asyncrat | 361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0

Analysis

max time kernel
148s
max time network
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/07/2026, 11:43

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General

Target
361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
Size 45KB
Sample260710-nv1vmaby4s
SHA256 361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0
MD5 baa570439f80972cdf3511c51b18a83c
SHA1 d0f079f314fc6e55756a52ab5db9ce003b8e85f8
SHA512 8026e9e9c276421036918718bd5873f893393ded3ebfcb55a12d57f2d9146f109970917f3e28b06f4b8c2212208445a1d2b87c678999b10e7ffa1096b2955b1f
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q1w0b3NEAteiZPISzjb1g+3iXpZYfgDGBDZUx:cuR0JTPjY2a3ehiWS3bS+SXcfbdUx
TLSH
T150231B103BE9812BF2BE4F7468F26145467AF6632603E54E1CC451D74B23BC69A43AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

sexviet74.com:80
sexviet74.com:22
sexviet74.com:8080
sexviet74.com:8880
sexviet74.com:2052
sexviet74.com:2082
sexviet74.com:2086
sexviet74.com:2095
sexviet74.com:443
sexviet74.com:2053
sexviet74.com:2083
sexviet74.com:2087
sexviet74.com:2096
sexviet74.com:8443
www.sexviet74.com:80
www.sexviet74.com:22
www.sexviet74.com:8080
www.sexviet74.com:8880
www.sexviet74.com:2052
www.sexviet74.com:2082
www.sexviet74.com:2086
www.sexviet74.com:2095
www.sexviet74.com:443
www.sexviet74.com:2053
www.sexviet74.com:2083
www.sexviet74.com:2087
www.sexviet74.com:2096
www.sexviet74.com:8443
ryuk.sexviet74.com:80
ryuk.sexviet74.com:22
ryuk.sexviet74.com:8080
ryuk.sexviet74.com:8880
ryuk.sexviet74.com:2052
ryuk.sexviet74.com:2082
ryuk.sexviet74.com:2086
ryuk.sexviet74.com:2095
ryuk.sexviet74.com:443
ryuk.sexviet74.com:2053
ryuk.sexviet74.com:2083
ryuk.sexviet74.com:2087
ryuk.sexviet74.com:2096
ryuk.sexviet74.com:8443
blaster.sexviet74.com:80
blaster.sexviet74.com:22
blaster.sexviet74.com:8080
blaster.sexviet74.com:8880
blaster.sexviet74.com:2052
blaster.sexviet74.com:2082
blaster.sexviet74.com:2086
blaster.sexviet74.com:2095
blaster.sexviet74.com:443
blaster.sexviet74.com:2053
blaster.sexviet74.com:2083
blaster.sexviet74.com:2087
blaster.sexviet74.com:2096
blaster.sexviet74.com:8443
malware.sexviet74.com:80
malware.sexviet74.com:22
malware.sexviet74.com:8080
malware.sexviet74.com:8880
malware.sexviet74.com:2052
malware.sexviet74.com:2082
malware.sexviet74.com:2086
malware.sexviet74.com:2095
malware.sexviet74.com:443
malware.sexviet74.com:2053
malware.sexviet74.com:2083
malware.sexviet74.com:2087
malware.sexviet74.com:2096
malware.sexviet74.com:8443

Mutex

c1SD0HTSlOtd

Attributes

delay
0
install
true
install_file
b9ok.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/0x000d00000001c5da-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2472	b9ok.exe
1808	b9ok.exe

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

System Information Discovery
T1082

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b9ok.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b9ok.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3412	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
1940	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
Token: SeDebugPrivilege	2472	b9ok.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3276 wrote to memory of 4128	3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe	87
PID 3276 wrote to memory of 4488	3276	361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe	88
PID 4488 wrote to memory of 3412	4488	cmd.exe	91
PID 4128 wrote to memory of 1940	4128	cmd.exe	92
PID 4488 wrote to memory of 1808	4488	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe
"C:\Users\Admin\AppData\Local\Temp\361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3276
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "b9ok" /tr '"C:\Users\Admin\AppData\Roaming\b9ok.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4128
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "b9ok" /tr '"C:\Users\Admin\AppData\Roaming\b9ok.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1940
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7F96.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4488
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3412
- - C:\Users\Admin\AppData\Roaming\b9ok.exe
    "C:\Users\Admin\AppData\Roaming\b9ok.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1808

C:\Users\Admin\AppData\Roaming\b9ok.exe
"C:\Users\Admin\AppData\Roaming\b9ok.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2472

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

tmp7F96.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7F96.tmp.bat
Size 148B
SHA256 5361a15ad110ec0d38c994b4c5fd8867d5198754695ee0a480f1520476c1f59c
MD5 1b8d228a7fb1a84efb43867f6afc7290
SHA1 5a9c42e868f4f7cd7093e6d372fcee0357511289
SHA512 5703e77baf1334d0fc0875c47b63eed4f78b2a2e24f78f3d11844d644ca8a8373e8dc2cca58ea7e1f5a82e1c30c65142c298a4d1dfc3b45b955efd2ceb962c8f
TLSH
T122C02B5352C9EA0E3905181307FAE48C91766C1D3F44FB00C304402F528044DF4E9341
MD5 SHA1 SHA512 TLSH

Submit Download

b9ok.exe

Path C:\Users\Admin\AppData\Roaming\b9ok.exe
Size 45KB
SHA256 361d89a0f99ef178856c1b459139e73c10b580dd19902d77bc113998a92062e0
MD5 baa570439f80972cdf3511c51b18a83c
SHA1 d0f079f314fc6e55756a52ab5db9ce003b8e85f8
SHA512 8026e9e9c276421036918718bd5873f893393ded3ebfcb55a12d57f2d9146f109970917f3e28b06f4b8c2212208445a1d2b87c678999b10e7ffa1096b2955b1f
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q1w0b3NEAteiZPISzjb1g+3iXpZYfgDGBDZUx:cuR0JTPjY2a3ehiWS3bS+SXcfbdUx
TLSH
T150231B103BE9812BF2BE4F7468F26145467AF6632603E54E1CC451D74B23BC69A43AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2472-12-0x0000000074820000-0x0000000074FDC000-memory.dmp

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memory/2472-14-0x0000000074820000-0x0000000074FDC000-memory.dmp

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memory/3276-0-0x00000000749A2000-0x00000000749A3000-memory.dmp

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memory/3276-1-0x0000000000A20000-0x0000000000A32000-memory.dmp

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memory/3276-2-0x0000000074990000-0x000000007514C000-memory.dmp

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memory/3276-3-0x0000000005510000-0x00000000055AC000-memory.dmp

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memory/3276-8-0x0000000074990000-0x000000007514C000-memory.dmp

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