asyncrat | 37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9

Analysis

max time kernel
148s
max time network
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
16/08/2026, 07:29

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General

Target
37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
Size 45KB
Sample260816-ja9jtabh65
SHA256 37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9
MD5 1bd7bbbcfe3082f9f1d238e38757ebdc
SHA1 4d7011fde9f0d6e2ea0e8d333ea986993be7c699
SHA512 e52b3de3e19c31a1f84831a9ba721bbb1422a41f92da440928bc4f448027ad3877fad897a61e4b0771c40affea48dbb2351cb9b5c315bdff80c08924464906f2
SSDEEP 768:cuq04JTLcsP8EWUmOTymo2qAO8V1RpPEcPIMzjb0gX3iNwVjytKHoQhUYJmCBDZW:cuqNJTLr62e8VDZEhM3bbXSyjyEHoEUF
TLSH
T1A423290037E8822BF2BE4F7899F26146867AF6632603D54D1CC452DB5713FC69A426FE
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

e.streamforester.name:80
e.streamforester.name:22
e.streamforester.name:8080
e.streamforester.name:8880
e.streamforester.name:2052
e.streamforester.name:2082
e.streamforester.name:2086
e.streamforester.name:2095
e.streamforester.name:443
e.streamforester.name:2053
e.streamforester.name:2083
e.streamforester.name:2087
e.streamforester.name:2096
e.streamforester.name:8443
www.e.streamforester.name:80
www.e.streamforester.name:22
www.e.streamforester.name:8080
www.e.streamforester.name:8880
www.e.streamforester.name:2052
www.e.streamforester.name:2082
www.e.streamforester.name:2086
www.e.streamforester.name:2095
www.e.streamforester.name:443
www.e.streamforester.name:2053
www.e.streamforester.name:2083
www.e.streamforester.name:2087
www.e.streamforester.name:2096
www.e.streamforester.name:8443
blaster.e.streamforester.name:80
blaster.e.streamforester.name:22
blaster.e.streamforester.name:8080
blaster.e.streamforester.name:8880
blaster.e.streamforester.name:2052
blaster.e.streamforester.name:2082
blaster.e.streamforester.name:2086
blaster.e.streamforester.name:2095
blaster.e.streamforester.name:443
blaster.e.streamforester.name:2053
blaster.e.streamforester.name:2083
blaster.e.streamforester.name:2087
blaster.e.streamforester.name:2096
blaster.e.streamforester.name:8443
conficker.e.streamforester.name:80
conficker.e.streamforester.name:22
conficker.e.streamforester.name:8080
conficker.e.streamforester.name:8880
conficker.e.streamforester.name:2052
conficker.e.streamforester.name:2082
conficker.e.streamforester.name:2086
conficker.e.streamforester.name:2095
conficker.e.streamforester.name:443
conficker.e.streamforester.name:2053
conficker.e.streamforester.name:2083
conficker.e.streamforester.name:2087
conficker.e.streamforester.name:2096
conficker.e.streamforester.name:8443
stuxnet.e.streamforester.name:80
stuxnet.e.streamforester.name:22
stuxnet.e.streamforester.name:8080
stuxnet.e.streamforester.name:8880
stuxnet.e.streamforester.name:2052
stuxnet.e.streamforester.name:2082
stuxnet.e.streamforester.name:2086
stuxnet.e.streamforester.name:2095
stuxnet.e.streamforester.name:443
stuxnet.e.streamforester.name:2053
stuxnet.e.streamforester.name:2083
stuxnet.e.streamforester.name:2087
stuxnet.e.streamforester.name:2096
stuxnet.e.streamforester.name:8443

Mutex

Fx6cYJ4mrQjv

Attributes

delay
0
install
true
install_file
b8iu.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/0x0005000000016b3f-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5060	b8iu.exe
4744	b8iu.exe

Outbound SSH connection to public host 2 TTPs 3 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	13	104.26.4.5:22
SSH destination	14	104.26.5.5:22
SSH destination	16	172.67.70.147:22

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
3476	cmd.exe
620	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	b8iu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b8iu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3124	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
3188	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
Token: SeDebugPrivilege	5060	b8iu.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5832 wrote to memory of 3476	5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe	90
PID 5832 wrote to memory of 620	5832	37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe	92
PID 3476 wrote to memory of 3188	3476	cmd.exe	94
PID 620 wrote to memory of 3124	620	cmd.exe	95
PID 620 wrote to memory of 4744	620	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe
"C:\Users\Admin\AppData\Local\Temp\37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5832
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "b8iu" /tr '"C:\Users\Admin\AppData\Roaming\b8iu.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3476
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "b8iu" /tr '"C:\Users\Admin\AppData\Roaming\b8iu.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3188
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9234.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:620
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3124
- - C:\Users\Admin\AppData\Roaming\b8iu.exe
    "C:\Users\Admin\AppData\Roaming\b8iu.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4744

C:\Users\Admin\AppData\Roaming\b8iu.exe
"C:\Users\Admin\AppData\Roaming\b8iu.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5060

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

tmp9234.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp9234.tmp.bat
Size 148B
SHA256 927b33e7e81c6e6c7b96e221567d1985906b8da229767a17e392d15b16bc1b76
MD5 ca6e346222957375c6f79746d0125589
SHA1 b6aafbe903c4aeb173f873ef8beb1e93a83543cf
SHA512 d3438bf4e8937909789138be5acc33fa6b2e7f5eb40e3fe21cc2d84d63818277c48e6994c75bcef67b42c5f1cda07b11f5a83ea642d95278d9a746c9dcbbab2f
TLSH
T1AFC02B4691C5EA8E6805542303FED48C9177BC293F44BB10C304800F528044CF4E9381
MD5 SHA1 SHA512 TLSH

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b8iu.exe

Path C:\Users\Admin\AppData\Roaming\b8iu.exe
Size 45KB
SHA256 37ed961f57ffd9a4dc45fed21109e42375d7466a6c979690f36a570a67cd55d9
MD5 1bd7bbbcfe3082f9f1d238e38757ebdc
SHA1 4d7011fde9f0d6e2ea0e8d333ea986993be7c699
SHA512 e52b3de3e19c31a1f84831a9ba721bbb1422a41f92da440928bc4f448027ad3877fad897a61e4b0771c40affea48dbb2351cb9b5c315bdff80c08924464906f2
SSDEEP 768:cuq04JTLcsP8EWUmOTymo2qAO8V1RpPEcPIMzjb0gX3iNwVjytKHoQhUYJmCBDZW:cuqNJTLr62e8VDZEhM3bbXSyjyEHoEUF
TLSH
T1A423290037E8822BF2BE4F7899F26146867AF6632603D54D1CC452DB5713FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/5060-12-0x00000000744A2000-0x00000000744A3000-memory.dmp

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memory/5060-14-0x00000000744A2000-0x00000000744A3000-memory.dmp

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memory/5832-0-0x0000000074C82000-0x0000000074C83000-memory.dmp

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memory/5832-1-0x0000000000680000-0x0000000000692000-memory.dmp

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memory/5832-2-0x0000000074C70000-0x000000007542C000-memory.dmp

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memory/5832-3-0x0000000002CF0000-0x0000000002D8C000-memory.dmp

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memory/5832-8-0x0000000074C70000-0x000000007542C000-memory.dmp

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