asyncrat | ce6cde5df3740f3edf9d192f964bddc0a36007236aa6a3d99f693ace7b9acc01

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
31/07/2026, 09:33

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General

Target
tyqwenbdmnf.exe
Size 45KB
Sample260731-ljpbcagb22
SHA256 ce6cde5df3740f3edf9d192f964bddc0a36007236aa6a3d99f693ace7b9acc01
MD5 3fdea84fbcbaceb5d1a9c4d6ff0d9113
SHA1 69fbefd3a028774d2017428e31ebe587eab3eed4
SHA512 383e533714be2db77e3440b68844ad42686094675238389d7aacfcb5a2a024509084097536f625d8729745f23fc6cc76038255244415b9f5f708de63c0300290
SSDEEP 768:puSPNTdxr7xWUpWm7mo2qL9n3nouPIVzjbygX3itegeNPw3BDZ7x:puSPNTdtx2y3oXV3b1XS4geNPYd7x
TLSH
T134232A003BE9812BF2BE4F78ADF26105467AF1A33603D6491CC4419B5723FC69A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

admin defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Admin

lotensaar.nl/vi-vn/:80
lotensaar.nl/vi-vn/:443
lotensaar.nl/vi-vn/:7788
lotensaar.nl/vi-vn/:7879
lotensaar.nl/vi-vn/:3577
lotensaar.nl/:80
lotensaar.nl/:443
lotensaar.nl/:7788
lotensaar.nl/:7879
lotensaar.nl/:3577
www.lotensaar.nl/:80
www.lotensaar.nl/:443
www.lotensaar.nl/:7788
www.lotensaar.nl/:7879
www.lotensaar.nl/:3577

Mutex

nYYX0hfUNfBo

Attributes

delay
3
install
true
install_file
tyqwenbdmnf.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/0x0003000000008f2c-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2928	tyqwenbdmnf.exe
6024	tyqwenbdmnf.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
1688	cmd.exe
3040	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	tyqwenbdmnf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tyqwenbdmnf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tyqwenbdmnf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
400	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
260	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe
4684	tyqwenbdmnf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4684	tyqwenbdmnf.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4684 wrote to memory of 1688	4684	tyqwenbdmnf.exe	89
PID 4684 wrote to memory of 3040	4684	tyqwenbdmnf.exe	91
PID 1688 wrote to memory of 260	1688	cmd.exe	93
PID 3040 wrote to memory of 400	3040	cmd.exe	94
PID 3040 wrote to memory of 6024	3040	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\tyqwenbdmnf.exe
"C:\Users\Admin\AppData\Local\Temp\tyqwenbdmnf.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4684
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "tyqwenbdmnf" /tr '"C:\Users\Admin\AppData\Roaming\tyqwenbdmnf.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1688
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "tyqwenbdmnf" /tr '"C:\Users\Admin\AppData\Roaming\tyqwenbdmnf.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:260
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8DFE.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3040
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:400
- - C:\Users\Admin\AppData\Roaming\tyqwenbdmnf.exe
    "C:\Users\Admin\AppData\Roaming\tyqwenbdmnf.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:6024

C:\Users\Admin\AppData\Roaming\tyqwenbdmnf.exe
"C:\Users\Admin\AppData\Roaming\tyqwenbdmnf.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2928

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

tmp8DFE.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8DFE.tmp.bat
Size 155B
SHA256 7ec87c296fa10007d89515cb06a7dbf5b307961f31c6d98bf45fd4cfaeb1731c
MD5 d9261e4c6a2c7c50aea633d35164cdd7
SHA1 8ace89f67cadeab3bddbd7b4bf36adfb03e79445
SHA512 2eb370cd6bcefdca35b7336b69e84230d98a0c75798b7f0d4009a8756f0298a4d220dde5389cbcce94d44bc7704be4488b14dcd0bec45d478ca0f6b2c6cfeee8
TLSH
T117C08C8255CAEA0F2905583317BAD99CA16668193E85BB40C70449496680488E0AA381
MD5 SHA1 SHA512 TLSH

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tyqwenbdmnf.exe

Path C:\Users\Admin\AppData\Roaming\tyqwenbdmnf.exe
Size 45KB
SHA256 ce6cde5df3740f3edf9d192f964bddc0a36007236aa6a3d99f693ace7b9acc01
MD5 3fdea84fbcbaceb5d1a9c4d6ff0d9113
SHA1 69fbefd3a028774d2017428e31ebe587eab3eed4
SHA512 383e533714be2db77e3440b68844ad42686094675238389d7aacfcb5a2a024509084097536f625d8729745f23fc6cc76038255244415b9f5f708de63c0300290
SSDEEP 768:puSPNTdxr7xWUpWm7mo2qL9n3nouPIVzjbygX3itegeNPw3BDZ7x:puSPNTdtx2y3oXV3b1XS4geNPYd7x
TLSH
T134232A003BE9812BF2BE4F78ADF26105467AF1A33603D6491CC4419B5723FC69A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2928-12-0x00000000742D0000-0x0000000074A8C000-memory.dmp

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memory/2928-14-0x00000000742D0000-0x0000000074A8C000-memory.dmp

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memory/4684-0-0x00000000742F2000-0x00000000742F3000-memory.dmp

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memory/4684-1-0x0000000000B60000-0x0000000000B72000-memory.dmp

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memory/4684-2-0x00000000742E0000-0x0000000074A9C000-memory.dmp

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memory/4684-3-0x00000000057D0000-0x000000000586C000-memory.dmp

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memory/4684-8-0x00000000742E0000-0x0000000074A9C000-memory.dmp

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