asyncrat | 81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83

Analysis

max time kernel
148s
max time network
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
01/08/2026, 14:56

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General

Target
81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
Size 45KB
Sample260801-sbfgsscc27
SHA256 81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83
MD5 57f0f84c6748ebdd1d79085dbe2be7a8
SHA1 68c5816ec9b1ba6e3166a68f67014f15f1b1b463
SHA512 98f6dc44ef9be9cfbdcc587501f60866a520281b5bd518e39bff7a002fdd1858676ea35fbf830572a49fa47f41bf048b0b720870243f38466be7638bd20a9026
SSDEEP 768:0uPrpT/LGKeWUszuAmo2q9y9Y6kq/zNOPIyzjbagR3iUhkl2mbBe8JCHiBDZ8x:0uPrpT/qY2va9C3y3bNRSUSlR7d8x
TLSH
T19F233B003BE8C12BF2BE5F7899F26145867AF5633603D64A1CC411DB5623FC68A526FE
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

sexvietdam.blog:80
sexvietdam.blog:22
sexvietdam.blog:8080
sexvietdam.blog:8880
sexvietdam.blog:2052
sexvietdam.blog:2082
sexvietdam.blog:2086
sexvietdam.blog:2095
sexvietdam.blog:443
sexvietdam.blog:2053
sexvietdam.blog:2083
sexvietdam.blog:2087
sexvietdam.blog:2096
sexvietdam.blog:8443
www.sexvietdam.blog:80
www.sexvietdam.blog:22
www.sexvietdam.blog:8080
www.sexvietdam.blog:8880
www.sexvietdam.blog:2052
www.sexvietdam.blog:2082
www.sexvietdam.blog:2086
www.sexvietdam.blog:2095
www.sexvietdam.blog:443
www.sexvietdam.blog:2053
www.sexvietdam.blog:2083
www.sexvietdam.blog:2087
www.sexvietdam.blog:2096
www.sexvietdam.blog:8443
nimda.sexvietdam.blog:80
nimda.sexvietdam.blog:22
nimda.sexvietdam.blog:8080
nimda.sexvietdam.blog:8880
nimda.sexvietdam.blog:2052
nimda.sexvietdam.blog:2082
nimda.sexvietdam.blog:2086
nimda.sexvietdam.blog:2095
nimda.sexvietdam.blog:443
nimda.sexvietdam.blog:2053
nimda.sexvietdam.blog:2083
nimda.sexvietdam.blog:2087
nimda.sexvietdam.blog:2096
nimda.sexvietdam.blog:8443
malware.sexvietdam.blog:80
malware.sexvietdam.blog:22
malware.sexvietdam.blog:8080
malware.sexvietdam.blog:8880
malware.sexvietdam.blog:2052
malware.sexvietdam.blog:2082
malware.sexvietdam.blog:2086
malware.sexvietdam.blog:2095
malware.sexvietdam.blog:443
malware.sexvietdam.blog:2053
malware.sexvietdam.blog:2083
malware.sexvietdam.blog:2087
malware.sexvietdam.blog:2096
malware.sexvietdam.blog:8443

Mutex

WEF5oMeooWVV

Attributes

delay
0
install
true
install_file
392biuh.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/0x000a00000001b89b-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5628	392biuh.exe
2128	392biuh.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	13	175.110.122.88:22

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
1316	cmd.exe
5104	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	392biuh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.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	392biuh.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2312	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
4640	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
Token: SeDebugPrivilege	5628	392biuh.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4828 wrote to memory of 1316	4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe	90
PID 4828 wrote to memory of 5104	4828	81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe	91
PID 1316 wrote to memory of 4640	1316	cmd.exe	94
PID 5104 wrote to memory of 2312	5104	cmd.exe	95
PID 5104 wrote to memory of 2128	5104	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe
"C:\Users\Admin\AppData\Local\Temp\81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4828
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "392biuh" /tr '"C:\Users\Admin\AppData\Roaming\392biuh.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1316
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "392biuh" /tr '"C:\Users\Admin\AppData\Roaming\392biuh.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4640
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8D52.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5104
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2312
- - C:\Users\Admin\AppData\Roaming\392biuh.exe
    "C:\Users\Admin\AppData\Roaming\392biuh.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2128

C:\Users\Admin\AppData\Roaming\392biuh.exe
"C:\Users\Admin\AppData\Roaming\392biuh.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5628

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

Replay Monitor

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Downloads

tmp8D52.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8D52.tmp.bat
Size 151B
SHA256 19b92259ef5986e6427210130910562ced9f779c931e93407968121f4b1a26dd
MD5 cf3f7606e556a8491a5aadf6a078465f
SHA1 40f3ccf0591d366c3a042762cacbbd2c736ac44b
SHA512 08c66ff6b25f00ed5bd19d1372890902ebf76249e367c06782dfde52bd3f312d8cb926712bcf361f8a646a2b9e133dc641bd4a016cc758149d7ac876b3644bf5
TLSH
T181C02B8269CAEA4EB905E8630BFAD8CC917A6D193F84FB00D344802D22C0448F4DD341
MD5 SHA1 SHA512 TLSH

Submit Download

392biuh.exe

Path C:\Users\Admin\AppData\Roaming\392biuh.exe
Size 45KB
SHA256 81f4d1c747f527b9c0bafd62447bacd93bfc89d308227a0330085778a7decc83
MD5 57f0f84c6748ebdd1d79085dbe2be7a8
SHA1 68c5816ec9b1ba6e3166a68f67014f15f1b1b463
SHA512 98f6dc44ef9be9cfbdcc587501f60866a520281b5bd518e39bff7a002fdd1858676ea35fbf830572a49fa47f41bf048b0b720870243f38466be7638bd20a9026
SSDEEP 768:0uPrpT/LGKeWUszuAmo2q9y9Y6kq/zNOPIyzjbagR3iUhkl2mbBe8JCHiBDZ8x:0uPrpT/qY2va9C3y3bNRSUSlR7d8x
TLSH
T19F233B003BE8C12BF2BE5F7899F26145867AF5633603D64A1CC411DB5623FC68A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4828-0-0x0000000074342000-0x0000000074343000-memory.dmp

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memory/4828-1-0x00000000001B0000-0x00000000001C2000-memory.dmp

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memory/4828-2-0x0000000074330000-0x0000000074AEC000-memory.dmp

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memory/4828-3-0x0000000004BA0000-0x0000000004C3C000-memory.dmp

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memory/4828-8-0x0000000074330000-0x0000000074AEC000-memory.dmp

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memory/5628-12-0x00000000741C0000-0x000000007497C000-memory.dmp

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memory/5628-14-0x00000000741C0000-0x000000007497C000-memory.dmp

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