asyncrat | 3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a

Analysis

max time kernel
150s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
21/07/2026, 15:05

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General

Target
3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
Size 45KB
Sample260721-sgcyvsbd64
SHA256 3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a
MD5 4efbcaa7b38e9b770f7e2ad3ee9b6e50
SHA1 36bedeeb75fdc953fb1000cc6df9b5c6858fc918
SHA512 934118d72720f1f1a37402f627cf8c40bb8f6cc9fbde6e0cdba4ddbae5a3e1c5e882ec561a1007b57f93927844c526155d61a298fe6db665aa8e9338552ea283
SSDEEP 768:Iu6RaepTPYzbs8WU+Xaamo2q1m0UwPOlehAPITpzjbAgX3inxGiTVsBDZox:Iu6YepTPso2/0/OghlTp3bnXSZhqdox
TLSH
T168233B103BE9813BF2BE4F7899F22145867AF2637603D64D2CC451DB4A13FC69A426ED
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

phimsexvietnamhd.net:80
phimsexvietnamhd.net:22
phimsexvietnamhd.net:8080
phimsexvietnamhd.net:8880
phimsexvietnamhd.net:2052
phimsexvietnamhd.net:2082
phimsexvietnamhd.net:2086
phimsexvietnamhd.net:2095
phimsexvietnamhd.net:443
phimsexvietnamhd.net:2053
phimsexvietnamhd.net:2083
phimsexvietnamhd.net:2087
phimsexvietnamhd.net:2096
phimsexvietnamhd.net:8443
www.phimsexvietnamhd.net:80
www.phimsexvietnamhd.net:22
www.phimsexvietnamhd.net:8080
www.phimsexvietnamhd.net:8880
www.phimsexvietnamhd.net:2052
www.phimsexvietnamhd.net:2082
www.phimsexvietnamhd.net:2086
www.phimsexvietnamhd.net:2095
www.phimsexvietnamhd.net:443
www.phimsexvietnamhd.net:2053
www.phimsexvietnamhd.net:2083
www.phimsexvietnamhd.net:2087
www.phimsexvietnamhd.net:2096
www.phimsexvietnamhd.net:8443
nanocore.phimsexvietnamhd.net:80
nanocore.phimsexvietnamhd.net:22
nanocore.phimsexvietnamhd.net:8080
nanocore.phimsexvietnamhd.net:8880
nanocore.phimsexvietnamhd.net:2052
nanocore.phimsexvietnamhd.net:2082
nanocore.phimsexvietnamhd.net:2086
nanocore.phimsexvietnamhd.net:2095
nanocore.phimsexvietnamhd.net:443
nanocore.phimsexvietnamhd.net:2053
nanocore.phimsexvietnamhd.net:2083
nanocore.phimsexvietnamhd.net:2087
nanocore.phimsexvietnamhd.net:2096
nanocore.phimsexvietnamhd.net:8443
invasive.phimsexvietnamhd.net:80
invasive.phimsexvietnamhd.net:22
invasive.phimsexvietnamhd.net:8080
invasive.phimsexvietnamhd.net:8880
invasive.phimsexvietnamhd.net:2052
invasive.phimsexvietnamhd.net:2082
invasive.phimsexvietnamhd.net:2086
invasive.phimsexvietnamhd.net:2095
invasive.phimsexvietnamhd.net:443
invasive.phimsexvietnamhd.net:2053
invasive.phimsexvietnamhd.net:2083
invasive.phimsexvietnamhd.net:2087
invasive.phimsexvietnamhd.net:2096
invasive.phimsexvietnamhd.net:8443

Mutex

pFRlFuWoobWj

Attributes

delay
0
install
true
install_file
644qtfyv.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/0x000d00000001c5b0-11.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2864	644qtfyv.exe
5292	644qtfyv.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
5852	cmd.exe
1620	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	644qtfyv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	644qtfyv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4460	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
5564	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
Token: SeDebugPrivilege	2864	644qtfyv.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4148 wrote to memory of 5852	4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe	88
PID 4148 wrote to memory of 1620	4148	3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe	90
PID 5852 wrote to memory of 5564	5852	cmd.exe	92
PID 1620 wrote to memory of 4460	1620	cmd.exe	93
PID 1620 wrote to memory of 5292	1620	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe
"C:\Users\Admin\AppData\Local\Temp\3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4148
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "644qtfyv" /tr '"C:\Users\Admin\AppData\Roaming\644qtfyv.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5852
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "644qtfyv" /tr '"C:\Users\Admin\AppData\Roaming\644qtfyv.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5564
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC848.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1620
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4460
- - C:\Users\Admin\AppData\Roaming\644qtfyv.exe
    "C:\Users\Admin\AppData\Roaming\644qtfyv.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5292

C:\Users\Admin\AppData\Roaming\644qtfyv.exe
"C:\Users\Admin\AppData\Roaming\644qtfyv.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2864

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:3228

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

tmpC848.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpC848.tmp.bat
Size 152B
SHA256 4d32c7a203d275372944996ce71e74bf14a6c1c8904f3dbd22ef0d8e2a0227eb
MD5 4f1b161ea0749b9f412a598b7b36a3c2
SHA1 4138a2b7ecf482b910c026aa05ca23a0192e5f14
SHA512 762f763f7669e15d31dd42e9b9a78df02d53a31dd47d5971cbf8a8b4e7dc5eb28a90f3c7bef5b939d56e2f8d3079696c6c33a6bd79dcdf14117fb280c634292f
TLSH
T115C02B436AC5FE4E28092C6312FBD5DCA27BBC2E7F44BB20D70C480D5A80459F0D9381
MD5 SHA1 SHA512 TLSH

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644qtfyv.exe

Path C:\Users\Admin\AppData\Roaming\644qtfyv.exe
Size 45KB
SHA256 3c83e1452cd1a2ab37f419249209e85acad101ac115a47d99c2db79ee851b92a
MD5 4efbcaa7b38e9b770f7e2ad3ee9b6e50
SHA1 36bedeeb75fdc953fb1000cc6df9b5c6858fc918
SHA512 934118d72720f1f1a37402f627cf8c40bb8f6cc9fbde6e0cdba4ddbae5a3e1c5e882ec561a1007b57f93927844c526155d61a298fe6db665aa8e9338552ea283
SSDEEP 768:Iu6RaepTPYzbs8WU+Xaamo2q1m0UwPOlehAPITpzjbAgX3inxGiTVsBDZox:Iu6YepTPso2/0/OghlTp3bnXSZhqdox
TLSH
T168233B103BE9813BF2BE4F7899F22145867AF2637603D64D2CC451DB4A13FC69A426ED
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2864-12-0x0000000074A60000-0x000000007521C000-memory.dmp

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memory/2864-14-0x0000000074A60000-0x000000007521C000-memory.dmp

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memory/4148-0-0x0000000074C42000-0x0000000074C43000-memory.dmp

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memory/4148-1-0x00000000001B0000-0x00000000001C2000-memory.dmp

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memory/4148-2-0x0000000074C30000-0x00000000753EC000-memory.dmp

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memory/4148-3-0x0000000004D60000-0x0000000004DFC000-memory.dmp

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memory/4148-8-0x0000000074C30000-0x00000000753EC000-memory.dmp

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