asyncrat | 8c827b9895c430e538b6f98792881c1191c49a750b769cd2956c6cb8f2a04198

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-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
behavioral1/files/0x000500000001d9f6-10.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-643422742-1162610606-620613169-1000\Control Panel\International\Geo\Nation	nke33.exe

Executes dropped EXE 2 IoCs

pid	Process
736	nke33.exe
2632	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2036	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
3248	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe
4584	nke33.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4584	nke33.exe
Token: SeDebugPrivilege	736	nke33.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4584 wrote to memory of 4432	4584	nke33.exe	85
PID 4584 wrote to memory of 6032	4584	nke33.exe	87
PID 4432 wrote to memory of 3248	4432	cmd.exe	89
PID 6032 wrote to memory of 2036	6032	cmd.exe	90
PID 6032 wrote to memory of 2632	6032	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\nke33.exe
"C:\Users\Admin\AppData\Local\Temp\nke33.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4584
- 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:4432
- - 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:3248
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2E10.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6032
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2036
- - 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:2632

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:736

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

Query Registry

T1012

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 2412679218bb0a7d05ceee32869bbb223619bde9966c4c460a68304a3367724b
MD5 acc9090417037dfa2a55b46ed86e32b8
SHA1 53fa6fb25fb3e88c24d2027aca6ae492b2800a4d
SHA512 d51f7085ec147c708f446b9fb6923cd2fb64596d354ed929e125b30ace57c8cb3217589447a36960e5d3aea87a4e48aaa82c7509eced6d6c2cecd71fcfe3697b
TLSH
T11EF097303722E1E489423F521C1C3A9943EF079AA360EE2C3958036ED825227AB212E3
MD5 SHA1 SHA512 TLSH

Submit Download

tmp2E10.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp2E10.tmp.bat
Size 149B
SHA256 0d019c2d7e2064a212f673b80360a0f9a94ac02e5dc9f57b4c2aaf65832fbc4d
MD5 c5b2c123556d1f448412f8bc3e0fd103
SHA1 bcc765265cc443f9dbba88b4175103b02c57e6ba
SHA512 9c16a719b60ccbfde296504cbc7f95fa769942cd00f1cc5d7a1c3b664fbcee261285ef238fa7d6a3313ef13b3c80088f9bbfee0ba3c02fe1f57527c8a46f2248
TLSH
T1E7C02B5365D9EA1F3A0D541302FBD4EC917A7DFD3F48BB00C344400D1280448F4D9341
MD5 SHA1 SHA512 TLSH

Submit Download

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

Submit Download

memory/736-17-0x0000000004F80000-0x0000000005201000-memory.dmp

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memory/736-19-0x0000000002A50000-0x0000000002A5A000-memory.dmp

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memory/736-18-0x00000000029E0000-0x0000000002A3F000-memory.dmp

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memory/2632-16-0x0000000002DA0000-0x0000000002DAA000-memory.dmp

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memory/2632-15-0x0000000002CF0000-0x0000000002D4F000-memory.dmp

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memory/2632-14-0x0000000005210000-0x0000000005491000-memory.dmp

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memory/4584-8-0x0000000005AA0000-0x0000000005AFF000-memory.dmp

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memory/4584-0-0x0000000000EF0000-0x0000000000F02000-memory.dmp

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memory/4584-7-0x0000000005810000-0x0000000005A91000-memory.dmp

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memory/4584-2-0x0000000005BB0000-0x0000000005C4C000-memory.dmp

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memory/4584-1-0x0000000005BA0000-0x0000000005BB0000-memory.dmp

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