xworm | 799e38a2d934e537b2f1caf0803549a16f436b36c75d370f82d8565fa707945a

Reason

Machine shutdown

General

Target

PassatHook.exe
Size

81KB
MD5

6a94bba080aa0680e802f11fc15f3097
SHA1

5c02939054e727378cb0b53d33cf10fbce153ab8
SHA256

799e38a2d934e537b2f1caf0803549a16f436b36c75d370f82d8565fa707945a
SHA512

4de71ce1b3f3de66626a03f136f19f49bd9df9bafc1ded49e1df4c2ee4466e05e8e6c8de88ee45f36118d8d2f5c5194641ba4382fada02d34be2dccfe544c84e
SSDEEP

1536:jV8pE5LncGZb7ivIUn72/aN6nnOP8YKqX:jV8mncCb2jeOE0X

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

yet-involving.gl.at.ply.gg:21072

Attributes

Install_directory
%AppData%
install_file
Perm.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2908-1-0x0000000000170000-0x000000000018A000-memory.dmp	family_xworm
behavioral2/files/0x000b000000023cc2-60.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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1868	powershell.exe
3012	powershell.exe
1628	powershell.exe
3096	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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	PassatHook.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
4908	Perm.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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Perm = "C:\\Users\\Admin\\AppData\\Roaming\\Perm.exe"	PassatHook.exe

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
15	ip-api.com

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

System Information Discovery
T1082

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	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\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	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\Themes\History\AutoColor = "0"	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\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "234"	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\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	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
5004	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1868	powershell.exe
1868	powershell.exe
3012	powershell.exe
3012	powershell.exe
1628	powershell.exe
1628	powershell.exe
3096	powershell.exe
3096	powershell.exe
2908	PassatHook.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2908	PassatHook.exe
Token: SeDebugPrivilege	1868	powershell.exe
Token: SeDebugPrivilege	3012	powershell.exe
Token: SeDebugPrivilege	1628	powershell.exe
Token: SeDebugPrivilege	3096	powershell.exe
Token: SeDebugPrivilege	2908	PassatHook.exe
Token: SeDebugPrivilege	4908	Perm.exe
Token: SeShutdownPrivilege	2604	shutdown.exe
Token: SeRemoteShutdownPrivilege	2604	shutdown.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2908	PassatHook.exe
432	LogonUI.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2908 wrote to memory of 1868	2908	PassatHook.exe	88
PID 2908 wrote to memory of 1868	2908	PassatHook.exe	88
PID 2908 wrote to memory of 3012	2908	PassatHook.exe	90
PID 2908 wrote to memory of 3012	2908	PassatHook.exe	90
PID 2908 wrote to memory of 1628	2908	PassatHook.exe	92
PID 2908 wrote to memory of 1628	2908	PassatHook.exe	92
PID 2908 wrote to memory of 3096	2908	PassatHook.exe	94
PID 2908 wrote to memory of 3096	2908	PassatHook.exe	94
PID 2908 wrote to memory of 5004	2908	PassatHook.exe	96
PID 2908 wrote to memory of 5004	2908	PassatHook.exe	96
PID 2908 wrote to memory of 2604	2908	PassatHook.exe	113
PID 2908 wrote to memory of 2604	2908	PassatHook.exe	113

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\PassatHook.exe
"C:\Users\Admin\AppData\Local\Temp\PassatHook.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2908
- 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\PassatHook.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1868
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'PassatHook.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3012
- 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\Perm.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1628
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Perm.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3096
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Perm" /tr "C:\Users\Admin\AppData\Roaming\Perm.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5004
- C:\Windows\SYSTEM32\shutdown.exe
  shutdown.exe /f /s /t 0
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2604

C:\Users\Admin\AppData\Roaming\Perm.exe
C:\Users\Admin\AppData\Roaming\Perm.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4908

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa38d6055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:432

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

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

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\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
588e5b3406537204588ef39f4c84259f

SHA1
c6056b8139c0796cc6272b7b71fca2085f62b785

SHA256
3b7e7c56deb0f16483d67e60a42a5f0a58ee557790fe0f312d036e4ecc31f7f0

SHA512
f85ea8f8f0c3ea56840a84f42a188f125c13cea8b23f86ddcce8eb28758e816dd6d871154dfe63d250ef369b153f72c587a7a8bccd0a2728b7bc922dd7436e96

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

Filesize
944B

MD5
75d224e238a397659d8e5cf458a41143

SHA1
d182d16283d3d864a2e328b677551428c29ad6df

SHA256
6a98fa5e6c5b77722f2bd8c855fd14d6bf545fc35b292252d1dc136b89ed2fee

SHA512
3477f3b4182ffdccc817de4242c8fcba706c193a0de5170cd023f8df3d330487d7e372556524b5a0fe1df56de40923700f3f8368eadf6601970e347cbcf078cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qo11dw1v.kkr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
81KB

MD5
6a94bba080aa0680e802f11fc15f3097

SHA1
5c02939054e727378cb0b53d33cf10fbce153ab8

SHA256
799e38a2d934e537b2f1caf0803549a16f436b36c75d370f82d8565fa707945a

SHA512
4de71ce1b3f3de66626a03f136f19f49bd9df9bafc1ded49e1df4c2ee4466e05e8e6c8de88ee45f36118d8d2f5c5194641ba4382fada02d34be2dccfe544c84e

Download Submit
memory/1868-18-0x00007FFC0F870000-0x00007FFC10331000-memory.dmp

Filesize
10.8MB

Download
memory/1868-15-0x000001CBB5690000-0x000001CBB56B2000-memory.dmp

Filesize
136KB

Download
memory/1868-5-0x00007FFC0F870000-0x00007FFC10331000-memory.dmp

Filesize
10.8MB

Download
memory/1868-4-0x00007FFC0F870000-0x00007FFC10331000-memory.dmp

Filesize
10.8MB

Download
memory/1868-3-0x00007FFC0F870000-0x00007FFC10331000-memory.dmp

Filesize
10.8MB

Download
memory/2908-0-0x00007FFC0F873000-0x00007FFC0F875000-memory.dmp

Filesize
8KB

Download
memory/2908-2-0x00007FFC0F870000-0x00007FFC10331000-memory.dmp

Filesize
10.8MB

Download
memory/2908-42-0x00007FFC0F873000-0x00007FFC0F875000-memory.dmp

Filesize
8KB

Download
memory/2908-58-0x00007FFC0F870000-0x00007FFC10331000-memory.dmp

Filesize
10.8MB

Download
memory/2908-59-0x000000001D030000-0x000000001D03C000-memory.dmp

Filesize
48KB

Download
memory/2908-1-0x0000000000170000-0x000000000018A000-memory.dmp

Filesize
104KB

Download
memory/2908-64-0x00007FFC0F870000-0x00007FFC10331000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads