asyncrat | 4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235

Analysis

max time kernel
6s
max time network
149s
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, 11:55

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General

Target
4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
Size 45KB
Sample260907-n3sh8ahn4x
SHA256 4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235
MD5 288beaa026806d4d85b38181c3866c80
SHA1 65b4941abf1341ab6570105f6536885004f466a6
SHA512 222fe6977fd59831324da5df31cbc8703d125b50769cb2cdfd2a17603523d04e525010dcfe4d8428711ad3095c63ee8a6ab07c40a1446de9c1b33cc0be2c5c9a
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlRhk6K7OOPIzzjbRge3i7KqooCgTYIaJVOPuBDZO:wuDWZTpMZSB2I6VO3z3beeSOtoF9aJVI
TLSH
T129232A003BE8822BF2BE4F7899F26145467AF6B33503D64D1CC4529B5613FC69A426FE
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
ursnif.vnsextop1.com:80
ursnif.vnsextop1.com:22
ursnif.vnsextop1.com:8080
ursnif.vnsextop1.com:8880
ursnif.vnsextop1.com:2052
ursnif.vnsextop1.com:2082
ursnif.vnsextop1.com:2086
ursnif.vnsextop1.com:2095
ursnif.vnsextop1.com:443
ursnif.vnsextop1.com:2053
ursnif.vnsextop1.com:2083
ursnif.vnsextop1.com:2087
ursnif.vnsextop1.com:2096
ursnif.vnsextop1.com:8443
conti.vnsextop1.com:80
conti.vnsextop1.com:22
conti.vnsextop1.com:8080
conti.vnsextop1.com:8880
conti.vnsextop1.com:2052
conti.vnsextop1.com:2082
conti.vnsextop1.com:2086
conti.vnsextop1.com:2095
conti.vnsextop1.com:443
conti.vnsextop1.com:2053
conti.vnsextop1.com:2083
conti.vnsextop1.com:2087
conti.vnsextop1.com:2096
conti.vnsextop1.com:8443

Mutex

h1jCsj1QPy9a

Attributes

delay
0
install
true
install_file
v91ch.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/0x000d00000001c5b9-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
4964	v91ch.exe
3376	v91ch.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	13	104.18.31.167:22
SSH destination	11	104.18.30.167:22

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
5908	cmd.exe
4664	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	v91ch.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.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	v91ch.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
2888	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
Token: SeDebugPrivilege	4964	v91ch.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5032 wrote to memory of 5908	5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe	89
PID 5032 wrote to memory of 4664	5032	4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe	91
PID 5908 wrote to memory of 2888	5908	cmd.exe	93
PID 4664 wrote to memory of 4784	4664	cmd.exe	94
PID 4664 wrote to memory of 3376	4664	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe
"C:\Users\Admin\AppData\Local\Temp\4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5032
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "v91ch" /tr '"C:\Users\Admin\AppData\Roaming\v91ch.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5908
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "v91ch" /tr '"C:\Users\Admin\AppData\Roaming\v91ch.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2888
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp981F.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4664
- - 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\v91ch.exe
    "C:\Users\Admin\AppData\Roaming\v91ch.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3376

C:\Users\Admin\AppData\Roaming\v91ch.exe
"C:\Users\Admin\AppData\Roaming\v91ch.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4964

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

tmp981F.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp981F.tmp.bat
Size 149B
SHA256 d2f52c58c8264d7038642969528379d162570908a6da24ac26f867e5db5b77da
MD5 8524c01cd77d727a1625cd3cc54d97ae
SHA1 6d7d5cd631d54c9dd4074444dc6b1fdf5b511ae8
SHA512 22b2c467f6061dcafde27ac043a4a50763cd819d1b12b59c2ecf10175391cfd34ad8384f86762564fa758b655403ab6e746a7f041d34cb786ae6c88a82063f1a
TLSH
T124C02B5351C9EA4E3D09145302FED49C917B6C593F80BB00D704400D268044AF0D9342
MD5 SHA1 SHA512 TLSH

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v91ch.exe

Path C:\Users\Admin\AppData\Roaming\v91ch.exe
Size 45KB
SHA256 4fac172919ce34362349f3dac75af6c18984ace719c374f0d46b2569f8d46235
MD5 288beaa026806d4d85b38181c3866c80
SHA1 65b4941abf1341ab6570105f6536885004f466a6
SHA512 222fe6977fd59831324da5df31cbc8703d125b50769cb2cdfd2a17603523d04e525010dcfe4d8428711ad3095c63ee8a6ab07c40a1446de9c1b33cc0be2c5c9a
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlRhk6K7OOPIzzjbRge3i7KqooCgTYIaJVOPuBDZO:wuDWZTpMZSB2I6VO3z3beeSOtoF9aJVI
TLSH
T129232A003BE8822BF2BE4F7899F26145467AF6B33503D64D1CC4529B5613FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4964-12-0x0000000074900000-0x00000000750BC000-memory.dmp

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memory/4964-14-0x0000000074900000-0x00000000750BC000-memory.dmp

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memory/5032-0-0x0000000074B12000-0x0000000074B13000-memory.dmp

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memory/5032-1-0x0000000000B20000-0x0000000000B32000-memory.dmp

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memory/5032-2-0x0000000074B00000-0x00000000752BC000-memory.dmp

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memory/5032-3-0x0000000005840000-0x00000000058DC000-memory.dmp

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memory/5032-8-0x0000000074B00000-0x00000000752BC000-memory.dmp

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