asyncrat | 03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf

Analysis

max time kernel
148s
max time network
153s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
03/08/2026, 17:37

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General

Target
03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
Size 45KB
Sample260803-v7a83ada65
SHA256 03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf
MD5 9a5e3aeeaf6c17c6184e4306fbfc99bc
SHA1 5e32f58296bfe3e691ab8441b03e00c5bb40be6a
SHA512 e5e59ab3a2828b106021a397bd279cbc1ba885d5b851e28e54b9c8cc210c685d8bff0559a363d6a7b38c8a7a25e9b2c58a555d0db511854ae18ce8798eec140e
SSDEEP 768:5uSy6pTpwrSWWUE3/WImo2qNfQ6vincPI9xjbGgX3i0nlIQ9iDT4mBDZ0x:5uSy6pTpoo2pKU9hbZXS0nlNc0od0x
TLSH
T13A232A0037E9C12BF2BE5F789DF26105467AF2633A03D68A1CC4119B5613BC69A526FE
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

sexviet41.com:80
sexviet41.com:22
sexviet41.com:8080
sexviet41.com:8880
sexviet41.com:2052
sexviet41.com:2082
sexviet41.com:2086
sexviet41.com:2095
sexviet41.com:443
sexviet41.com:2053
sexviet41.com:2083
sexviet41.com:2087
sexviet41.com:2096
sexviet41.com:8443
www.sexviet41.com:80
www.sexviet41.com:22
www.sexviet41.com:8080
www.sexviet41.com:8880
www.sexviet41.com:2052
www.sexviet41.com:2082
www.sexviet41.com:2086
www.sexviet41.com:2095
www.sexviet41.com:443
www.sexviet41.com:2053
www.sexviet41.com:2083
www.sexviet41.com:2087
www.sexviet41.com:2096
www.sexviet41.com:8443
iloveyou.sexviet41.com:80
iloveyou.sexviet41.com:22
iloveyou.sexviet41.com:8080
iloveyou.sexviet41.com:8880
iloveyou.sexviet41.com:2052
iloveyou.sexviet41.com:2082
iloveyou.sexviet41.com:2086
iloveyou.sexviet41.com:2095
iloveyou.sexviet41.com:443
iloveyou.sexviet41.com:2053
iloveyou.sexviet41.com:2083
iloveyou.sexviet41.com:2087
iloveyou.sexviet41.com:2096
iloveyou.sexviet41.com:8443
client.sexviet41.com:80
client.sexviet41.com:22
client.sexviet41.com:8080
client.sexviet41.com:8880
client.sexviet41.com:2052
client.sexviet41.com:2082
client.sexviet41.com:2086
client.sexviet41.com:2095
client.sexviet41.com:443
client.sexviet41.com:2053
client.sexviet41.com:2083
client.sexviet41.com:2087
client.sexviet41.com:2096
client.sexviet41.com:8443

Mutex

EcI8ZyMi360d

Attributes

delay
0
install
true
install_file
x41y4td.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/0x0003000000000432-10.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
3808	x41y4td.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
3352	cmd.exe
5736	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	x41y4td.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4156	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
4212	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 936 wrote to memory of 3352	936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe	89
PID 936 wrote to memory of 5736	936	03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe	91
PID 3352 wrote to memory of 4212	3352	cmd.exe	93
PID 5736 wrote to memory of 4156	5736	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe
"C:\Users\Admin\AppData\Local\Temp\03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:936
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "x41y4td" /tr '"C:\Users\Admin\AppData\Roaming\x41y4td.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3352
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "x41y4td" /tr '"C:\Users\Admin\AppData\Roaming\x41y4td.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4212
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6E7F.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5736
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4156
- - C:\Users\Admin\AppData\Roaming\x41y4td.exe
    "C:\Users\Admin\AppData\Roaming\x41y4td.exe"
    3⤵
    PID:2128

C:\Users\Admin\AppData\Roaming\x41y4td.exe
"C:\Users\Admin\AppData\Roaming\x41y4td.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3808

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

tmp6E7F.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp6E7F.tmp.bat
Size 151B
SHA256 62c0de7781a24fc4db343c407d32e91cb2768f259d6c16ac41b93eacfd81dfc7
MD5 b1088ec77d1012895a5b7ba791646c76
SHA1 49d9b3dca1f22ff582defcd4f54a003fd155fc24
SHA512 5a1af175776c47e296a257a56ed8b6c38142a4f52edcd9d305a07654f406dea0b71f11e6aa70a329e38d44c82937b7141b2d558fe90c20d26472cc31ca7c842a
TLSH
T175C02B4355C5FA0E680DB42307FFD5CC91726C593F80BF00D748448D128098DF4DA342
MD5 SHA1 SHA512 TLSH

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x41y4td.exe

Path C:\Users\Admin\AppData\Roaming\x41y4td.exe
Size 45KB
SHA256 03a77b0a191e5ba683f99f02b04fad2d3926faf934a01177b3a97bc2e0551ddf
MD5 9a5e3aeeaf6c17c6184e4306fbfc99bc
SHA1 5e32f58296bfe3e691ab8441b03e00c5bb40be6a
SHA512 e5e59ab3a2828b106021a397bd279cbc1ba885d5b851e28e54b9c8cc210c685d8bff0559a363d6a7b38c8a7a25e9b2c58a555d0db511854ae18ce8798eec140e
SSDEEP 768:5uSy6pTpwrSWWUE3/WImo2qNfQ6vincPI9xjbGgX3i0nlIQ9iDT4mBDZ0x:5uSy6pTpoo2pKU9hbZXS0nlNc0od0x
TLSH
T13A232A0037E9C12BF2BE5F789DF26105467AF2633A03D68A1CC4119B5613BC69A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/936-0-0x0000000074A12000-0x0000000074A13000-memory.dmp

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memory/936-1-0x0000000000370000-0x0000000000382000-memory.dmp

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memory/936-2-0x0000000074A00000-0x00000000751BC000-memory.dmp

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memory/936-3-0x0000000004D70000-0x0000000004E0C000-memory.dmp

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memory/936-8-0x0000000074A00000-0x00000000751BC000-memory.dmp

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memory/3808-12-0x0000000074A00000-0x00000000751BC000-memory.dmp

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memory/3808-14-0x0000000074A00000-0x00000000751BC000-memory.dmp

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