asyncrat | 623f45498bb31d266c22761fed6db8c2c5d763b6ec8293a4766bbc025b720fba

Analysis

max time kernel
148s
max time network
154s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260629-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
06/07/2026, 16:21

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General

Target
AsyncRAT.exe
Size 56KB
Sample260706-ttya1adt4j
SHA256 623f45498bb31d266c22761fed6db8c2c5d763b6ec8293a4766bbc025b720fba
MD5 a67ec5cb14b78085d56bfeb0146dae72
SHA1 84758ee7958e31a8614ff4eac9f72c5b6243adb4
SHA512 ad9c1eba656a3ddea572b681a9d06dfd00b8256180ccdfe402f585298584b1b8b49871f61f0fb338a8a320c106b5d745b44c3d5f0ef2fffc9ccd91460268cc6b
SSDEEP 1536:OuskdTsnb22YikbeXSkq+xVwdlkejNUHLTq:OusITsnb22Yikbe9q+DwrkINmq
TLSH
T15C435B0037E98227F1BE4FB8ACB26145467AE2736603E95D2CC451DB5B23BC5DA026FD
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

sijs-etenendrinken.nl:443
sijs-etenendrinken.nl:8848
sijs-etenendrinken.nl:8080

Mutex

XQUGLXmKei9m

Attributes

delay
3
install
true
install_file
AsyncRat.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/0x000e00000001c511-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1256	AsyncRat.exe
2840	AsyncRat.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	AsyncRAT.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRat.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
968	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
5224	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe
5448	AsyncRAT.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5448	AsyncRAT.exe
Token: SeDebugPrivilege	1256	AsyncRat.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5448 wrote to memory of 3468	5448	AsyncRAT.exe	88
PID 5448 wrote to memory of 5292	5448	AsyncRAT.exe	90
PID 5292 wrote to memory of 968	5292	cmd.exe	92
PID 3468 wrote to memory of 5224	3468	cmd.exe	93
PID 5292 wrote to memory of 2840	5292	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\AsyncRAT.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncRAT.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5448
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3468
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5224
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2466.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5292
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:968
- - C:\Users\Admin\AppData\Roaming\AsyncRat.exe
    "C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2840

C:\Users\Admin\AppData\Roaming\AsyncRat.exe
"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1256

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
PID:240
- C:\Windows\explorer.exe
  explorer.exe /LOADSAVEDWINDOWS
  2⤵
  PID:5272

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
1⤵
PID:1508

C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
"C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
1⤵
PID:5744

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

prep_Activatable Class_Hermes_perf.cache

Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
Size 603B
SHA256 b346273b0f3e13afaa9f07d97248343c45a667a5e097d1198a449a4de187aebb
MD5 2510ff22aab74c2ba735738716005a2f
SHA1 306d676ad05de19254b82e221f183ff918e4902b
SHA512 b06c9137817610963efc14c36895253ac8c2eb5af5c9c5e3bdfa59fef8050d9827e4d250b571051c52d7141b4d69702cb0e23a14a114c3e163b1b5bdb2911f1f
TLSH
T1BEF0DC53D3E25125E023023D88A61BD27A33DB596FC7262B4540AE6C3E3B3002F494BC
MD5 SHA1 SHA512 TLSH

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prep_Activatable Class_Hermes_perf.cache

Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
Size 595B
SHA256 d4e60617c2afab8263febabe7f14f18595715078d71307a8cefe0707dae76dee
MD5 4454c8e578515db43fadd90604ae7675
SHA1 3912ffa00c3a5c86fae6500a0074284d9f668976
SHA512 b17559d466cb6954554c4f879b396ff8431c730f837205547ab46329c6517cd35a719378efa55d78c01b739414dd320157f120feb12e28e1ae90ce7c53a0c75c
TLSH
T117F0DC47E7B15216C926123CC89724E1B730F5917DD1162341056F5D2C373101F17CB8
MD5 SHA1 SHA512 TLSH

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tmp2466.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp2466.tmp.bat
Size 152B
SHA256 d10f28bf913b4ff6548a2e320e97e353ae4b8cf0b42224f536b210c6a2d4ca0e
MD5 5181aa4ddbd2eae5bb65fbb245d84bb9
SHA1 e0a0cb228f64c90e3138433e4a8dfeaffb1de60d
SHA512 23d744aff2895d9e351c2fe7f3ca146655ff9ea7e119d24d80f758baace62b5b8f1078ef6c7f5ff8d0d7737fdd6542d7580610a2bbf05ada243ce0b908985fca
TLSH
T147C08C52A2C6AB2E7C06341312BAD88CA1666C993E40AB50C34844A9128058DE0A9241
MD5 SHA1 SHA512 TLSH

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AsyncRat.exe

Path C:\Users\Admin\AppData\Roaming\AsyncRat.exe
Size 56KB
SHA256 623f45498bb31d266c22761fed6db8c2c5d763b6ec8293a4766bbc025b720fba
MD5 a67ec5cb14b78085d56bfeb0146dae72
SHA1 84758ee7958e31a8614ff4eac9f72c5b6243adb4
SHA512 ad9c1eba656a3ddea572b681a9d06dfd00b8256180ccdfe402f585298584b1b8b49871f61f0fb338a8a320c106b5d745b44c3d5f0ef2fffc9ccd91460268cc6b
SSDEEP 1536:OuskdTsnb22YikbeXSkq+xVwdlkejNUHLTq:OusITsnb22Yikbe9q+DwrkINmq
TLSH
T15C435B0037E98227F1BE4FB8ACB26145467AE2736603E95D2CC451DB5B23BC5DA026FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1256-14-0x0000000074C60000-0x000000007541C000-memory.dmp

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memory/1256-12-0x0000000074C60000-0x000000007541C000-memory.dmp

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memory/1508-17-0x0000020C001E0000-0x0000020C002E0000-memory.dmp

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memory/1508-64-0x0000020C14230000-0x0000020C14250000-memory.dmp

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memory/1508-31-0x0000020C03A20000-0x0000020C03A40000-memory.dmp

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memory/1508-29-0x0000020C13E60000-0x0000020C13F60000-memory.dmp

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memory/1508-27-0x0000020C03A20000-0x0000020C03A40000-memory.dmp

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memory/5448-9-0x0000000074C60000-0x000000007541C000-memory.dmp

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memory/5448-3-0x00000000056C0000-0x000000000575C000-memory.dmp

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memory/5448-0-0x0000000074C72000-0x0000000074C73000-memory.dmp

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memory/5448-2-0x0000000074C60000-0x000000007541C000-memory.dmp

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memory/5448-1-0x0000000000BD0000-0x0000000000BE4000-memory.dmp

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