asyncrat | 3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3

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
16/08/2026, 14:28

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General

Target
3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
Size 45KB
Sample260816-rtbqwszejf
SHA256 3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3
MD5 4622089540af5d25b1cabcd473c1c548
SHA1 6dc340583271dfdd1a87462a6fcf5759b572da4a
SHA512 cce5fdb3fe76f2fb3e2fea8517ebaf82fc70251c1bab99ddc9a667d98a57ce0cbaeadb630c25160f41261883b7a7c5c8de8bd0b7e0313f2952e8605db1388cde
SSDEEP 768:cuqb5TrIGuCWUoKXMmo2qQGseXusMkFX8vnPIMvzjbrgX3zrjSjW7BhtUxBDZUx:cuqb5TrhG2VeB1FXiAMv3bUXjrSW7tUc
TLSH
T1CC2319003BE8812BF2BE4FB859F26145867AF6632603D54E1CC4519B4723FC6CA526FE
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

streamforester.name:80
streamforester.name:22
streamforester.name:8080
streamforester.name:8880
streamforester.name:2052
streamforester.name:2082
streamforester.name:2086
streamforester.name:2095
streamforester.name:443
streamforester.name:2053
streamforester.name:2083
streamforester.name:2087
streamforester.name:2096
streamforester.name:8443
www.streamforester.name:80
www.streamforester.name:22
www.streamforester.name:8080
www.streamforester.name:8880
www.streamforester.name:2052
www.streamforester.name:2082
www.streamforester.name:2086
www.streamforester.name:2095
www.streamforester.name:443
www.streamforester.name:2053
www.streamforester.name:2083
www.streamforester.name:2087
www.streamforester.name:2096
www.streamforester.name:8443
darkside.streamforester.name:80
darkside.streamforester.name:22
darkside.streamforester.name:8080
darkside.streamforester.name:8880
darkside.streamforester.name:2052
darkside.streamforester.name:2082
darkside.streamforester.name:2086
darkside.streamforester.name:2095
darkside.streamforester.name:443
darkside.streamforester.name:2053
darkside.streamforester.name:2083
darkside.streamforester.name:2087
darkside.streamforester.name:2096
darkside.streamforester.name:8443
cryptolocker.streamforester.name:80
cryptolocker.streamforester.name:22
cryptolocker.streamforester.name:8080
cryptolocker.streamforester.name:8880
cryptolocker.streamforester.name:2052
cryptolocker.streamforester.name:2082
cryptolocker.streamforester.name:2086
cryptolocker.streamforester.name:2095
cryptolocker.streamforester.name:443
cryptolocker.streamforester.name:2053
cryptolocker.streamforester.name:2083
cryptolocker.streamforester.name:2087
cryptolocker.streamforester.name:2096
cryptolocker.streamforester.name:8443
client.streamforester.name:80
client.streamforester.name:22
client.streamforester.name:8080
client.streamforester.name:8880
client.streamforester.name:2052
client.streamforester.name:2082
client.streamforester.name:2086
client.streamforester.name:2095
client.streamforester.name:443
client.streamforester.name:2053
client.streamforester.name:2083
client.streamforester.name:2087
client.streamforester.name:2096
client.streamforester.name:8443

Mutex

qLKieUdPbKR1

Attributes

delay
0
install
true
install_file
u2l8t.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/0x000e00000001c545-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3136	u2l8t.exe
4764	u2l8t.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
6048	cmd.exe
3500	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	u2l8t.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.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	u2l8t.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1340	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
6096	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
Token: SeDebugPrivilege	3136	u2l8t.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3856 wrote to memory of 6048	3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe	89
PID 3856 wrote to memory of 3500	3856	3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe	91
PID 6048 wrote to memory of 6096	6048	cmd.exe	93
PID 3500 wrote to memory of 1340	3500	cmd.exe	94
PID 3500 wrote to memory of 4764	3500	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe
"C:\Users\Admin\AppData\Local\Temp\3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3856
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "u2l8t" /tr '"C:\Users\Admin\AppData\Roaming\u2l8t.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6048
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "u2l8t" /tr '"C:\Users\Admin\AppData\Roaming\u2l8t.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:6096
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp360A.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3500
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1340
- - C:\Users\Admin\AppData\Roaming\u2l8t.exe
    "C:\Users\Admin\AppData\Roaming\u2l8t.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4764

C:\Users\Admin\AppData\Roaming\u2l8t.exe
"C:\Users\Admin\AppData\Roaming\u2l8t.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3136

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

tmp360A.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp360A.tmp.bat
Size 149B
SHA256 bc23b1f717b1f67e052ff35661f34930e38b44a95123324ead2ee202fe239e2b
MD5 517ee3b9a49505c4c0a3fa939bc6c4f1
SHA1 d771a65746ed5a9e842136282fed8a039381f07a
SHA512 20d7bb27b187c019b26213e10415f1b8c3c739a2ae191f45e6dd815869d52d763b43e1126127ee23e068aafe52def34807f5dc68bf679b8b89aaec86e0e3c48e
TLSH
T152C02B4351C5EA1E2C05541302FFE59C91B66C193F40BB40C344405E328084CF0D93C1
MD5 SHA1 SHA512 TLSH

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u2l8t.exe

Path C:\Users\Admin\AppData\Roaming\u2l8t.exe
Size 45KB
SHA256 3741adaa95a51dbdf1cd13124ee2d08d6068b7c975c0498f3f42196703cf94a3
MD5 4622089540af5d25b1cabcd473c1c548
SHA1 6dc340583271dfdd1a87462a6fcf5759b572da4a
SHA512 cce5fdb3fe76f2fb3e2fea8517ebaf82fc70251c1bab99ddc9a667d98a57ce0cbaeadb630c25160f41261883b7a7c5c8de8bd0b7e0313f2952e8605db1388cde
SSDEEP 768:cuqb5TrIGuCWUoKXMmo2qQGseXusMkFX8vnPIMvzjbrgX3zrjSjW7BhtUxBDZUx:cuqb5TrhG2VeB1FXiAMv3bUXjrSW7tUc
TLSH
T1CC2319003BE8812BF2BE4FB859F26145867AF6632603D54E1CC4519B4723FC6CA526FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3136-12-0x0000000075050000-0x000000007580C000-memory.dmp

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memory/3136-14-0x0000000075050000-0x000000007580C000-memory.dmp

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memory/3856-0-0x0000000075062000-0x0000000075063000-memory.dmp

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memory/3856-1-0x0000000000540000-0x0000000000552000-memory.dmp

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memory/3856-2-0x0000000075050000-0x000000007580C000-memory.dmp

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memory/3856-3-0x0000000004F20000-0x0000000004FBC000-memory.dmp

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memory/3856-9-0x0000000075050000-0x000000007580C000-memory.dmp

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