xworm | 89055b8db329f28180bdd72d02227f175a46b79b470c5131e932d235104ab6e1

Reason

Machine shutdown

General

Target

XClient.exe
Size

43KB
MD5

7e71f66eb4bd975fa6894f7be63d9de7
SHA1

a0b6a69adffde7a5209498ce1656f0d406da9204
SHA256

89055b8db329f28180bdd72d02227f175a46b79b470c5131e932d235104ab6e1
SHA512

5a776de6708ffa802700febe9a6a1cd95cd907f8d435c7ea28644c3c31565e373223b8db05ca142cb5bdc0d13745fba03099edbfc2fe7f9095232a997cdf6bf1
SSDEEP

768:vSniTSIuNNk3MO56kjBbvSevz5zbbTf8EmZPcBH6clOQhAGb:oiT9n6k5zbHf8PZP8H6OOQC8

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

147.185.221.23:53631

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/2992-1-0x0000000000170000-0x0000000000182000-memory.dmp	family_xworm
behavioral1/files/0x002100000002aac6-46.dat	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4820	powershell.exe
3388	powershell.exe
2716	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 4 IoCs

pid	Process
4768	XClient.exe
4196	XClient.exe
1972	XClient.exe
2300	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-556537508-2730415644-482548075-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

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

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
3728	ipconfig.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292114432"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292114432"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "14"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4290799360"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	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
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
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365268"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365268"	LogonUI.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2672	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4820	powershell.exe
4820	powershell.exe
3388	powershell.exe
3388	powershell.exe
2716	powershell.exe
2716	powershell.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	2992	XClient.exe
Token: SeDebugPrivilege	4820	powershell.exe
Token: SeDebugPrivilege	3388	powershell.exe
Token: SeDebugPrivilege	2716	powershell.exe
Token: SeDebugPrivilege	4768	XClient.exe
Token: SeDebugPrivilege	4196	XClient.exe
Token: SeDebugPrivilege	1972	XClient.exe
Token: SeDebugPrivilege	2300	XClient.exe
Token: SeShutdownPrivilege	3124	shutdown.exe
Token: SeRemoteShutdownPrivilege	3124	shutdown.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3592	PickerHost.exe
3600	LogonUI.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 4820	2992	XClient.exe	80
PID 2992 wrote to memory of 4820	2992	XClient.exe	80
PID 2992 wrote to memory of 3388	2992	XClient.exe	82
PID 2992 wrote to memory of 3388	2992	XClient.exe	82
PID 2992 wrote to memory of 2716	2992	XClient.exe	84
PID 2992 wrote to memory of 2716	2992	XClient.exe	84
PID 2992 wrote to memory of 2672	2992	XClient.exe	86
PID 2992 wrote to memory of 2672	2992	XClient.exe	86
PID 2992 wrote to memory of 2896	2992	XClient.exe	92
PID 2992 wrote to memory of 2896	2992	XClient.exe	92
PID 2896 wrote to memory of 3728	2896	CMD.EXE	94
PID 2896 wrote to memory of 3728	2896	CMD.EXE	94
PID 2896 wrote to memory of 3124	2896	CMD.EXE	96
PID 2896 wrote to memory of 3124	2896	CMD.EXE	96

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2992
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4820
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3388
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2716
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2672
- C:\Windows\SYSTEM32\CMD.EXE
  "CMD.EXE"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2896
- - C:\Windows\system32\ipconfig.exe
    ipconfig
    3⤵
    - Gathers network information
    PID:3728
- - C:\Windows\system32\shutdown.exe
    shutdown /r
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3124

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4768

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4196

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1972

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2300

C:\Windows\System32\PickerHost.exe
C:\Windows\System32\PickerHost.exe -Embedding
1⤵
- Suspicious use of SetWindowsHookEx
PID:3592

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1796

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3a0d855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:3600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

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
d0a4a3b9a52b8fe3b019f6cd0ef3dad6

SHA1
fed70ce7834c3b97edbd078eccda1e5effa527cd

SHA256
21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

SHA512
1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

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

Filesize
944B

MD5
a2bbc674f8c16bfcf3603c95d1cf5580

SHA1
5885355f588a6277c327df3adad85bb9643041ac

SHA256
2058a0079786dd5d5b9b86d558fa117a2f3f7ef7f4772e7ce6f63e7126c40cbd

SHA512
441889f97a84c57b490e4168f4de642fb63ea6a49f05d7ac55f57cc5f829dc79aa0a6f11ac7682417dca70f814c4d2849dcbcf82cbe47372dd20576091ee9998

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3elnnzut.41e.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
43KB

MD5
7e71f66eb4bd975fa6894f7be63d9de7

SHA1
a0b6a69adffde7a5209498ce1656f0d406da9204

SHA256
89055b8db329f28180bdd72d02227f175a46b79b470c5131e932d235104ab6e1

SHA512
5a776de6708ffa802700febe9a6a1cd95cd907f8d435c7ea28644c3c31565e373223b8db05ca142cb5bdc0d13745fba03099edbfc2fe7f9095232a997cdf6bf1

Download Submit
memory/2992-59-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/2992-0-0x00007FFB5DE53000-0x00007FFB5DE55000-memory.dmp

Filesize
8KB

Download
memory/2992-57-0x0000000000A30000-0x0000000000A3A000-memory.dmp

Filesize
40KB

Download
memory/2992-1-0x0000000000170000-0x0000000000182000-memory.dmp

Filesize
72KB

Download
memory/2992-49-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/2992-48-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/2992-45-0x00007FFB5DE53000-0x00007FFB5DE55000-memory.dmp

Filesize
8KB

Download
memory/4820-11-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/4820-17-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/4820-16-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/4820-13-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/4820-12-0x00007FFB5DE50000-0x00007FFB5E912000-memory.dmp

Filesize
10.8MB

Download
memory/4820-2-0x000001F6BAC20000-0x000001F6BAC42000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads