asyncrat | 2d23adddadc652330cb8ede9c2a425179138529b23d7f1a2c1fed56362c8764c

Analysis

max time kernel
148s
max time network
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
30/07/2026, 10:22

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General

Target
nysdufisdfi.exe
Size 45KB
Sample260730-md7feaff98
SHA256 2d23adddadc652330cb8ede9c2a425179138529b23d7f1a2c1fed56362c8764c
MD5 74743cb5ba7c879e94b3ad6820eeafe0
SHA1 f616c69232acc5cb6ecadc054780505f2656eef3
SHA512 28ed1222370ea9bbafbfe357e97098607b7cdf440e2654a3a2f4af47f6ca896e0d5a8b89a1c43979b1361d0e0538019e5080d0f9daef283d8ba72c1a323ba1c5
SSDEEP 768:puSPNTdxr7xWUpWm7mo2qLJPgPcuPI+zjb6g53iXyb59Ta9rBguhBDZ7x:puSPNTdtx2O4EX+3bt5Sid9+fBfd7x
TLSH
T197230A003BE9822BF2BE5F7898F26145467AF2A72603D64D1CC441DB5623FC68A526FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

admin defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Admin

toparenaslot.co/vi-vn/:80
toparenaslot.co/vi-vn/:443
toparenaslot.co/vi-vn/:7788
toparenaslot.co/vi-vn/:7879
toparenaslot.co/vi-vn/:3577
toparenaslot.co/:80
toparenaslot.co/:443
toparenaslot.co/:7788
toparenaslot.co/:7879
toparenaslot.co/:3577
www.toparenaslot.co/:80
www.toparenaslot.co/:443
www.toparenaslot.co/:7788
www.toparenaslot.co/:7879
www.toparenaslot.co/:3577

Mutex

R5o1yXCQ2suA

Attributes

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

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x00030000000170cb-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1124	nysdufisdfi.exe
1648	nysdufisdfi.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
5000	cmd.exe
5732	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nysdufisdfi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nysdufisdfi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nysdufisdfi.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1292	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4872	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe
1424	nysdufisdfi.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1424	nysdufisdfi.exe
Token: SeDebugPrivilege	1124	nysdufisdfi.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1424 wrote to memory of 5000	1424	nysdufisdfi.exe	89
PID 1424 wrote to memory of 5732	1424	nysdufisdfi.exe	91
PID 5000 wrote to memory of 4872	5000	cmd.exe	93
PID 5732 wrote to memory of 1292	5732	cmd.exe	94
PID 5732 wrote to memory of 1648	5732	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\nysdufisdfi.exe
"C:\Users\Admin\AppData\Local\Temp\nysdufisdfi.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1424
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "nysdufisdfi" /tr '"C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5000
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "nysdufisdfi" /tr '"C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4872
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp12F2.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5732
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1292
- - C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe
    "C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1648

C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe
"C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1124

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp12F2.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp12F2.tmp.bat
Size 155B
SHA256 8c15ecce0c25687668eb448c146415cc9dd36b2d18ac962ce97b00d845505c73
MD5 003430ffe1fbdd87f4f2eb4cdb7304d1
SHA1 f9a84f97d8f5a789612bdfb32fa4f7d162cd725a
SHA512 7722058303626f18e8d88d3cf7ffc8f7e02662b229c465bfe7a56b40fb8007149d4831f8fad6251671ade6d6cc74c4b89167e729a895bced85a8e4273ca23ac5
TLSH
T1AFC08C8262C9AA4E6909142306BA95AF9176686D3E80BB008708405E23C044CE0D9241
MD5 SHA1 SHA512 TLSH

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nysdufisdfi.exe

Path C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe
Size 45KB
SHA256 2d23adddadc652330cb8ede9c2a425179138529b23d7f1a2c1fed56362c8764c
MD5 74743cb5ba7c879e94b3ad6820eeafe0
SHA1 f616c69232acc5cb6ecadc054780505f2656eef3
SHA512 28ed1222370ea9bbafbfe357e97098607b7cdf440e2654a3a2f4af47f6ca896e0d5a8b89a1c43979b1361d0e0538019e5080d0f9daef283d8ba72c1a323ba1c5
SSDEEP 768:puSPNTdxr7xWUpWm7mo2qLJPgPcuPI+zjb6g53iXyb59Ta9rBguhBDZ7x:puSPNTdtx2O4EX+3bt5Sid9+fBfd7x
TLSH
T197230A003BE9822BF2BE5F7898F26145467AF2A72603D64D1CC441DB5623FC68A526FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1124-12-0x0000000075030000-0x00000000757EC000-memory.dmp

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memory/1124-14-0x0000000075030000-0x00000000757EC000-memory.dmp

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memory/1424-0-0x00000000750A2000-0x00000000750A3000-memory.dmp

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memory/1424-1-0x0000000000FC0000-0x0000000000FD2000-memory.dmp

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memory/1424-2-0x0000000075090000-0x000000007584C000-memory.dmp

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memory/1424-3-0x0000000005B10000-0x0000000005BAC000-memory.dmp

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memory/1424-9-0x0000000075090000-0x000000007584C000-memory.dmp

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