asyncrat | 8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525

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
04/08/2026, 13:58

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General

Target
8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
Size 45KB
Sample260804-raba1sscka
SHA256 8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525
MD5 e09f4c1299f60fc04cfc32af36a4e929
SHA1 a445b18a771197945edd7fdfbb5fea81a2fba058
SHA512 ab04c5e216d668ae1060d656ed746f7a787a5216b659d63d1d4403766a4d79d5d39c2dfc2bbd4985350ada21cbdd7a5564d56d18f78192293acb8a35d445d032
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q12OjusyQowsPIHzjb8gX3yUVUXmhAMBDZUx:cuR0JTPjY2vOjuxZwRH3bTXCfwdUx
TLSH
T16E233B0037E9812BF2BE4F78ADF26145867AF6632603E54D1CC451DB5613FC68A42AFE
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

fimsexvietnam.com:80
fimsexvietnam.com:22
fimsexvietnam.com:8080
fimsexvietnam.com:8880
fimsexvietnam.com:2052
fimsexvietnam.com:2082
fimsexvietnam.com:2086
fimsexvietnam.com:2095
fimsexvietnam.com:443
fimsexvietnam.com:2053
fimsexvietnam.com:2083
fimsexvietnam.com:2087
fimsexvietnam.com:2096
fimsexvietnam.com:8443
www.fimsexvietnam.com:80
www.fimsexvietnam.com:22
www.fimsexvietnam.com:8080
www.fimsexvietnam.com:8880
www.fimsexvietnam.com:2052
www.fimsexvietnam.com:2082
www.fimsexvietnam.com:2086
www.fimsexvietnam.com:2095
www.fimsexvietnam.com:443
www.fimsexvietnam.com:2053
www.fimsexvietnam.com:2083
www.fimsexvietnam.com:2087
www.fimsexvietnam.com:2096
www.fimsexvietnam.com:8443
nanocore.fimsexvietnam.com:80
nanocore.fimsexvietnam.com:22
nanocore.fimsexvietnam.com:8080
nanocore.fimsexvietnam.com:8880
nanocore.fimsexvietnam.com:2052
nanocore.fimsexvietnam.com:2082
nanocore.fimsexvietnam.com:2086
nanocore.fimsexvietnam.com:2095
nanocore.fimsexvietnam.com:443
nanocore.fimsexvietnam.com:2053
nanocore.fimsexvietnam.com:2083
nanocore.fimsexvietnam.com:2087
nanocore.fimsexvietnam.com:2096
nanocore.fimsexvietnam.com:8443
hacker.fimsexvietnam.com:80
hacker.fimsexvietnam.com:22
hacker.fimsexvietnam.com:8080
hacker.fimsexvietnam.com:8880
hacker.fimsexvietnam.com:2052
hacker.fimsexvietnam.com:2082
hacker.fimsexvietnam.com:2086
hacker.fimsexvietnam.com:2095
hacker.fimsexvietnam.com:443
hacker.fimsexvietnam.com:2053
hacker.fimsexvietnam.com:2083
hacker.fimsexvietnam.com:2087
hacker.fimsexvietnam.com:2096
hacker.fimsexvietnam.com:8443

Mutex

r865Flw9HyOg

Attributes

delay
0
install
true
install_file
7rsr.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/0x0003000000008f19-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3312	7rsr.exe
4140	7rsr.exe

Outbound SSH connection to public host 2 TTPs 4 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	10	104.21.36.7:22
SSH destination	11	172.67.182.173:22
SSH destination	15	104.21.36.7:22
SSH destination	16	172.67.182.173:22

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
4492	cmd.exe
2516	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	7rsr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7rsr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5076	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
4844	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
Token: SeDebugPrivilege	3312	7rsr.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1140 wrote to memory of 4492	1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe	89
PID 1140 wrote to memory of 2516	1140	8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe	91
PID 4492 wrote to memory of 4844	4492	cmd.exe	93
PID 2516 wrote to memory of 5076	2516	cmd.exe	94
PID 2516 wrote to memory of 4140	2516	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe
"C:\Users\Admin\AppData\Local\Temp\8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1140
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "7rsr" /tr '"C:\Users\Admin\AppData\Roaming\7rsr.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4492
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "7rsr" /tr '"C:\Users\Admin\AppData\Roaming\7rsr.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4844
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5DC6.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2516
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5076
- - C:\Users\Admin\AppData\Roaming\7rsr.exe
    "C:\Users\Admin\AppData\Roaming\7rsr.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4140

C:\Users\Admin\AppData\Roaming\7rsr.exe
"C:\Users\Admin\AppData\Roaming\7rsr.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3312

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

tmp5DC6.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5DC6.tmp.bat
Size 148B
SHA256 b4f073b186f2aa6a0a0d02e39b8b9e09c749a7ec69d985809ceb869f0053aa29
MD5 b74181b6fe307eac88ace5714fb4ce2e
SHA1 2114734b416ef50a47c8353a05b9951981b50f7c
SHA512 9353c3f454e0a26b4b441132e222cfa3c1a6a3865b51117da4859fbdc11e344ccaa62ed218207119031a272b30ebcba7f4683329d7c450bf3d7e704b2c781fc2
TLSH
T1C5C02B4291C5EA0E3805341702FADAEC91B26C1F3F84FF80C304400E12C084CF0DDB42
MD5 SHA1 SHA512 TLSH

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7rsr.exe

Path C:\Users\Admin\AppData\Roaming\7rsr.exe
Size 45KB
SHA256 8adf5ec4312a4d722a2cac8edc9f7a5589f07c0792834f9d8278236cedd9f525
MD5 e09f4c1299f60fc04cfc32af36a4e929
SHA1 a445b18a771197945edd7fdfbb5fea81a2fba058
SHA512 ab04c5e216d668ae1060d656ed746f7a787a5216b659d63d1d4403766a4d79d5d39c2dfc2bbd4985350ada21cbdd7a5564d56d18f78192293acb8a35d445d032
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q12OjusyQowsPIHzjb8gX3yUVUXmhAMBDZUx:cuR0JTPjY2vOjuxZwRH3bTXCfwdUx
TLSH
T16E233B0037E9812BF2BE4F78ADF26145867AF6632603E54D1CC451DB5613FC68A42AFE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1140-0-0x0000000074D02000-0x0000000074D03000-memory.dmp

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memory/1140-1-0x0000000000BD0000-0x0000000000BE2000-memory.dmp

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memory/1140-2-0x0000000074CF0000-0x00000000754AC000-memory.dmp

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memory/1140-3-0x0000000005720000-0x00000000057BC000-memory.dmp

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memory/1140-8-0x0000000074CF0000-0x00000000754AC000-memory.dmp

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memory/3312-12-0x0000000074C90000-0x000000007544C000-memory.dmp

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memory/3312-14-0x0000000074C90000-0x000000007544C000-memory.dmp

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