asyncrat | f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772

Analysis

max time kernel
148s
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
05/09/2026, 11:13

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General

Target
f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
Size 45KB
Sample260905-nbpm9atanf
SHA256 f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772
MD5 32e96570b4b0b7dd6c0d3c0d8cae8ecd
SHA1 e8cc6c84b5417d4b4395f5202a0e93ae8dd3fe70
SHA512 501eeca218cb4a830e2a8373be8549c4fd7c0f0acf8f3a037ec8f4c828b8a427cca7ea025f5f21574166994d919021b733d98a0404d54a62897f57e773b2ad12
SSDEEP 768:kuSOpTPTCFcWUeXa6mo2qAeQ0u3+/vPPjZPIvzjbOg/3iXRmpjcCRdL5/B4BDZMx:kuSOpTPOP2Oi32/jWv3bx/SASCRp3+dO
TLSH
T130233B003BE9812BF2BE4F7869F26245867AF5733603D54A1CC451DB5613FC6CA42AEE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

topsexviet.one:80
topsexviet.one:22
topsexviet.one:8080
topsexviet.one:8880
topsexviet.one:2052
topsexviet.one:2082
topsexviet.one:2086
topsexviet.one:2095
topsexviet.one:443
topsexviet.one:2053
topsexviet.one:2083
topsexviet.one:2087
topsexviet.one:2096
topsexviet.one:8443
www.topsexviet.one:80
www.topsexviet.one:22
www.topsexviet.one:8080
www.topsexviet.one:8880
www.topsexviet.one:2052
www.topsexviet.one:2082
www.topsexviet.one:2086
www.topsexviet.one:2095
www.topsexviet.one:443
www.topsexviet.one:2053
www.topsexviet.one:2083
www.topsexviet.one:2087
www.topsexviet.one:2096
www.topsexviet.one:8443
azorult.topsexviet.one:80
azorult.topsexviet.one:22
azorult.topsexviet.one:8080
azorult.topsexviet.one:8880
azorult.topsexviet.one:2052
azorult.topsexviet.one:2082
azorult.topsexviet.one:2086
azorult.topsexviet.one:2095
azorult.topsexviet.one:443
azorult.topsexviet.one:2053
azorult.topsexviet.one:2083
azorult.topsexviet.one:2087
azorult.topsexviet.one:2096
azorult.topsexviet.one:8443
clop.topsexviet.one:80
clop.topsexviet.one:22
clop.topsexviet.one:8080
clop.topsexviet.one:8880
clop.topsexviet.one:2052
clop.topsexviet.one:2082
clop.topsexviet.one:2086
clop.topsexviet.one:2095
clop.topsexviet.one:443
clop.topsexviet.one:2053
clop.topsexviet.one:2083
clop.topsexviet.one:2087
clop.topsexviet.one:2096
clop.topsexviet.one:8443
hacker.topsexviet.one:80
hacker.topsexviet.one:22
hacker.topsexviet.one:8080
hacker.topsexviet.one:8880
hacker.topsexviet.one:2052
hacker.topsexviet.one:2082
hacker.topsexviet.one:2086
hacker.topsexviet.one:2095
hacker.topsexviet.one:443
hacker.topsexviet.one:2053
hacker.topsexviet.one:2083
hacker.topsexviet.one:2087
hacker.topsexviet.one:2096
hacker.topsexviet.one:8443
trisis.topsexviet.one:80
trisis.topsexviet.one:22
trisis.topsexviet.one:8080
trisis.topsexviet.one:8880
trisis.topsexviet.one:2052
trisis.topsexviet.one:2082
trisis.topsexviet.one:2086
trisis.topsexviet.one:2095
trisis.topsexviet.one:443
trisis.topsexviet.one:2053
trisis.topsexviet.one:2083
trisis.topsexviet.one:2087
trisis.topsexviet.one:2096
trisis.topsexviet.one:8443

Mutex

BCYJtDqsuIwS

Attributes

delay
0
install
true
install_file
z4sm.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/0x000e00000001c42d-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
6012	z4sm.exe
2120	z4sm.exe

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
1500	cmd.exe
3360	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	z4sm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.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	z4sm.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2008	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
3128	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
Token: SeDebugPrivilege	6012	z4sm.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3480 wrote to memory of 1500	3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe	89
PID 3480 wrote to memory of 3360	3480	f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe	90
PID 1500 wrote to memory of 3128	1500	cmd.exe	93
PID 3360 wrote to memory of 2008	3360	cmd.exe	94
PID 3360 wrote to memory of 2120	3360	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe
"C:\Users\Admin\AppData\Local\Temp\f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3480
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "z4sm" /tr '"C:\Users\Admin\AppData\Roaming\z4sm.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1500
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "z4sm" /tr '"C:\Users\Admin\AppData\Roaming\z4sm.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3128
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1E4C.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3360
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2008
- - C:\Users\Admin\AppData\Roaming\z4sm.exe
    "C:\Users\Admin\AppData\Roaming\z4sm.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2120

C:\Users\Admin\AppData\Roaming\z4sm.exe
"C:\Users\Admin\AppData\Roaming\z4sm.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:6012

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp1E4C.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1E4C.tmp.bat
Size 148B
SHA256 51edead2d2b5ba512847c5faadc2f844f0dccb0c265e87068813c017e1a7d1dd
MD5 b0cc4bba7ae562c7f621ac766bfccec1
SHA1 c4a640cfb97df0a0cc6ba6fc3ba4ea091712bd41
SHA512 8872bf84111a82fa5208e6015ef191c0996a5ab975b2c99f3b7c6904f7fdbdeb46d071a3f5c99df5e8839894f1d0ba13f13e5d39d9bbc788a7c681fc20b71f3b
TLSH
T158C02B8761C5EE1F3D09242322FAD88CA1727C1D3F48FB04C784842D1280448F0D9385
MD5 SHA1 SHA512 TLSH

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z4sm.exe

Path C:\Users\Admin\AppData\Roaming\z4sm.exe
Size 45KB
SHA256 f9484ab4c3a55aded7da3e26b2f3adcfd9edc4e385c1c644f44f7e2d74ff8772
MD5 32e96570b4b0b7dd6c0d3c0d8cae8ecd
SHA1 e8cc6c84b5417d4b4395f5202a0e93ae8dd3fe70
SHA512 501eeca218cb4a830e2a8373be8549c4fd7c0f0acf8f3a037ec8f4c828b8a427cca7ea025f5f21574166994d919021b733d98a0404d54a62897f57e773b2ad12
SSDEEP 768:kuSOpTPTCFcWUeXa6mo2qAeQ0u3+/vPPjZPIvzjbOg/3iXRmpjcCRdL5/B4BDZMx:kuSOpTPOP2Oi32/jWv3bx/SASCRp3+dO
TLSH
T130233B003BE9812BF2BE4F7869F26245867AF5733603D54A1CC451DB5613FC6CA42AEE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3480-0-0x0000000074FF2000-0x0000000074FF3000-memory.dmp

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memory/3480-1-0x0000000000E50000-0x0000000000E62000-memory.dmp

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memory/3480-2-0x0000000074FE0000-0x000000007579C000-memory.dmp

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memory/3480-3-0x00000000059C0000-0x0000000005A5C000-memory.dmp

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memory/3480-8-0x0000000074FE0000-0x000000007579C000-memory.dmp

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memory/6012-12-0x0000000074E40000-0x00000000755FC000-memory.dmp

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memory/6012-14-0x0000000074E40000-0x00000000755FC000-memory.dmp

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