asyncrat | 8c827b9895c430e538b6f98792881c1191c49a750b769cd2956c6cb8f2a04198

Analysis

max time kernel
149s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
07/05/2026, 05:59

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General

Target
nke33.exe
Size 45KB
Sample260507-gpp3lsfx2y
SHA256 8c827b9895c430e538b6f98792881c1191c49a750b769cd2956c6cb8f2a04198
MD5 9dc8d43bc9523f2cd9e563df0c64c6cc
SHA1 8d5568bc9f5aa8f280b31e95936d4b36554d8256
SHA512 f59f25580f4a9bed28342ac7820b8ccd22bfd0bf9712f42e4ee289acab948f1a5cda85589acef1bd42cce82d210f0df92d03f3318da60149ce4fb8764741cd69
SSDEEP 768:RuWM1T1hx/9WU9PloXmo2qzJ3Fo9EaOPIdzjbwgX3ihfUZjHBDZTx:RuWM1T1PvC2i8Ea3d3b3XSlUZVdTx
TLSH
T10E232B003BE9822BF2BE4F78ACF26145867AF1632603D54E1CC451D75713BC69A42AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

rentapolaroid.nl/vi-vn defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

rentapolaroid.nl/vi-vn

rentapolaroid.nl/vi-vn:80
rentapolaroid.nl/vi-vn:443
rentapolaroid.nl/vi-vn:3306
rentapolaroid.nl/vi-vn:8080
rentapolaroid.nl/vi-vn:8443
rentapolaroid.nl/vi-vn:20
rentapolaroid.nl/vi-vn:25
rentapolaroid.nl:80
rentapolaroid.nl:443
rentapolaroid.nl:3306
rentapolaroid.nl:8080
rentapolaroid.nl:8443
rentapolaroid.nl:20
rentapolaroid.nl:25

Mutex

nilJyXAqQ7Bw

Attributes

delay
3
install
true
install_file
nke33.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/0x000500000002a648-9.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2056	nke33.exe
2140	nke33.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	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	nke33.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nke33.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nke33.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
564	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
5080	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe
6088	nke33.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	6088	nke33.exe
Token: SeDebugPrivilege	2056	nke33.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 6088 wrote to memory of 4264	6088	nke33.exe	78
PID 6088 wrote to memory of 3924	6088	nke33.exe	80
PID 4264 wrote to memory of 5080	4264	cmd.exe	82
PID 3924 wrote to memory of 564	3924	cmd.exe	83
PID 3924 wrote to memory of 2140	3924	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\nke33.exe
"C:\Users\Admin\AppData\Local\Temp\nke33.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:6088
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "nke33" /tr '"C:\Users\Admin\AppData\Roaming\nke33.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4264
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "nke33" /tr '"C:\Users\Admin\AppData\Roaming\nke33.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5080
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpED0F.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3924
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:564
- - C:\Users\Admin\AppData\Roaming\nke33.exe
    "C:\Users\Admin\AppData\Roaming\nke33.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2140

C:\Users\Admin\AppData\Roaming\nke33.exe
"C:\Users\Admin\AppData\Roaming\nke33.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2056

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

nke33.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\nke33.exe.log
Size 522B
SHA256 3a8c487575696f7ace931dc220c85a47d33e0ead96aa9e47c705fee5dfac667a
MD5 db9f45365506c49961bfaf3be1475ad2
SHA1 6bd7222f7b7e3e9685207cb285091c92728168e4
SHA512 807028e2aed5b25b2d19ec4f09867746456de4e506c90c73e6730b35303511349a79ca0b9290509664edc0433d47e3fc7f2661534293ebb82185b1494da86a41
TLSH
T10DF09E303231B1D848023F42181C7A8942EF0746B7B8DF2D3650231EDC350176F212E3
MD5 SHA1 SHA512 TLSH

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tmpED0F.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpED0F.tmp.bat
Size 149B
SHA256 3d8911320b176842c547c6379cb6b5bee85f36bb23aa62b098ddd9e711ad3930
MD5 97cd28068ffdaa2bc95919bd8c4ba323
SHA1 22c88868a0aa18153e77254bbd8790ac881401b6
SHA512 1ecc4bfc292f1ceffeab0f48bbd30cf12b8abc2aa4ada20f752443d907214df75e49b18edbe731c5fa15a3a83f1c78804777d4a1364c1d2d13fa675a79701734
TLSH
T1C1C08C5255CAEA0E3809141302BBA49C926669A93F48AB00830440091280448F49A241
MD5 SHA1 SHA512 TLSH

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nke33.exe

Path C:\Users\Admin\AppData\Roaming\nke33.exe
Size 45KB
SHA256 8c827b9895c430e538b6f98792881c1191c49a750b769cd2956c6cb8f2a04198
MD5 9dc8d43bc9523f2cd9e563df0c64c6cc
SHA1 8d5568bc9f5aa8f280b31e95936d4b36554d8256
SHA512 f59f25580f4a9bed28342ac7820b8ccd22bfd0bf9712f42e4ee289acab948f1a5cda85589acef1bd42cce82d210f0df92d03f3318da60149ce4fb8764741cd69
SSDEEP 768:RuWM1T1hx/9WU9PloXmo2qzJ3Fo9EaOPIdzjbwgX3ihfUZjHBDZTx:RuWM1T1PvC2i8Ea3d3b3XSlUZVdTx
TLSH
T10E232B003BE9822BF2BE4F78ACF26145867AF1632603D54E1CC451D75713BC69A42AFE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2056-15-0x00000000031B0000-0x00000000031BB000-memory.dmp

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memory/2056-16-0x0000000005810000-0x000000000590E000-memory.dmp

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memory/2140-13-0x0000000004FA0000-0x0000000004FAB000-memory.dmp

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memory/2140-14-0x0000000004FB0000-0x00000000050AE000-memory.dmp

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memory/6088-0-0x0000000000740000-0x0000000000752000-memory.dmp

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memory/6088-1-0x0000000005260000-0x0000000005270000-memory.dmp

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memory/6088-2-0x0000000005370000-0x000000000540C000-memory.dmp

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memory/6088-7-0x0000000005270000-0x000000000536E000-memory.dmp

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