asyncrat | 71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255

Analysis

max time kernel
148s
max time network
152s
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, 11:39

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General

Target
71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
Size 45KB
Sample260804-nsfrnsvxav
SHA256 71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255
MD5 beaf05d45e71a5053951bf2980a6afc6
SHA1 59395fe97d304e14b35ee47a1a74a188df86dae4
SHA512 ec274d7f6675ed5d696e66125e1a0b55165306537203b9e0744afccab18806fcb0b5a13c670fcbec184de7f4ac8ab1c022d4934eb1d6e4eccfe909d072860707
SSDEEP 768:vuogpT78XvEsWUOsRzqmo2qrXT9Qpm9PIDzjb9gX3iFThQrspkBDZkx:vuogpT7I62AQD3bqXSFTmndkx
TLSH
T1DD230A003BE9813BF2BE4FB898F26145867AF5632603D64D6CC451DB5623BC6CA426FD
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

xcavengon.click:80
xcavengon.click:22
xcavengon.click:8080
xcavengon.click:8880
xcavengon.click:2052
xcavengon.click:2082
xcavengon.click:2086
xcavengon.click:2095
xcavengon.click:443
xcavengon.click:2053
xcavengon.click:2083
xcavengon.click:2087
xcavengon.click:2096
xcavengon.click:8443
www.xcavengon.click:80
www.xcavengon.click:22
www.xcavengon.click:8080
www.xcavengon.click:8880
www.xcavengon.click:2052
www.xcavengon.click:2082
www.xcavengon.click:2086
www.xcavengon.click:2095
www.xcavengon.click:443
www.xcavengon.click:2053
www.xcavengon.click:2083
www.xcavengon.click:2087
www.xcavengon.click:2096
www.xcavengon.click:8443
klez.xcavengon.click:80
klez.xcavengon.click:22
klez.xcavengon.click:8080
klez.xcavengon.click:8880
klez.xcavengon.click:2052
klez.xcavengon.click:2082
klez.xcavengon.click:2086
klez.xcavengon.click:2095
klez.xcavengon.click:443
klez.xcavengon.click:2053
klez.xcavengon.click:2083
klez.xcavengon.click:2087
klez.xcavengon.click:2096
klez.xcavengon.click:8443
melissa.xcavengon.click:80
melissa.xcavengon.click:22
melissa.xcavengon.click:8080
melissa.xcavengon.click:8880
melissa.xcavengon.click:2052
melissa.xcavengon.click:2082
melissa.xcavengon.click:2086
melissa.xcavengon.click:2095
melissa.xcavengon.click:443
melissa.xcavengon.click:2053
melissa.xcavengon.click:2083
melissa.xcavengon.click:2087
melissa.xcavengon.click:2096
melissa.xcavengon.click:8443
gootloader.xcavengon.click:80
gootloader.xcavengon.click:22
gootloader.xcavengon.click:8080
gootloader.xcavengon.click:8880
gootloader.xcavengon.click:2052
gootloader.xcavengon.click:2082
gootloader.xcavengon.click:2086
gootloader.xcavengon.click:2095
gootloader.xcavengon.click:443
gootloader.xcavengon.click:2053
gootloader.xcavengon.click:2083
gootloader.xcavengon.click:2087
gootloader.xcavengon.click:2096
gootloader.xcavengon.click:8443
locky.xcavengon.click:80
locky.xcavengon.click:22
locky.xcavengon.click:8080
locky.xcavengon.click:8880
locky.xcavengon.click:2052
locky.xcavengon.click:2082
locky.xcavengon.click:2086
locky.xcavengon.click:2095
locky.xcavengon.click:443
locky.xcavengon.click:2053
locky.xcavengon.click:2083
locky.xcavengon.click:2087
locky.xcavengon.click:2096
locky.xcavengon.click:8443

Mutex

wUf7xoyIcAeP

Attributes

delay
0
install
true
install_file
jk4qsi74.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/0x000e00000001c532-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5608	jk4qsi74.exe
1480	jk4qsi74.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	12	172.67.189.217:22
SSH destination	13	104.21.10.8:22

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
4564	cmd.exe
4444	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	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	jk4qsi74.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jk4qsi74.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4200	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
124	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
Token: SeDebugPrivilege	5608	jk4qsi74.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5876 wrote to memory of 4564	5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe	88
PID 5876 wrote to memory of 4444	5876	71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe	90
PID 4444 wrote to memory of 4200	4444	cmd.exe	92
PID 4564 wrote to memory of 124	4564	cmd.exe	93
PID 4444 wrote to memory of 1480	4444	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe
"C:\Users\Admin\AppData\Local\Temp\71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "jk4qsi74" /tr '"C:\Users\Admin\AppData\Roaming\jk4qsi74.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4564
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "jk4qsi74" /tr '"C:\Users\Admin\AppData\Roaming\jk4qsi74.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:124
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBD5B.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4444
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4200
- - C:\Users\Admin\AppData\Roaming\jk4qsi74.exe
    "C:\Users\Admin\AppData\Roaming\jk4qsi74.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1480

C:\Users\Admin\AppData\Roaming\jk4qsi74.exe
"C:\Users\Admin\AppData\Roaming\jk4qsi74.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5608

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

tmpBD5B.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpBD5B.tmp.bat
Size 152B
SHA256 05018bdc96ba8dd8e960ad0d87b475452f05f27bf0c3dd5f916c42fa8612e67e
MD5 e60f04080784110f8f4a9d12f25283e1
SHA1 5c7502ab1705f5a964c7ff062d8eb6bc3399e6f6
SHA512 1f6f61dd7f0902471cee6cdb0895cfd26b5f725f8ff7d9d9039c71992a94509588fdc3dd79f6c812c5b956f8eea9b91d8249241ba1336cbb4c2c8c4637db2bdb
TLSH
T111C02BB359C5EA5F6906581302FED4CE92726C1D3F40BB00CB94801D1682448F8E9381
MD5 SHA1 SHA512 TLSH

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jk4qsi74.exe

Path C:\Users\Admin\AppData\Roaming\jk4qsi74.exe
Size 45KB
SHA256 71af330a48e4799094f828e624592a6d185bf571432f31002b1908bdc67f7255
MD5 beaf05d45e71a5053951bf2980a6afc6
SHA1 59395fe97d304e14b35ee47a1a74a188df86dae4
SHA512 ec274d7f6675ed5d696e66125e1a0b55165306537203b9e0744afccab18806fcb0b5a13c670fcbec184de7f4ac8ab1c022d4934eb1d6e4eccfe909d072860707
SSDEEP 768:vuogpT78XvEsWUOsRzqmo2qrXT9Qpm9PIDzjb9gX3iFThQrspkBDZkx:vuogpT7I62AQD3bqXSFTmndkx
TLSH
T1DD230A003BE9813BF2BE4FB898F26145867AF5632603D64D6CC451DB5623BC6CA426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/5608-12-0x00000000743A0000-0x0000000074B5C000-memory.dmp

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memory/5608-14-0x00000000743A0000-0x0000000074B5C000-memory.dmp

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memory/5876-0-0x0000000074522000-0x0000000074523000-memory.dmp

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memory/5876-1-0x0000000000DA0000-0x0000000000DB2000-memory.dmp

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memory/5876-2-0x0000000074510000-0x0000000074CCC000-memory.dmp

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memory/5876-3-0x00000000057E0000-0x000000000587C000-memory.dmp

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memory/5876-8-0x0000000074510000-0x0000000074CCC000-memory.dmp

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