asyncrat | 75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb

Analysis

max time kernel
6s
max time network
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
16/07/2026, 11:17

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General

Target
75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
Size 45KB
Sample260716-nd4vysfs91
SHA256 75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb
MD5 af904582b84d08234c2903a41b7a630d
SHA1 c92658f00da3e4f587bc574ed7d3ca826cda955c
SHA512 9b6d593e7b001d9cc22750a1c740c7059c098b2407ccc89490dd103048af008c1aa06918577249d31de8b9802d932cbc9ff53c638903ecfe5a7eff96549ad449
SSDEEP 768:DuAqJT84XVvWUXR1Zmo2qjEw7/y3qiPIIzjbAgX3io+R7kiKBDZcx:DuAqJT84v2NchI3bnXSo+R7kvdcx
TLSH
T160233B003BE9C12BF2BE5FB89DF26145467AF5732A03D58D1CC4119B5713BC68A42AFA
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

fimsexnhatban.com:80
fimsexnhatban.com:22
fimsexnhatban.com:8080
fimsexnhatban.com:8880
fimsexnhatban.com:2052
fimsexnhatban.com:2082
fimsexnhatban.com:2086
fimsexnhatban.com:2095
fimsexnhatban.com:443
fimsexnhatban.com:2053
fimsexnhatban.com:2083
fimsexnhatban.com:2087
fimsexnhatban.com:2096
fimsexnhatban.com:8443
www.fimsexnhatban.com:80
www.fimsexnhatban.com:22
www.fimsexnhatban.com:8080
www.fimsexnhatban.com:8880
www.fimsexnhatban.com:2052
www.fimsexnhatban.com:2082
www.fimsexnhatban.com:2086
www.fimsexnhatban.com:2095
www.fimsexnhatban.com:443
www.fimsexnhatban.com:2053
www.fimsexnhatban.com:2083
www.fimsexnhatban.com:2087
www.fimsexnhatban.com:2096
www.fimsexnhatban.com:8443
malware.fimsexnhatban.com:80
malware.fimsexnhatban.com:22
malware.fimsexnhatban.com:8080
malware.fimsexnhatban.com:8880
malware.fimsexnhatban.com:2052
malware.fimsexnhatban.com:2082
malware.fimsexnhatban.com:2086
malware.fimsexnhatban.com:2095
malware.fimsexnhatban.com:443
malware.fimsexnhatban.com:2053
malware.fimsexnhatban.com:2083
malware.fimsexnhatban.com:2087
malware.fimsexnhatban.com:2096
malware.fimsexnhatban.com:8443
stuxnet.fimsexnhatban.com:80
stuxnet.fimsexnhatban.com:22
stuxnet.fimsexnhatban.com:8080
stuxnet.fimsexnhatban.com:8880
stuxnet.fimsexnhatban.com:2052
stuxnet.fimsexnhatban.com:2082
stuxnet.fimsexnhatban.com:2086
stuxnet.fimsexnhatban.com:2095
stuxnet.fimsexnhatban.com:443
stuxnet.fimsexnhatban.com:2053
stuxnet.fimsexnhatban.com:2083
stuxnet.fimsexnhatban.com:2087
stuxnet.fimsexnhatban.com:2096
stuxnet.fimsexnhatban.com:8443
blacklotus.fimsexnhatban.com:80
blacklotus.fimsexnhatban.com:22
blacklotus.fimsexnhatban.com:8080
blacklotus.fimsexnhatban.com:8880
blacklotus.fimsexnhatban.com:2052
blacklotus.fimsexnhatban.com:2082
blacklotus.fimsexnhatban.com:2086
blacklotus.fimsexnhatban.com:2095
blacklotus.fimsexnhatban.com:443
blacklotus.fimsexnhatban.com:2053
blacklotus.fimsexnhatban.com:2083
blacklotus.fimsexnhatban.com:2087
blacklotus.fimsexnhatban.com:2096
blacklotus.fimsexnhatban.com:8443

Mutex

D8rlfWCj8zg1

Attributes

delay
0
install
true
install_file
vjy5z40.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/0x000e00000001c535-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
244	vjy5z40.exe
4740	vjy5z40.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	vjy5z40.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vjy5z40.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
256	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
248	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
Token: SeDebugPrivilege	244	vjy5z40.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5696 wrote to memory of 4884	5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe	88
PID 5696 wrote to memory of 400	5696	75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe	90
PID 400 wrote to memory of 256	400	cmd.exe	92
PID 4884 wrote to memory of 248	4884	cmd.exe	93
PID 400 wrote to memory of 4740	400	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe
"C:\Users\Admin\AppData\Local\Temp\75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5696
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "vjy5z40" /tr '"C:\Users\Admin\AppData\Roaming\vjy5z40.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4884
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "vjy5z40" /tr '"C:\Users\Admin\AppData\Roaming\vjy5z40.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:248
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB58B.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:400
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:256
- - C:\Users\Admin\AppData\Roaming\vjy5z40.exe
    "C:\Users\Admin\AppData\Roaming\vjy5z40.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4740

C:\Users\Admin\AppData\Roaming\vjy5z40.exe
"C:\Users\Admin\AppData\Roaming\vjy5z40.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:244

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

tmpB58B.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpB58B.tmp.bat
Size 151B
SHA256 0d033706746011e8c479ee94fd670a44c853d6997cc5b063179b53e388a6bab1
MD5 e290ef4d7b85c5edeacfd5ac30895ca3
SHA1 a8788e63b065fcb5b12ef7e294e8d9ec4234e628
SHA512 44511d29e7c04cbba19a755cec6f1457e03c73580bf2b755bfc43424b194b4e5c7c635060de2dbc92ff7ba75882e83f71d532b269ad1df784c4d2e9718c55208
TLSH
T188C02B8351C9EE0F7905149312FFD49E92B2BC193F40BB10C744804E628085CF0DD3C5
MD5 SHA1 SHA512 TLSH

Submit Download

vjy5z40.exe

Path C:\Users\Admin\AppData\Roaming\vjy5z40.exe
Size 45KB
SHA256 75333badf0020526d28f904c78bf1187a60a240af91ffa2696eea22be00399cb
MD5 af904582b84d08234c2903a41b7a630d
SHA1 c92658f00da3e4f587bc574ed7d3ca826cda955c
SHA512 9b6d593e7b001d9cc22750a1c740c7059c098b2407ccc89490dd103048af008c1aa06918577249d31de8b9802d932cbc9ff53c638903ecfe5a7eff96549ad449
SSDEEP 768:DuAqJT84XVvWUXR1Zmo2qjEw7/y3qiPIIzjbAgX3io+R7kiKBDZcx:DuAqJT84v2NchI3bnXSo+R7kvdcx
TLSH
T160233B003BE9C12BF2BE5FB89DF26145467AF5732A03D58D1CC4119B5713BC68A42AFA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/244-12-0x0000000074CA0000-0x000000007545C000-memory.dmp

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memory/244-14-0x0000000074CA0000-0x000000007545C000-memory.dmp

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memory/5696-0-0x0000000074E22000-0x0000000074E23000-memory.dmp

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memory/5696-1-0x0000000000A00000-0x0000000000A12000-memory.dmp

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memory/5696-2-0x0000000074E10000-0x00000000755CC000-memory.dmp

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memory/5696-3-0x0000000005550000-0x00000000055EC000-memory.dmp

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memory/5696-8-0x0000000074E10000-0x00000000755CC000-memory.dmp

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