asyncrat | 137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370

Analysis

max time kernel
148s
max time network
151s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/08/2026, 18:48

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General

Target
137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
Size 45KB
Sample260804-xftbnsck7t
SHA256 137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370
MD5 cda7919431be344381f23be9c4dce08b
SHA1 d6885ebc056101260bf7a8f07d86dda913bfe14c
SHA512 6d9d6fa7bf827ec226455b24a85903c113a3f5e9a7c8a3ebc928bfe8d95bbcc3e64d752efd3b8f34004dee50a44461689cae01fa3e48e8f2e18d99a3917dfc67
SSDEEP 768:4uBfJTMUyYUWUWBDimo2qV98V1RpPEcPIMzjbmgX3iywZzXMfkQBDZbx:4uBfJTMpv2O8VDZEhM3b5XSywNXkkGdV
TLSH
T130233B003BE8822BF2BE4FB89DF26145467AF2676603D54E1CC451DB5613FC68A426FE
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

sex18.me:80
sex18.me:22
sex18.me:8080
sex18.me:8880
sex18.me:2052
sex18.me:2082
sex18.me:2086
sex18.me:2095
sex18.me:443
sex18.me:2053
sex18.me:2083
sex18.me:2087
sex18.me:2096
sex18.me:8443
www.sex18.me:80
www.sex18.me:22
www.sex18.me:8080
www.sex18.me:8880
www.sex18.me:2052
www.sex18.me:2082
www.sex18.me:2086
www.sex18.me:2095
www.sex18.me:443
www.sex18.me:2053
www.sex18.me:2083
www.sex18.me:2087
www.sex18.me:2096
www.sex18.me:8443
cl0p.sex18.me:80
cl0p.sex18.me:22
cl0p.sex18.me:8080
cl0p.sex18.me:8880
cl0p.sex18.me:2052
cl0p.sex18.me:2082
cl0p.sex18.me:2086
cl0p.sex18.me:2095
cl0p.sex18.me:443
cl0p.sex18.me:2053
cl0p.sex18.me:2083
cl0p.sex18.me:2087
cl0p.sex18.me:2096
cl0p.sex18.me:8443
ryuk.sex18.me:80
ryuk.sex18.me:22
ryuk.sex18.me:8080
ryuk.sex18.me:8880
ryuk.sex18.me:2052
ryuk.sex18.me:2082
ryuk.sex18.me:2086
ryuk.sex18.me:2095
ryuk.sex18.me:443
ryuk.sex18.me:2053
ryuk.sex18.me:2083
ryuk.sex18.me:2087
ryuk.sex18.me:2096
ryuk.sex18.me:8443

Mutex

Lta4omf9On3K

Attributes

delay
0
install
true
install_file
y7uu.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/0x000e00000001c3db-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2904	y7uu.exe
1520	y7uu.exe

Outbound SSH connection to public host 2 TTPs 2 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	pid	Process
SSH destination	7	69.48.229.117:22	2904	y7uu.exe
SSH destination	10	69.48.229.117:22		Process not Found

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
4220	cmd.exe
2632	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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	y7uu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	y7uu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2596	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
1924	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
Token: SeDebugPrivilege	2904	y7uu.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5940 wrote to memory of 4220	5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe	89
PID 5940 wrote to memory of 2632	5940	137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe	91
PID 4220 wrote to memory of 1924	4220	cmd.exe	93
PID 2632 wrote to memory of 2596	2632	cmd.exe	94
PID 2632 wrote to memory of 1520	2632	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe
"C:\Users\Admin\AppData\Local\Temp\137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5940
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "y7uu" /tr '"C:\Users\Admin\AppData\Roaming\y7uu.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4220
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "y7uu" /tr '"C:\Users\Admin\AppData\Roaming\y7uu.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1924
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3DBB.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2632
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2596
- - C:\Users\Admin\AppData\Roaming\y7uu.exe
    "C:\Users\Admin\AppData\Roaming\y7uu.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1520

C:\Users\Admin\AppData\Roaming\y7uu.exe
"C:\Users\Admin\AppData\Roaming\y7uu.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2904

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

tmp3DBB.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3DBB.tmp.bat
Size 148B
SHA256 d3ef31eaac805cd511473cbcf037a5263f046a6e4a271b807d6a95a82d0d7373
MD5 c31e2832d856844397245c5b5d7d7039
SHA1 fc39d78e6dcb5233213b8c4d2f288c135a02b63b
SHA512 0da91f703846937b19f2c0525f9ae8cbab148548305a88a1c6ddde5698ac5a6432bc17b6df5f5396218972289d8e56b81b08ffc778e051b881573383bf54d7d7
TLSH
T180C02B4251C9FA4E2D09145303FEE48C91736C2D3F84BB00C388814DA28188CF0D9385
MD5 SHA1 SHA512 TLSH

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y7uu.exe

Path C:\Users\Admin\AppData\Roaming\y7uu.exe
Size 45KB
SHA256 137821c445ffc729b9b4a5a5b32543f4cfce2b1a659782cb61404a4234f96370
MD5 cda7919431be344381f23be9c4dce08b
SHA1 d6885ebc056101260bf7a8f07d86dda913bfe14c
SHA512 6d9d6fa7bf827ec226455b24a85903c113a3f5e9a7c8a3ebc928bfe8d95bbcc3e64d752efd3b8f34004dee50a44461689cae01fa3e48e8f2e18d99a3917dfc67
SSDEEP 768:4uBfJTMUyYUWUWBDimo2qV98V1RpPEcPIMzjbmgX3iywZzXMfkQBDZbx:4uBfJTMpv2O8VDZEhM3b5XSywNXkkGdV
TLSH
T130233B003BE8822BF2BE4FB89DF26145467AF2676603D54E1CC451DB5613FC68A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2904-12-0x0000000074FF0000-0x00000000757AC000-memory.dmp

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memory/2904-14-0x0000000074FF0000-0x00000000757AC000-memory.dmp

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memory/5940-0-0x0000000075062000-0x0000000075063000-memory.dmp

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memory/5940-1-0x0000000000F50000-0x0000000000F62000-memory.dmp

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memory/5940-2-0x0000000075050000-0x000000007580C000-memory.dmp

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memory/5940-3-0x0000000005A50000-0x0000000005AEC000-memory.dmp

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memory/5940-8-0x0000000075050000-0x000000007580C000-memory.dmp

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