xworm | 926ba0df92e1f9b1841c1b04e4d101cbc3ce9c8019f6ac3c717380cd85643f92

Reason

Machine shutdown

General

Target

Steam.exe
Size

80KB
MD5

925c5ac8505847f51b4dbef340716238
SHA1

ecfb0b836deb64fa714f0cfc7f41e0f68e85c762
SHA256

926ba0df92e1f9b1841c1b04e4d101cbc3ce9c8019f6ac3c717380cd85643f92
SHA512

0780eb215f0caee0d63dddbceffb37c498729024957db8347f8df26a2a1df26138275bebfdd595f29549e2c775cd226c9980850daced72809e0b148e1b4c84c6
SSDEEP

1536:+v1oTUiT1jJuO+uSjic+b7LIafbVe66xFtOGZPSUQ:ASXu6Sj1+b7EeAtOG4N

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

help-wt.gl.at.ply.gg:60294

Attributes

Install_directory
%AppData%
install_file
Steam.exe

Signatures

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

Processes:

resource	yara_rule
behavioral2/memory/4304-77-0x000000001C580000-0x000000001C58E000-memory.dmp	disable_win_def

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4304-1-0x0000000000F80000-0x0000000000F9A000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\Steam.exe	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

2508 powershell.exe
5084 powershell.exe
2360 powershell.exe
1932 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

Processes:

Steam.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation Steam.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	Steam.exe

Drops startup file 2 IoCs

Processes:

Steam.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Steam.lnk	Steam.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Steam.lnk	Steam.exe

Executes dropped EXE 2 IoCs

Processes:

Steam.exeSteam.exe

pid process

1612 Steam.exe
1816 Steam.exe

pid	process
1612	Steam.exe
1816	Steam.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Steam.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Steam = "C:\\Users\\Admin\\AppData\\Roaming\\Steam.exe"	Steam.exe

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

System Information Discovery
T1082
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

Processes:

schtasks.exe

pid process

4712 schtasks.exe

pid	process
4712	schtasks.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "217"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

Steam.exe

pid process

4304 Steam.exe

pid	process
4304	Steam.exe

Suspicious behavior: EnumeratesProcesses 51 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeSteam.exe

pid	process
2508	powershell.exe
2508	powershell.exe
5084	powershell.exe
5084	powershell.exe
2360	powershell.exe
2360	powershell.exe
1932	powershell.exe
1932	powershell.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe
4304	Steam.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

Processes:

Steam.exepowershell.exepowershell.exepowershell.exepowershell.exeSteam.exeSteam.exeshutdown.exe

description	pid	process
Token: SeDebugPrivilege	4304	Steam.exe
Token: SeDebugPrivilege	2508	powershell.exe
Token: SeDebugPrivilege	5084	powershell.exe
Token: SeDebugPrivilege	2360	powershell.exe
Token: SeDebugPrivilege	1932	powershell.exe
Token: SeDebugPrivilege	4304	Steam.exe
Token: SeDebugPrivilege	1612	Steam.exe
Token: SeDebugPrivilege	1816	Steam.exe
Token: SeShutdownPrivilege	4688	shutdown.exe
Token: SeRemoteShutdownPrivilege	4688	shutdown.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

Steam.exeLogonUI.exe

pid process

4304 Steam.exe
4304 Steam.exe
904 LogonUI.exe

pid	process
4304	Steam.exe
4304	Steam.exe
904	LogonUI.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

Steam.exe

description	pid	process	target process
PID 4304 wrote to memory of 2508	4304	Steam.exe	powershell.exe
PID 4304 wrote to memory of 2508	4304	Steam.exe	powershell.exe
PID 4304 wrote to memory of 5084	4304	Steam.exe	powershell.exe
PID 4304 wrote to memory of 5084	4304	Steam.exe	powershell.exe
PID 4304 wrote to memory of 2360	4304	Steam.exe	powershell.exe
PID 4304 wrote to memory of 2360	4304	Steam.exe	powershell.exe
PID 4304 wrote to memory of 1932	4304	Steam.exe	powershell.exe
PID 4304 wrote to memory of 1932	4304	Steam.exe	powershell.exe
PID 4304 wrote to memory of 4712	4304	Steam.exe	schtasks.exe
PID 4304 wrote to memory of 4712	4304	Steam.exe	schtasks.exe
PID 4304 wrote to memory of 4688	4304	Steam.exe	shutdown.exe
PID 4304 wrote to memory of 4688	4304	Steam.exe	shutdown.exe

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:\Users\Admin\AppData\Local\Temp\Steam.exe
"C:\Users\Admin\AppData\Local\Temp\Steam.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4304

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Steam.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2508

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Steam.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5084

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Steam.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2360

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Steam.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1932

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Steam" /tr "C:\Users\Admin\AppData\Roaming\Steam.exe"
2⤵
- Creates scheduled task(s)
PID:4712

C:\Windows\SYSTEM32\shutdown.exe
shutdown.exe /f /s /t 0
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4688

C:\Users\Admin\AppData\Roaming\Steam.exe
C:\Users\Admin\AppData\Roaming\Steam.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1612

C:\Users\Admin\AppData\Roaming\Steam.exe
C:\Users\Admin\AppData\Roaming\Steam.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1816

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3928855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:904

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Steam.exe.log
Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
46b170302a5821687d8c622f10947f27

SHA1
47a91ea3e248bd99dc87211be7e2844dda0687df

SHA256
e3cdd1b49dca63bf255aead7a7535cc6fc085425ff5ac48975d62c37af6a689e

SHA512
e6f9e562876591cb959d5650cf9ef1eb2a87d5a154bd5f8c37f6697c7fd48d959014bcb2aab96b9c41498a465e9d0f114be276514e2be59dcb019334e3dfe7cb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
0aa63dbb46d451e47a7a682c64af776d

SHA1
3b0026f2dae8e9c491ccaa40133755779de35aaa

SHA256
9158038718d41172c22a3c1a15852405e3e1c8e2c44fa066328eb1520e5d977b

SHA512
4d2564850c2ab1bc71089412f19147df4a1cd3075aa2039aa894271b333cd9c510b7ba4d70889f24d45d8b366d8b5167abdcf24314e4753420337c7d34e7c43f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uy40s0ng.rew.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Steam.exe
Filesize
80KB

MD5
925c5ac8505847f51b4dbef340716238

SHA1
ecfb0b836deb64fa714f0cfc7f41e0f68e85c762

SHA256
926ba0df92e1f9b1841c1b04e4d101cbc3ce9c8019f6ac3c717380cd85643f92

SHA512
0780eb215f0caee0d63dddbceffb37c498729024957db8347f8df26a2a1df26138275bebfdd595f29549e2c775cd226c9980850daced72809e0b148e1b4c84c6

Download Submit
memory/2508-17-0x00007FFF04090000-0x00007FFF04B51000-memory.dmp

Filesize
10.8MB

Download
memory/2508-14-0x00007FFF04090000-0x00007FFF04B51000-memory.dmp

Filesize
10.8MB

Download
memory/2508-13-0x00007FFF04090000-0x00007FFF04B51000-memory.dmp

Filesize
10.8MB

Download
memory/2508-12-0x00007FFF04090000-0x00007FFF04B51000-memory.dmp

Filesize
10.8MB

Download
memory/2508-2-0x0000020774EE0000-0x0000020774F02000-memory.dmp

Filesize
136KB

Download
memory/4304-57-0x00007FFF04093000-0x00007FFF04095000-memory.dmp

Filesize
8KB

Download
memory/4304-56-0x00007FFF04090000-0x00007FFF04B51000-memory.dmp

Filesize
10.8MB

Download
memory/4304-58-0x00007FFF04090000-0x00007FFF04B51000-memory.dmp

Filesize
10.8MB

Download
memory/4304-0-0x00007FFF04093000-0x00007FFF04095000-memory.dmp

Filesize
8KB

Download
memory/4304-62-0x00000000017B0000-0x00000000017BA000-memory.dmp

Filesize
40KB

Download
memory/4304-77-0x000000001C580000-0x000000001C58E000-memory.dmp

Filesize
56KB

Download
memory/4304-1-0x0000000000F80000-0x0000000000F9A000-memory.dmp

Filesize
104KB

Download
memory/4304-80-0x00007FFF04090000-0x00007FFF04B51000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads