asyncrat | d73dedb26f49ad51cf47c90575442f0f76b0254b584c2e5eae4af96983f1e233

Analysis

max time kernel
148s
max time network
151s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/08/2026, 08:13

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General

Target
AsyncRAT.exe
Size 56KB
Sample260810-j4e73ayxey
SHA256 d73dedb26f49ad51cf47c90575442f0f76b0254b584c2e5eae4af96983f1e233
MD5 7ce4b15dae01940df347e3d9ef1788de
SHA1 2e165c2c1d8e898b45c341e8619553ea5420aa9b
SHA512 0535f5515af9b989d9950b2e6c878c2ecf2288efbb53178446a62a0d1006dea59130cb0cdc46660eeedbd5a0bd73befe2f4106aa454c2d8cb0357d575e19f64a
SSDEEP 1536:2uf09TH2w240YikbeXSU2rxNyJa9qdNkejNUHLTq:2ufoTH2w2pYikbeHexNqDkINmq
TLSH
T1DF436C003BE9813AF2BE4FB8ACF22145467AE2736603D55D2CC4519B5B23BC5DA426FD
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

fb88.uno:443
fb88.uno:8848
fb88.uno:8080

Mutex

kBVPjakHQ19X

Attributes

delay
3
install
true
install_file
AsyncRat.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/0x000e00000001c4f4-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
4956	AsyncRat.exe
2232	AsyncRat.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
760	cmd.exe
3268	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	AsyncRAT.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	AsyncRat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRat.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4656	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
764	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe
2200	AsyncRAT.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2200	AsyncRAT.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 760	2200	AsyncRAT.exe	89
PID 2200 wrote to memory of 3268	2200	AsyncRAT.exe	91
PID 760 wrote to memory of 764	760	cmd.exe	93
PID 3268 wrote to memory of 4656	3268	cmd.exe	94
PID 3268 wrote to memory of 2232	3268	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\AsyncRAT.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncRAT.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:760
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:764
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3C44.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3268
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4656
- - C:\Users\Admin\AppData\Roaming\AsyncRat.exe
    "C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2232

C:\Users\Admin\AppData\Roaming\AsyncRat.exe
"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4956

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

tmp3C44.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3C44.tmp.bat
Size 152B
SHA256 a1027a76c33a5f30bacf3b922225b75faf18344c8cad9e2c3dc0c5cc5f743edf
MD5 d9547350eb96ca0ee8f1085c06e98e7b
SHA1 9ba04e8a99192214e2797cc24cfa42a86383b607
SHA512 c6cb7bf9970b45f2d8d49fe4944858a07ffd627d717f7f8e6dc5879fcdb880657ee8d3aa34b49dc0592ad1b65c7f4556e6341e4aa0b9f043d2643a7ed1f111c8
TLSH
T1BCC02B66A2C5EB5F2D05342313FADC9C95767C593F40BB40C30844AE228194CF0F9341
MD5 SHA1 SHA512 TLSH

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AsyncRat.exe

Path C:\Users\Admin\AppData\Roaming\AsyncRat.exe
Size 56KB
SHA256 d73dedb26f49ad51cf47c90575442f0f76b0254b584c2e5eae4af96983f1e233
MD5 7ce4b15dae01940df347e3d9ef1788de
SHA1 2e165c2c1d8e898b45c341e8619553ea5420aa9b
SHA512 0535f5515af9b989d9950b2e6c878c2ecf2288efbb53178446a62a0d1006dea59130cb0cdc46660eeedbd5a0bd73befe2f4106aa454c2d8cb0357d575e19f64a
SSDEEP 1536:2uf09TH2w240YikbeXSU2rxNyJa9qdNkejNUHLTq:2ufoTH2w2pYikbeHexNqDkINmq
TLSH
T1DF436C003BE9813AF2BE4FB8ACF22145467AE2736603D55D2CC4519B5B23BC5DA426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2200-0-0x0000000074ED2000-0x0000000074ED3000-memory.dmp

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memory/2200-1-0x0000000000B40000-0x0000000000B54000-memory.dmp

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memory/2200-2-0x0000000074EC0000-0x000000007567C000-memory.dmp

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memory/2200-3-0x0000000005510000-0x00000000055AC000-memory.dmp

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memory/2200-8-0x0000000074EC0000-0x000000007567C000-memory.dmp

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memory/4956-12-0x0000000074EB0000-0x000000007566C000-memory.dmp

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memory/4956-14-0x0000000074EB0000-0x000000007566C000-memory.dmp

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