asyncrat | c330d9782ed0abf0bdc1eaa72181357f20ce793e6fbc72ab61879955a6e07990

Analysis

max time kernel
148s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
28/07/2026, 03:58

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General

Target
gayy.exe
Size 47KB
Sample260728-ejmn7aeg97
SHA256 c330d9782ed0abf0bdc1eaa72181357f20ce793e6fbc72ab61879955a6e07990
MD5 119a0e6fce417fed78dfadabe2c01a71
SHA1 1d0964fb62c2f2717b9db8a3c8d1af362780a43d
SHA512 f072f4af81f913f308960b33ad035fee4921499e86db668217f324b7f9d75a76b776968926df0a9e464c6740cc1594ab86182c90ee33579076da7fa8354a9005
SSDEEP 768:guISdTYEXlTWU/+qhmo2qb0KTDbVgbp7hvQPIqeZG0bPFe6APEl/NzeJ8uc2KiNt:guISdTYUN2KzV2xqeZJbP5Asl/Nzuc2x
TLSH
T193231B003BE9C23BF2BE4F7498F22245857AF2677602E65D2CC451D75A23BC296429FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

789win.thaichi.co:6606
789win.thaichi.co:80
789win.thaichi.co:8080
789win.thaichi.co:443
789win.thaichi.co:8443
789win.thaichi.co:22
789win.thaichi.co:23
thaichi.co:6606
thaichi.co:80
thaichi.co:8080
thaichi.co:443
thaichi.co:8443
thaichi.co:22
thaichi.co:23

Mutex

py3xbI6KkYsA

Attributes

delay
3
install
true
install_file
GoogleUpdate.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/0x00030000000170b9-11.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3436	GoogleUpdate.exe
1972	GoogleUpdate.exe

Outbound SSH connection to public host 2 TTPs 1 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc
SSH destination	22	172.67.218.173:22

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
1652	cmd.exe
2788	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	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	GoogleUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GoogleUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gayy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5652	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
4944	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe
3292	gayy.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3292	gayy.exe
Token: SeDebugPrivilege	3436	GoogleUpdate.exe
Token: SeDebugPrivilege	3436	GoogleUpdate.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3292 wrote to memory of 1652	3292	gayy.exe	90
PID 3292 wrote to memory of 2788	3292	gayy.exe	92
PID 1652 wrote to memory of 4944	1652	cmd.exe	94
PID 2788 wrote to memory of 5652	2788	cmd.exe	95
PID 2788 wrote to memory of 1972	2788	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\gayy.exe
"C:\Users\Admin\AppData\Local\Temp\gayy.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3292
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "GoogleUpdate" /tr '"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1652
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "GoogleUpdate" /tr '"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4944
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7768.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2788
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5652
- - C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
    "C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1972

C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3436

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

Network Service Discovery

T1046

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

T1572

Exfiltration

Impact

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Downloads

tmp7768.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7768.tmp.bat
Size 156B
SHA256 4c9cb43704fe75375748ff086379da8276939bb4ea05b5f9be7c0bf1238f3868
MD5 8af4ffb3d82f23e312165794853bc250
SHA1 2e2dbd9ba3cf1fe25348bc24de748ee610bb61ec
SHA512 ea2d61d7c50139e4e41bdf041c59ccfbe5e856a8a8177a6e875093e41ac262f839cde5906df6fec9ebdfbb9bcecb8bdaa68549ec7f022e7b5705fc074e6b0ffe
TLSH
T1E3C08C5361C9EA1E3805A81712BBD68DA1A268993E44AB10830840192680888E8E9682
MD5 SHA1 SHA512 TLSH

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GoogleUpdate.exe

Path C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
Size 47KB
SHA256 c330d9782ed0abf0bdc1eaa72181357f20ce793e6fbc72ab61879955a6e07990
MD5 119a0e6fce417fed78dfadabe2c01a71
SHA1 1d0964fb62c2f2717b9db8a3c8d1af362780a43d
SHA512 f072f4af81f913f308960b33ad035fee4921499e86db668217f324b7f9d75a76b776968926df0a9e464c6740cc1594ab86182c90ee33579076da7fa8354a9005
SSDEEP 768:guISdTYEXlTWU/+qhmo2qb0KTDbVgbp7hvQPIqeZG0bPFe6APEl/NzeJ8uc2KiNt:guISdTYUN2KzV2xqeZJbP5Asl/Nzuc2x
TLSH
T193231B003BE9C23BF2BE4F7498F22245857AF2677602E65D2CC451D75A23BC296429FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3292-0-0x00000000748A2000-0x00000000748A3000-memory.dmp

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memory/3292-1-0x0000000000F90000-0x0000000000FA2000-memory.dmp

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memory/3292-2-0x0000000074890000-0x000000007504C000-memory.dmp

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memory/3292-3-0x0000000005910000-0x0000000005976000-memory.dmp

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memory/3292-4-0x0000000005DD0000-0x0000000005E6C000-memory.dmp

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memory/3292-9-0x0000000074890000-0x000000007504C000-memory.dmp

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memory/3436-13-0x00000000746C0000-0x0000000074E7C000-memory.dmp

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memory/3436-15-0x00000000746C0000-0x0000000074E7C000-memory.dmp

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