asyncrat | 59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f

Analysis

max time kernel
148s
max time network
153s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
07/09/2026, 06:18

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General

Target
59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
Size 45KB
Sample260907-g211msfb86
SHA256 59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f
MD5 dde47c3f1fbcbaf2a3c49c8a62a18688
SHA1 aecb9d70ca706a3795b3a2024c225de855098653
SHA512 d8b0241932bb87aa1e7538e188afe363fd4db0406aa18dcbed7a349fea12e023243ec91cb3a6b533cb82d9df3a91e058e1ad8ecf8ae00c1c8c6389247b7b5b40
SSDEEP 768:5udApTNctooWUS7C+mo2qtbx1HJhOPIcozjbugt3imv01cPU2BDZ0x:5udApTNmU2cFj3co3bRtSLbYd0x
TLSH
T1FA232C003BD8822BF2BE4F7898F26145867AF6637603D54A1CC451DB5613FC6CA526FE
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

phimjapan.com:80
phimjapan.com:22
phimjapan.com:8080
phimjapan.com:8880
phimjapan.com:2052
phimjapan.com:2082
phimjapan.com:2086
phimjapan.com:2095
phimjapan.com:443
phimjapan.com:2053
phimjapan.com:2083
phimjapan.com:2087
phimjapan.com:2096
phimjapan.com:8443
www.phimjapan.com:80
www.phimjapan.com:22
www.phimjapan.com:8080
www.phimjapan.com:8880
www.phimjapan.com:2052
www.phimjapan.com:2082
www.phimjapan.com:2086
www.phimjapan.com:2095
www.phimjapan.com:443
www.phimjapan.com:2053
www.phimjapan.com:2083
www.phimjapan.com:2087
www.phimjapan.com:2096
www.phimjapan.com:8443
iloveyou.phimjapan.com:80
iloveyou.phimjapan.com:22
iloveyou.phimjapan.com:8080
iloveyou.phimjapan.com:8880
iloveyou.phimjapan.com:2052
iloveyou.phimjapan.com:2082
iloveyou.phimjapan.com:2086
iloveyou.phimjapan.com:2095
iloveyou.phimjapan.com:443
iloveyou.phimjapan.com:2053
iloveyou.phimjapan.com:2083
iloveyou.phimjapan.com:2087
iloveyou.phimjapan.com:2096
iloveyou.phimjapan.com:8443
sobig.phimjapan.com:80
sobig.phimjapan.com:22
sobig.phimjapan.com:8080
sobig.phimjapan.com:8880
sobig.phimjapan.com:2052
sobig.phimjapan.com:2082
sobig.phimjapan.com:2086
sobig.phimjapan.com:2095
sobig.phimjapan.com:443
sobig.phimjapan.com:2053
sobig.phimjapan.com:2083
sobig.phimjapan.com:2087
sobig.phimjapan.com:2096
sobig.phimjapan.com:8443

Mutex

HBUcmBvDJQHH

Attributes

delay
0
install
true
install_file
858e8n.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/0x000d00000001c581-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2760	858e8n.exe
1064	858e8n.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	5	104.21.25.162:22
SSH destination	6	172.67.134.96:22

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
3348	cmd.exe
1400	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	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	858e8n.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	858e8n.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4784	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
5524	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
Token: SeDebugPrivilege	2760	858e8n.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4172 wrote to memory of 1400	4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe	89
PID 4172 wrote to memory of 3348	4172	59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe	90
PID 1400 wrote to memory of 5524	1400	cmd.exe	93
PID 3348 wrote to memory of 4784	3348	cmd.exe	94
PID 3348 wrote to memory of 1064	3348	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe
"C:\Users\Admin\AppData\Local\Temp\59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4172
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "858e8n" /tr '"C:\Users\Admin\AppData\Roaming\858e8n.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1400
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "858e8n" /tr '"C:\Users\Admin\AppData\Roaming\858e8n.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5524
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5644.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3348
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4784
- - C:\Users\Admin\AppData\Roaming\858e8n.exe
    "C:\Users\Admin\AppData\Roaming\858e8n.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1064

C:\Users\Admin\AppData\Roaming\858e8n.exe
"C:\Users\Admin\AppData\Roaming\858e8n.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2760

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

tmp5644.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5644.tmp.bat
Size 150B
SHA256 25379f85d7e1c3c210debdbfdda7a2b3f473c7e07e28260113640d8dd6bf5e09
MD5 1dfc0ff0dec0b6d5f6697ca77e9e7662
SHA1 4b1e3a2a37cf579a9fac74bf4dc0d2b7f833bb73
SHA512 3db9f70297c41beded1b9420c85f3ec3eb51c9a5a95a6449970b643bdb2c14e3f488d9c3ad78e4612dde4cb50c673d2f490e2ce3b70dd343c78096ee2c1183ee
TLSH
T189C02B5261C5EA5E2805543302FBDAEC91767D1F3F40BF00D305441F52C0448F0D9381
MD5 SHA1 SHA512 TLSH

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858e8n.exe

Path C:\Users\Admin\AppData\Roaming\858e8n.exe
Size 45KB
SHA256 59e534937e717560cee9e13a9d1e8f8302ce47c540c65f03693126031491509f
MD5 dde47c3f1fbcbaf2a3c49c8a62a18688
SHA1 aecb9d70ca706a3795b3a2024c225de855098653
SHA512 d8b0241932bb87aa1e7538e188afe363fd4db0406aa18dcbed7a349fea12e023243ec91cb3a6b533cb82d9df3a91e058e1ad8ecf8ae00c1c8c6389247b7b5b40
SSDEEP 768:5udApTNctooWUS7C+mo2qtbx1HJhOPIcozjbugt3imv01cPU2BDZ0x:5udApTNmU2cFj3co3bRtSLbYd0x
TLSH
T1FA232C003BD8822BF2BE4F7898F26145867AF6637603D54A1CC451DB5613FC6CA526FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2760-12-0x0000000074C70000-0x000000007542C000-memory.dmp

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memory/2760-14-0x0000000074C70000-0x000000007542C000-memory.dmp

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memory/4172-0-0x0000000074E82000-0x0000000074E83000-memory.dmp

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memory/4172-1-0x0000000000BA0000-0x0000000000BB2000-memory.dmp

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memory/4172-2-0x0000000074E70000-0x000000007562C000-memory.dmp

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memory/4172-3-0x0000000005760000-0x00000000057FC000-memory.dmp

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memory/4172-8-0x0000000074E70000-0x000000007562C000-memory.dmp

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