asyncrat | 6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6

Analysis

max time kernel
148s
max time network
153s
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, 06:32

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General

Target
6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
Size 45KB
Sample260804-hak1saed77
SHA256 6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6
MD5 5b73086f61b492aab5030809a8d6b630
SHA1 7103429b69db0c61b2e25990a46f8e1e97b37235
SHA512 5c52c21940bebc6c019af655f10695eeeff982751455a1f0673b43fe107be1da9395731936869e7c854d942b9c28b7479fca1d4babf4a155f1c5e93a143a4e81
SSDEEP 768:5udApTNctooWUS7C+mo2qthRzMwnOPIZzjbQgX3iSm/9oEoEDqmaX+BDZ0x:5udApTNmU2qA+3Z3bXXSSm/9LjDlaXQU
TLSH
T126233C0037E8812BF2BF5F7899F26246467AF6633603D6891CC4519B5613FC6CA426FD
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

vnsextop1.com:80
vnsextop1.com:22
vnsextop1.com:8080
vnsextop1.com:8880
vnsextop1.com:2052
vnsextop1.com:2082
vnsextop1.com:2086
vnsextop1.com:2095
vnsextop1.com:443
vnsextop1.com:2053
vnsextop1.com:2083
vnsextop1.com:2087
vnsextop1.com:2096
vnsextop1.com:8443
www.vnsextop1.com:80
www.vnsextop1.com:22
www.vnsextop1.com:8080
www.vnsextop1.com:8880
www.vnsextop1.com:2052
www.vnsextop1.com:2082
www.vnsextop1.com:2086
www.vnsextop1.com:2095
www.vnsextop1.com:443
www.vnsextop1.com:2053
www.vnsextop1.com:2083
www.vnsextop1.com:2087
www.vnsextop1.com:2096
www.vnsextop1.com:8443
clop.vnsextop1.com:80
clop.vnsextop1.com:22
clop.vnsextop1.com:8080
clop.vnsextop1.com:8880
clop.vnsextop1.com:2052
clop.vnsextop1.com:2082
clop.vnsextop1.com:2086
clop.vnsextop1.com:2095
clop.vnsextop1.com:443
clop.vnsextop1.com:2053
clop.vnsextop1.com:2083
clop.vnsextop1.com:2087
clop.vnsextop1.com:2096
clop.vnsextop1.com:8443
client.vnsextop1.com:80
client.vnsextop1.com:22
client.vnsextop1.com:8080
client.vnsextop1.com:8880
client.vnsextop1.com:2052
client.vnsextop1.com:2082
client.vnsextop1.com:2086
client.vnsextop1.com:2095
client.vnsextop1.com:443
client.vnsextop1.com:2053
client.vnsextop1.com:2083
client.vnsextop1.com:2087
client.vnsextop1.com:2096
client.vnsextop1.com:8443

Mutex

oJjnaqA8Caky

Attributes

delay
0
install
true
install_file
9su4bf.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/0x000e00000001c4f1-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1880	9su4bf.exe
4796	9su4bf.exe

Outbound SSH connection to public host 2 TTPs 1 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	15	185.100.234.69:22

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
2132	cmd.exe
3624	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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9su4bf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9su4bf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5908	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
4100	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
Token: SeDebugPrivilege	1880	9su4bf.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3936 wrote to memory of 3624	3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe	89
PID 3936 wrote to memory of 2132	3936	6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe	90
PID 2132 wrote to memory of 5908	2132	cmd.exe	93
PID 3624 wrote to memory of 4100	3624	cmd.exe	94
PID 2132 wrote to memory of 4796	2132	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe
"C:\Users\Admin\AppData\Local\Temp\6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3936
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "9su4bf" /tr '"C:\Users\Admin\AppData\Roaming\9su4bf.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3624
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "9su4bf" /tr '"C:\Users\Admin\AppData\Roaming\9su4bf.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4100
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD06.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2132
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5908
- - C:\Users\Admin\AppData\Roaming\9su4bf.exe
    "C:\Users\Admin\AppData\Roaming\9su4bf.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4796

C:\Users\Admin\AppData\Roaming\9su4bf.exe
"C:\Users\Admin\AppData\Roaming\9su4bf.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1880

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

tmpD06.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpD06.tmp.bat
Size 149B
SHA256 3395b4ff2aed0ae473318ee1fd77812acd9edde46e4e4717ecf30d859e5040bb
MD5 60c3f29b5fc82f99f9197b1ef3ef1039
SHA1 3f271793ff6c7c8945668f2aacb15cd8350a3e6c
SHA512 0adc6cda272a80d91619abf53760e7456e9fc0469675bcc44dc9a7b2c968d1d020814c0711327a7666152bfaf7e7ef8379035c8715f82ff382614a427ecd40c0
TLSH
T1DCC02B5251C5EA5E390D681312FAD48CA1766D1E3F40FF00C344400D228188DF0ED381
MD5 SHA1 SHA512 TLSH

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9su4bf.exe

Path C:\Users\Admin\AppData\Roaming\9su4bf.exe
Size 45KB
SHA256 6596cda794ac35c1dff4b90c92e85d6c0e931185ecb9c5bccae52c3a717d39b6
MD5 5b73086f61b492aab5030809a8d6b630
SHA1 7103429b69db0c61b2e25990a46f8e1e97b37235
SHA512 5c52c21940bebc6c019af655f10695eeeff982751455a1f0673b43fe107be1da9395731936869e7c854d942b9c28b7479fca1d4babf4a155f1c5e93a143a4e81
SSDEEP 768:5udApTNctooWUS7C+mo2qthRzMwnOPIZzjbQgX3iSm/9oEoEDqmaX+BDZ0x:5udApTNmU2qA+3Z3bXXSSm/9LjDlaXQU
TLSH
T126233C0037E8812BF2BF5F7899F26246467AF6633603D6891CC4519B5613FC6CA426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1880-12-0x00000000741C0000-0x000000007497C000-memory.dmp

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memory/1880-14-0x00000000741C0000-0x000000007497C000-memory.dmp

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memory/3936-0-0x0000000074342000-0x0000000074343000-memory.dmp

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memory/3936-1-0x0000000000D80000-0x0000000000D92000-memory.dmp

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memory/3936-2-0x0000000074330000-0x0000000074AEC000-memory.dmp

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memory/3936-3-0x0000000005780000-0x000000000581C000-memory.dmp

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memory/3936-8-0x0000000074330000-0x0000000074AEC000-memory.dmp

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