming\Microsoftfixer.exe	asyncrat
C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe	asyncrat
C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe	asyncrat
behavioral1/memory/1740-68-0x0000000001000000-0x0000000001012000-memory.dmp	asyncrat
behavioral1/memory/1740-69-0x0000000004850000-0x0000000004890000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

Processes:

Microsoftfixer.exe

pid process

1740 Microsoftfixer.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1780 cmd.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
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

796 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

816 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe

pid process

1236 05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe

pid	process
1740	Microsoftfixer.exe

pid	process
1780	cmd.exe

pid	process
796	schtasks.exe

pid	process
816	timeout.exe

pid	process
1236	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exeMicrosoftfixer.exe

description	pid	process
Token: SeDebugPrivilege	1236	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
Token: SeDebugPrivilege	1740	Microsoftfixer.exe
Token: SeDebugPrivilege	1740	Microsoftfixer.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.execmd.execmd.exe

description	pid	process	target process
PID 1236 wrote to memory of 1632	1236	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 1236 wrote to memory of 1632	1236	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 1236 wrote to memory of 1632	1236	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 1236 wrote to memory of 1632	1236	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 1236 wrote to memory of 1780	1236	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 1236 wrote to memory of 1780	1236	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 1236 wrote to memory of 1780	1236	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 1236 wrote to memory of 1780	1236	05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe	cmd.exe
PID 1632 wrote to memory of 796	1632	cmd.exe	schtasks.exe
PID 1632 wrote to memory of 796	1632	cmd.exe	schtasks.exe
PID 1632 wrote to memory of 796	1632	cmd.exe	schtasks.exe
PID 1632 wrote to memory of 796	1632	cmd.exe	schtasks.exe
PID 1780 wrote to memory of 816	1780	cmd.exe	timeout.exe
PID 1780 wrote to memory of 816	1780	cmd.exe	timeout.exe
PID 1780 wrote to memory of 816	1780	cmd.exe	timeout.exe
PID 1780 wrote to memory of 816	1780	cmd.exe	timeout.exe
PID 1780 wrote to memory of 1740	1780	cmd.exe	Microsoftfixer.exe
PID 1780 wrote to memory of 1740	1780	cmd.exe	Microsoftfixer.exe
PID 1780 wrote to memory of 1740	1780	cmd.exe	Microsoftfixer.exe
PID 1780 wrote to memory of 1740	1780	cmd.exe	Microsoftfixer.exe

C:\Users\Admin\AppData\Local\Temp\05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe
"C:\Users\Admin\AppData\Local\Temp\05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1236

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Microsoftfixer" /tr '"C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:1632

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Microsoftfixer" /tr '"C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe"'
3⤵
- Creates scheduled task(s)
PID:796

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp17C6.tmp.bat""
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1780

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:816

C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe
"C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1740

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp17C6.tmp.bat
Filesize
158B

MD5
31aebd67e91f07d274149b0b69a845b2

SHA1
10f05c96ae995e11cb4c0eb951ca65948fc2065f

SHA256
d284963fc02bda883513e8efa91b4efca76af245527b9c2bc41ba5428fff3c22

SHA512
067406d028ad5a1acefecf7a9b4c46fd234ac830203a0253f83fd112d03bdbdbe298a1640eb6051bddeb75dab25986ba7ff475602d8106a4432d503480e4c4c9

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp17C6.tmp.bat
Filesize
158B

MD5
31aebd67e91f07d274149b0b69a845b2

SHA1
10f05c96ae995e11cb4c0eb951ca65948fc2065f

SHA256
d284963fc02bda883513e8efa91b4efca76af245527b9c2bc41ba5428fff3c22

SHA512
067406d028ad5a1acefecf7a9b4c46fd234ac830203a0253f83fd112d03bdbdbe298a1640eb6051bddeb75dab25986ba7ff475602d8106a4432d503480e4c4c9

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe
Filesize
45KB

MD5
a7f473e14b7c3e56561ff51f87b2f279

SHA1
799bb3816916db3e6e92ff665c34e020cf444859

SHA256
05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361

SHA512
eb118655b71c4b04cc9da4de9f943b98ce9c7ca562835a39a757a4e5f333da0fdcb39c34eec0f5351855875a301078ecc96126af32c17f4f1eff512c4cdc5e69

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoftfixer.exe
Filesize
45KB

MD5
a7f473e14b7c3e56561ff51f87b2f279

SHA1
799bb3816916db3e6e92ff665c34e020cf444859

SHA256
05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361

SHA512
eb118655b71c4b04cc9da4de9f943b98ce9c7ca562835a39a757a4e5f333da0fdcb39c34eec0f5351855875a301078ecc96126af32c17f4f1eff512c4cdc5e69

Download Submit
\Users\Admin\AppData\Roaming\Microsoftfixer.exe
Filesize
45KB

MD5
a7f473e14b7c3e56561ff51f87b2f279

SHA1
799bb3816916db3e6e92ff665c34e020cf444859

SHA256
05b1080658b2c922f7becdb930e8f9fc34822b27982a4d89784f335565df7361

SHA512
eb118655b71c4b04cc9da4de9f943b98ce9c7ca562835a39a757a4e5f333da0fdcb39c34eec0f5351855875a301078ecc96126af32c17f4f1eff512c4cdc5e69

Download Submit
memory/1236-54-0x00000000013B0000-0x00000000013C2000-memory.dmp

Filesize
72KB

Download
memory/1236-55-0x0000000004C20000-0x0000000004C60000-memory.dmp

Filesize
256KB

Download
memory/1740-68-0x0000000001000000-0x0000000001012000-memory.dmp

Filesize
72KB

Download
memory/1740-69-0x0000000004850000-0x0000000004890000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads