asyncrat | 7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0

Analysis

max time kernel
148s
max time network
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/08/2026, 16:07

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General

Target
7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
Size 45KB
Sample260804-tkqvkathnh
SHA256 7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0
MD5 c9abfda4b01d22b386b0538978afa788
SHA1 2177385623026a70af113bc7e1e85a861ab59103
SHA512 d403ce9c3561a57d830d5c17223f9abce063efbbb848a888b968e73e53cb80cad18d02c4601ed1c3948ffa049d2371f5b0fac7e914d4f5109a0612a21a1ba268
SSDEEP 768:5udApTNctooWUS7C+mo2qtbx1HJhOPIcozjbsgT3ivc+HsyHZxMPpuKBDZ0x:5udApTNmU2cFj3co3bjTSvtMPxd0x
TLSH
T1D1231B003BE8C22BF2BE4F74A8F26145467AF6673603D58E1CC451DB5613FC68A426EE
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

viet69i.com:80
viet69i.com:22
viet69i.com:8080
viet69i.com:8880
viet69i.com:2052
viet69i.com:2082
viet69i.com:2086
viet69i.com:2095
viet69i.com:443
viet69i.com:2053
viet69i.com:2083
viet69i.com:2087
viet69i.com:2096
viet69i.com:8443
www.viet69i.com:80
www.viet69i.com:22
www.viet69i.com:8080
www.viet69i.com:8880
www.viet69i.com:2052
www.viet69i.com:2082
www.viet69i.com:2086
www.viet69i.com:2095
www.viet69i.com:443
www.viet69i.com:2053
www.viet69i.com:2083
www.viet69i.com:2087
www.viet69i.com:2096
www.viet69i.com:8443
locky.viet69i.com:80
locky.viet69i.com:22
locky.viet69i.com:8080
locky.viet69i.com:8880
locky.viet69i.com:2052
locky.viet69i.com:2082
locky.viet69i.com:2086
locky.viet69i.com:2095
locky.viet69i.com:443
locky.viet69i.com:2053
locky.viet69i.com:2083
locky.viet69i.com:2087
locky.viet69i.com:2096
locky.viet69i.com:8443
malware.viet69i.com:80
malware.viet69i.com:22
malware.viet69i.com:8080
malware.viet69i.com:8880
malware.viet69i.com:2052
malware.viet69i.com:2082
malware.viet69i.com:2086
malware.viet69i.com:2095
malware.viet69i.com:443
malware.viet69i.com:2053
malware.viet69i.com:2083
malware.viet69i.com:2087
malware.viet69i.com:2096
malware.viet69i.com:8443

Mutex

bBNHhU0oRrQY

Attributes

delay
0
install
true
install_file
k5uk2n.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/0x000e00000001c563-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
6016	k5uk2n.exe
4428	k5uk2n.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
2272	cmd.exe
2592	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	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.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	k5uk2n.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	k5uk2n.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
6020	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
3912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
Token: SeDebugPrivilege	6016	k5uk2n.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5180 wrote to memory of 2272	5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe	88
PID 5180 wrote to memory of 2592	5180	7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe	90
PID 2592 wrote to memory of 6020	2592	cmd.exe	92
PID 2272 wrote to memory of 3912	2272	cmd.exe	93
PID 2592 wrote to memory of 4428	2592	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe
"C:\Users\Admin\AppData\Local\Temp\7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5180
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "k5uk2n" /tr '"C:\Users\Admin\AppData\Roaming\k5uk2n.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2272
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "k5uk2n" /tr '"C:\Users\Admin\AppData\Roaming\k5uk2n.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3912
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB4B0.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2592
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:6020
- - C:\Users\Admin\AppData\Roaming\k5uk2n.exe
    "C:\Users\Admin\AppData\Roaming\k5uk2n.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4428

C:\Users\Admin\AppData\Roaming\k5uk2n.exe
"C:\Users\Admin\AppData\Roaming\k5uk2n.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:6016

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

tmpB4B0.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpB4B0.tmp.bat
Size 150B
SHA256 154127000f3ce0c23ec8a475af91c65e5a3e11b894e898462f05775913b8f879
MD5 1be5d5ab9846974820c0341bdf2d7ec9
SHA1 3fdc9e5d7795ee466ddbbe5fa9fdce29760a30fe
SHA512 f462ff7d74b63aa9c62b4ea1e176f1844310ef219a9fdbc3080ae1eb9b6c92e56db5dd4e3e7bc3ce00ac58a1f0fb16ee44d2b0055cf92cd77d450acba9b6cec4
TLSH
T122C02B4361C6EA4F2805145312FAD4CCA1B67C1D3F40BB40C718441E26C448CF0DD346
MD5 SHA1 SHA512 TLSH

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k5uk2n.exe

Path C:\Users\Admin\AppData\Roaming\k5uk2n.exe
Size 45KB
SHA256 7fe633960ddd3fad1fb588e8819e1674d0acfbf1f9c287414a946bb30f2c79e0
MD5 c9abfda4b01d22b386b0538978afa788
SHA1 2177385623026a70af113bc7e1e85a861ab59103
SHA512 d403ce9c3561a57d830d5c17223f9abce063efbbb848a888b968e73e53cb80cad18d02c4601ed1c3948ffa049d2371f5b0fac7e914d4f5109a0612a21a1ba268
SSDEEP 768:5udApTNctooWUS7C+mo2qtbx1HJhOPIcozjbsgT3ivc+HsyHZxMPpuKBDZ0x:5udApTNmU2cFj3co3bjTSvtMPxd0x
TLSH
T1D1231B003BE8C22BF2BE4F74A8F26145467AF6673603D58E1CC451DB5613FC68A426EE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/5180-0-0x00000000751F2000-0x00000000751F3000-memory.dmp

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memory/5180-1-0x0000000000EA0000-0x0000000000EB2000-memory.dmp

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memory/5180-2-0x00000000751E0000-0x000000007599C000-memory.dmp

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memory/5180-3-0x0000000005910000-0x00000000059AC000-memory.dmp

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memory/5180-8-0x00000000751E0000-0x000000007599C000-memory.dmp

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memory/6016-12-0x0000000075070000-0x000000007582C000-memory.dmp

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memory/6016-14-0x0000000075070000-0x000000007582C000-memory.dmp

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