xworm | eb8db18db280b1d68aa5aaa05d4d6f4bdfcf9921609d2c80915f8db2bb386a0e

Reason

Machine shutdown

General

Target

XClient.exe
Size

54KB
MD5

f54070cb3f8967ad80f93d00a02a52ea
SHA1

ddef9179a43fd625d5c3f04c8f1919379de7e480
SHA256

eb8db18db280b1d68aa5aaa05d4d6f4bdfcf9921609d2c80915f8db2bb386a0e
SHA512

a605105bec3ccc2d6cb204c5ef27247653abc41ff1ef5bc5e739e19dc7308f33f136c338c94683f2cd8d97458e63298dd98b36571bde261862e2a301755a8f7d
SSDEEP

1536:om+BiZLw0HucpDIKBqCVzbiucbq0LSgZ6+LG8Or/1wB:keLicpEdQzbiur0LhS8OreB

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
behavioral2/memory/1796-1-0x0000000000340000-0x0000000000354000-memory.dmp	family_xworm
behavioral2/files/0x000c000000023b88-47.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
2536	powershell.exe
4960	powershell.exe
2808	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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	XClient.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 1 IoCs

pid	Process
1352	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-1-5-21-2045521122-590294423-3465680274-1000\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 2 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
768	ipconfig.exe
4588	ipconfig.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	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\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	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\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "64"	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
888	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2536	powershell.exe
2536	powershell.exe
4960	powershell.exe
4960	powershell.exe
2808	powershell.exe
2808	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1796	XClient.exe
Token: SeDebugPrivilege	2536	powershell.exe
Token: SeDebugPrivilege	4960	powershell.exe
Token: SeDebugPrivilege	2808	powershell.exe
Token: SeDebugPrivilege	1796	XClient.exe
Token: SeDebugPrivilege	1352	XClient.exe
Token: SeShutdownPrivilege	1692	shutdown.exe
Token: SeRemoteShutdownPrivilege	1692	shutdown.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4988	LogonUI.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1796 wrote to memory of 2536	1796	XClient.exe	91
PID 1796 wrote to memory of 2536	1796	XClient.exe	91
PID 1796 wrote to memory of 4960	1796	XClient.exe	96
PID 1796 wrote to memory of 4960	1796	XClient.exe	96
PID 1796 wrote to memory of 2808	1796	XClient.exe	99
PID 1796 wrote to memory of 2808	1796	XClient.exe	99
PID 1796 wrote to memory of 888	1796	XClient.exe	101
PID 1796 wrote to memory of 888	1796	XClient.exe	101
PID 1796 wrote to memory of 4852	1796	XClient.exe	114
PID 1796 wrote to memory of 4852	1796	XClient.exe	114
PID 4852 wrote to memory of 768	4852	CMD.EXE	116
PID 4852 wrote to memory of 768	4852	CMD.EXE	116
PID 4852 wrote to memory of 4588	4852	CMD.EXE	118
PID 4852 wrote to memory of 4588	4852	CMD.EXE	118
PID 1796 wrote to memory of 1692	1796	XClient.exe	119
PID 1796 wrote to memory of 1692	1796	XClient.exe	119

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⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1796
- 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:2536
- 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:4960
- 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:2808
- 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:888
- C:\Windows\SYSTEM32\CMD.EXE
  "CMD.EXE"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4852
- - C:\Windows\system32\ipconfig.exe
    ipconfig
    3⤵
    - Gathers network information
    PID:768
- - C:\Windows\system32\ipconfig.exe
    ipconfig
    3⤵
    - Gathers network information
    PID:4588
- C:\Windows\SYSTEM32\shutdown.exe
  shutdown.exe /f /s /t 0
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1692

C:\Windows\System32\fontview.exe
"C:\Windows\System32\fontview.exe" C:\Users\Admin\Desktop\ShowUnblock.fon
1⤵
PID:1300

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1352

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa38db855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:4988

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

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
34f595487e6bfd1d11c7de88ee50356a

SHA1
4caad088c15766cc0fa1f42009260e9a02f953bb

SHA256
0f9a4b52e01cb051052228a55d0515911b7ef5a8db3cf925528c746df511424d

SHA512
10976c5deaf9fac449e703e852c3b08d099f430de2d7c7b8e2525c35d63e28b890e5aab63feff9b20bca0aaf9f35a3ba411aee3fbeee9ea59f90ed25bd617a0b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mkwhdx5n.vz2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
54KB

MD5
f54070cb3f8967ad80f93d00a02a52ea

SHA1
ddef9179a43fd625d5c3f04c8f1919379de7e480

SHA256
eb8db18db280b1d68aa5aaa05d4d6f4bdfcf9921609d2c80915f8db2bb386a0e

SHA512
a605105bec3ccc2d6cb204c5ef27247653abc41ff1ef5bc5e739e19dc7308f33f136c338c94683f2cd8d97458e63298dd98b36571bde261862e2a301755a8f7d

Download Submit
memory/1796-49-0x00007FFE642D0000-0x00007FFE64D91000-memory.dmp

Filesize
10.8MB

Download
memory/1796-1-0x0000000000340000-0x0000000000354000-memory.dmp

Filesize
80KB

Download
memory/1796-0-0x00007FFE642D3000-0x00007FFE642D5000-memory.dmp

Filesize
8KB

Download
memory/1796-50-0x00007FFE642D0000-0x00007FFE64D91000-memory.dmp

Filesize
10.8MB

Download
memory/1796-51-0x000000001AF10000-0x000000001AF1A000-memory.dmp

Filesize
40KB

Download
memory/1796-55-0x000000001AE60000-0x000000001AE6A000-memory.dmp

Filesize
40KB

Download
memory/1796-57-0x00007FFE642D0000-0x00007FFE64D91000-memory.dmp

Filesize
10.8MB

Download
memory/2536-14-0x00007FFE642D0000-0x00007FFE64D91000-memory.dmp

Filesize
10.8MB

Download
memory/2536-17-0x00007FFE642D0000-0x00007FFE64D91000-memory.dmp

Filesize
10.8MB

Download
memory/2536-13-0x00007FFE642D0000-0x00007FFE64D91000-memory.dmp

Filesize
10.8MB

Download
memory/2536-12-0x00007FFE642D0000-0x00007FFE64D91000-memory.dmp

Filesize
10.8MB

Download
memory/2536-8-0x000001A91FB60000-0x000001A91FB82000-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