asyncrat | 1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253

Analysis

max time kernel
148s
max time network
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260630-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260630-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
03/07/2026, 12:46

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General

Target
1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
Size 45KB
Sample260703-pzvd3set9q
SHA256 1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253
MD5 ca78f893c5d22e9814994126cc0c5aa3
SHA1 093a109aa44589f3b9872706f3bf4bfb8ea8cb8c
SHA512 dcfbce3f55a63b3d13a88823038eb7ccccdb081aef3c3c528d1faab9e3ad2ba6ca9941da7f6598b9f8d65f9c371425d134a9432284873a89a6125b4da20a83e9
SSDEEP 768:suJdpTP3tcsWUODmqmo2qVtBz3QKx7PIQzjbQgX3iFamSWLNaIOoFZkBDZkx:suJdpTPdI2IV0Q3bXXSgmjLNaIObdkx
TLSH
T1FD231A003BE8823BF2BE4B78ACF26105857BF6636603D54D6CC451D75623FC69A426EE
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

phimsexvn.work:80
phimsexvn.work:22
phimsexvn.work:8080
phimsexvn.work:8880
phimsexvn.work:2052
phimsexvn.work:2082
phimsexvn.work:2086
phimsexvn.work:2095
phimsexvn.work:443
phimsexvn.work:2053
phimsexvn.work:2083
phimsexvn.work:2087
phimsexvn.work:2096
phimsexvn.work:8443
www.phimsexvn.work:80
www.phimsexvn.work:22
www.phimsexvn.work:8080
www.phimsexvn.work:8880
www.phimsexvn.work:2052
www.phimsexvn.work:2082
www.phimsexvn.work:2086
www.phimsexvn.work:2095
www.phimsexvn.work:443
www.phimsexvn.work:2053
www.phimsexvn.work:2083
www.phimsexvn.work:2087
www.phimsexvn.work:2096
www.phimsexvn.work:8443
fakeupdates.phimsexvn.work:80
fakeupdates.phimsexvn.work:22
fakeupdates.phimsexvn.work:8080
fakeupdates.phimsexvn.work:8880
fakeupdates.phimsexvn.work:2052
fakeupdates.phimsexvn.work:2082
fakeupdates.phimsexvn.work:2086
fakeupdates.phimsexvn.work:2095
fakeupdates.phimsexvn.work:443
fakeupdates.phimsexvn.work:2053
fakeupdates.phimsexvn.work:2083
fakeupdates.phimsexvn.work:2087
fakeupdates.phimsexvn.work:2096
fakeupdates.phimsexvn.work:8443
malware.phimsexvn.work:80
malware.phimsexvn.work:22
malware.phimsexvn.work:8080
malware.phimsexvn.work:8880
malware.phimsexvn.work:2052
malware.phimsexvn.work:2082
malware.phimsexvn.work:2086
malware.phimsexvn.work:2095
malware.phimsexvn.work:443
malware.phimsexvn.work:2053
malware.phimsexvn.work:2083
malware.phimsexvn.work:2087
malware.phimsexvn.work:2096
malware.phimsexvn.work:8443

Mutex

cgCMEK7vWhHm

Attributes

delay
0
install
true
install_file
e04n5x0b.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/0x000d00000001c656-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2868	e04n5x0b.exe
4972	e04n5x0b.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	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e04n5x0b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e04n5x0b.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
6000	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
5868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
Token: SeDebugPrivilege	2868	e04n5x0b.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5692 wrote to memory of 5828	5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe	89
PID 5692 wrote to memory of 5852	5692	1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe	91
PID 5852 wrote to memory of 6000	5852	cmd.exe	93
PID 5828 wrote to memory of 5868	5828	cmd.exe	94
PID 5852 wrote to memory of 4972	5852	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe
"C:\Users\Admin\AppData\Local\Temp\1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5692
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "e04n5x0b" /tr '"C:\Users\Admin\AppData\Roaming\e04n5x0b.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5828
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "e04n5x0b" /tr '"C:\Users\Admin\AppData\Roaming\e04n5x0b.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5868
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7589.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5852
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:6000
- - C:\Users\Admin\AppData\Roaming\e04n5x0b.exe
    "C:\Users\Admin\AppData\Roaming\e04n5x0b.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4972

C:\Users\Admin\AppData\Roaming\e04n5x0b.exe
"C:\Users\Admin\AppData\Roaming\e04n5x0b.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2868

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

tmp7589.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7589.tmp.bat
Size 152B
SHA256 794b6363296366dadb1e4087bbe43e71090877dd06547dfb732302546250f657
MD5 27c6a247e880143260ea3539d84d0e73
SHA1 8157bb94b6c2fbb58123d648e3bb55402d1841c0
SHA512 f9e20425f48605cdd0b0c107d44e34bba42c8e3bbeb5becc170b8a520f58dff7cb7f3c03012d3cbf16bd51d4b012457315020ea46bcb3e5aa89226cce4f72ffa
TLSH
T181C02B4252C6EA0F3809543317FAD48ED172BD193F45BB20C304480E32C0848FCED342
MD5 SHA1 SHA512 TLSH

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e04n5x0b.exe

Path C:\Users\Admin\AppData\Roaming\e04n5x0b.exe
Size 45KB
SHA256 1b3658300a43166ad105705b456adba64078664eded1c71011df7f7ce08a0253
MD5 ca78f893c5d22e9814994126cc0c5aa3
SHA1 093a109aa44589f3b9872706f3bf4bfb8ea8cb8c
SHA512 dcfbce3f55a63b3d13a88823038eb7ccccdb081aef3c3c528d1faab9e3ad2ba6ca9941da7f6598b9f8d65f9c371425d134a9432284873a89a6125b4da20a83e9
SSDEEP 768:suJdpTP3tcsWUODmqmo2qVtBz3QKx7PIQzjbQgX3iFamSWLNaIOoFZkBDZkx:suJdpTPdI2IV0Q3bXXSgmjLNaIObdkx
TLSH
T1FD231A003BE8823BF2BE4B78ACF26105857BF6636603D54D6CC451D75623FC69A426EE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2868-12-0x0000000074A00000-0x00000000751BC000-memory.dmp

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memory/2868-14-0x0000000074A00000-0x00000000751BC000-memory.dmp

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memory/5692-0-0x0000000074A82000-0x0000000074A83000-memory.dmp

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memory/5692-1-0x0000000000980000-0x0000000000992000-memory.dmp

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memory/5692-2-0x0000000074A70000-0x000000007522C000-memory.dmp

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memory/5692-3-0x00000000054E0000-0x000000000557C000-memory.dmp

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memory/5692-8-0x0000000074A70000-0x000000007522C000-memory.dmp

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