asyncrat | 43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058

Analysis

max time kernel
148s
max time network
146s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/08/2026, 17:51

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General

Target
43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
Size 45KB
Sample260804-wfjlssee88
SHA256 43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058
MD5 b6016be2a8db6a29e1d6441b8c0e90c8
SHA1 95562eba7a8029f0df9581703eaca485627137e0
SHA512 9188dc71a6815f296f639b4bf7971c40d05bf5ce88b3a5fa653db99b4c785353372d5f6610562e6c2b6300f737cd7421a912150d4f0b2fd1664c2bafc0dd6c2a
SSDEEP 768:suJdpTP3tcsWUODmqmo2qVT/qpG3jHuPIszjbHgX8iDLyckTPI+BDZkx:suJdpTPdI2WIM3s3bAX5DLyrpdkx
TLSH
T15A233B003BE8C12BF2BE4F78ACF26145427AF6636603D5891CC451D75623FC2DA426EA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

phimsexvnn.com:80
phimsexvnn.com:22
phimsexvnn.com:8080
phimsexvnn.com:8880
phimsexvnn.com:2052
phimsexvnn.com:2082
phimsexvnn.com:2086
phimsexvnn.com:2095
phimsexvnn.com:443
phimsexvnn.com:2053
phimsexvnn.com:2083
phimsexvnn.com:2087
phimsexvnn.com:2096
phimsexvnn.com:8443
www.phimsexvnn.com:80
www.phimsexvnn.com:22
www.phimsexvnn.com:8080
www.phimsexvnn.com:8880
www.phimsexvnn.com:2052
www.phimsexvnn.com:2082
www.phimsexvnn.com:2086
www.phimsexvnn.com:2095
www.phimsexvnn.com:443
www.phimsexvnn.com:2053
www.phimsexvnn.com:2083
www.phimsexvnn.com:2087
www.phimsexvnn.com:2096
www.phimsexvnn.com:8443
fakeupdates.phimsexvnn.com:80
fakeupdates.phimsexvnn.com:22
fakeupdates.phimsexvnn.com:8080
fakeupdates.phimsexvnn.com:8880
fakeupdates.phimsexvnn.com:2052
fakeupdates.phimsexvnn.com:2082
fakeupdates.phimsexvnn.com:2086
fakeupdates.phimsexvnn.com:2095
fakeupdates.phimsexvnn.com:443
fakeupdates.phimsexvnn.com:2053
fakeupdates.phimsexvnn.com:2083
fakeupdates.phimsexvnn.com:2087
fakeupdates.phimsexvnn.com:2096
fakeupdates.phimsexvnn.com:8443
nanocore.phimsexvnn.com:80
nanocore.phimsexvnn.com:22
nanocore.phimsexvnn.com:8080
nanocore.phimsexvnn.com:8880
nanocore.phimsexvnn.com:2052
nanocore.phimsexvnn.com:2082
nanocore.phimsexvnn.com:2086
nanocore.phimsexvnn.com:2095
nanocore.phimsexvnn.com:443
nanocore.phimsexvnn.com:2053
nanocore.phimsexvnn.com:2083
nanocore.phimsexvnn.com:2087
nanocore.phimsexvnn.com:2096
nanocore.phimsexvnn.com:8443

Mutex

ElskbxzsMBFT

Attributes

delay
0
install
true
install_file
ld7kgjqq.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/0x000500000001b809-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3764	ld7kgjqq.exe
3220	ld7kgjqq.exe

Outbound SSH connection to public host 2 TTPs 2 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc
SSH destination	17	104.21.5.48:22
SSH destination	18	172.67.132.249:22

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
1364	cmd.exe
4132	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	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.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	ld7kgjqq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ld7kgjqq.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4720	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
280	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
Token: SeDebugPrivilege	3764	ld7kgjqq.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4076 wrote to memory of 1364	4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe	89
PID 4076 wrote to memory of 4132	4076	43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe	91
PID 1364 wrote to memory of 280	1364	cmd.exe	93
PID 4132 wrote to memory of 4720	4132	cmd.exe	94
PID 4132 wrote to memory of 3220	4132	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe
"C:\Users\Admin\AppData\Local\Temp\43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4076
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ld7kgjqq" /tr '"C:\Users\Admin\AppData\Roaming\ld7kgjqq.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1364
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ld7kgjqq" /tr '"C:\Users\Admin\AppData\Roaming\ld7kgjqq.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:280
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBCAF.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4132
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4720
- - C:\Users\Admin\AppData\Roaming\ld7kgjqq.exe
    "C:\Users\Admin\AppData\Roaming\ld7kgjqq.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3220

C:\Users\Admin\AppData\Roaming\ld7kgjqq.exe
"C:\Users\Admin\AppData\Roaming\ld7kgjqq.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3764

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

Network Service Discovery

T1046

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

T1572

Exfiltration

Impact

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Downloads

tmpBCAF.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpBCAF.tmp.bat
Size 152B
SHA256 f4ad4b76bf9f52023defeff7129fb12c5ff30e39e57fabe86e2e6980e7643efd
MD5 e06183875cb59f601218ff4389055e4c
SHA1 a74680f523a02e7b11982242545b3084d55a347a
SHA512 d55aa05b7048043d82369e7896fb3b405151a5971eee93d38ae191d9af216603cac840f7cc179e15d82a26857760a075f99cd9338d126d15e60dfb6c2c5d2e84
TLSH
T152C08C8262C5AA0E2909181306FAD88EA1B268193E40AB008354842D16885A8F0D9242
MD5 SHA1 SHA512 TLSH

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ld7kgjqq.exe

Path C:\Users\Admin\AppData\Roaming\ld7kgjqq.exe
Size 45KB
SHA256 43b4d816fb246081ef03bb9659a0551dd113310383c25bdbcbdf12eb314a1058
MD5 b6016be2a8db6a29e1d6441b8c0e90c8
SHA1 95562eba7a8029f0df9581703eaca485627137e0
SHA512 9188dc71a6815f296f639b4bf7971c40d05bf5ce88b3a5fa653db99b4c785353372d5f6610562e6c2b6300f737cd7421a912150d4f0b2fd1664c2bafc0dd6c2a
SSDEEP 768:suJdpTP3tcsWUODmqmo2qVT/qpG3jHuPIszjbHgX8iDLyckTPI+BDZkx:suJdpTPdI2WIM3s3bAX5DLyrpdkx
TLSH
T15A233B003BE8C12BF2BE4F78ACF26145427AF6636603D5891CC451D75623FC2DA426EA
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3764-12-0x0000000074D20000-0x00000000754DC000-memory.dmp

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memory/3764-14-0x0000000074D20000-0x00000000754DC000-memory.dmp

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memory/4076-0-0x0000000074EA2000-0x0000000074EA3000-memory.dmp

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memory/4076-1-0x0000000000DD0000-0x0000000000DE2000-memory.dmp

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memory/4076-2-0x0000000074E90000-0x000000007564C000-memory.dmp

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memory/4076-3-0x0000000005810000-0x00000000058AC000-memory.dmp

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memory/4076-8-0x0000000074E90000-0x000000007564C000-memory.dmp

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