xworm | ad34f6a17ee318591b59ac4fbc300c53808630e4f163b644a58eadc85057348a

Reason

Machine shutdown

General

Target

NetCat Loader.exe
Size

76KB
MD5

1a56b39b62cff3bf7a75a708f6a11762
SHA1

180d91a57ebb95a81bfaa394bca35c123efa916e
SHA256

ad34f6a17ee318591b59ac4fbc300c53808630e4f163b644a58eadc85057348a
SHA512

b86dfa4287e283fd7e734cc3897589c2bb6b98e35f1c82a6ab50f271baf8a9748a125a6c04425ccdf93566ddacb453290a9a63e5fc0d2797b70fb70b6dac03fb
SSDEEP

1536:JqDtM7DwroXh9bSQ6/jyrV9nmRWnXzWb6Alyj:EwblSlryrV9nmwPeyj

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

194.59.31.87:1111

Attributes

install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023b0f-6.dat	family_xworm
behavioral2/memory/1096-15-0x00000000000F0000-0x0000000000106000-memory.dmp	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 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1940	powershell.exe
2972	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	NetCat Loader.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	System32.exe

Executes dropped EXE 1 IoCs

pid	Process
1096	System32.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
12	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
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\AccentColor = "4292311040"	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\EnableWindowColorization = "206"	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\StartColorMenu = "4288567808"	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\DWM\ColorizationGlassAttribute = "1"	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	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\ColorizationBlurBalance = "1"	LogonUI.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	NetCat Loader.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1096	System32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2972	powershell.exe
2972	powershell.exe
1940	powershell.exe
1940	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1096	System32.exe
Token: SeDebugPrivilege	2972	powershell.exe
Token: SeDebugPrivilege	1940	powershell.exe
Token: SeDebugPrivilege	1096	System32.exe
Token: SeShutdownPrivilege	3000	shutdown.exe
Token: SeRemoteShutdownPrivilege	3000	shutdown.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1204	LogonUI.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2336 wrote to memory of 1096	2336	NetCat Loader.exe	83
PID 2336 wrote to memory of 1096	2336	NetCat Loader.exe	83
PID 2336 wrote to memory of 2036	2336	NetCat Loader.exe	84
PID 2336 wrote to memory of 2036	2336	NetCat Loader.exe	84
PID 1096 wrote to memory of 2972	1096	System32.exe	88
PID 1096 wrote to memory of 2972	1096	System32.exe	88
PID 1096 wrote to memory of 1940	1096	System32.exe	90
PID 1096 wrote to memory of 1940	1096	System32.exe	90
PID 1096 wrote to memory of 3000	1096	System32.exe	106
PID 1096 wrote to memory of 3000	1096	System32.exe	106

C:\Users\Admin\AppData\Local\Temp\NetCat Loader.exe
"C:\Users\Admin\AppData\Local\Temp\NetCat Loader.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2336
- C:\Users\Admin\AppData\Roaming\System32.exe
  "C:\Users\Admin\AppData\Roaming\System32.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1096
- - 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\System32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2972
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1940
- - C:\Windows\SYSTEM32\shutdown.exe
    shutdown.exe /f /s /t 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3000
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Thanks For Using.txt
  2⤵
  PID:2036

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa38ca055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:1204

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

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
6c47b3f4e68eebd47e9332eebfd2dd4e

SHA1
67f0b143336d7db7b281ed3de5e877fa87261834

SHA256
8c48b1f2338e5b24094821f41121d2221f1cb3200338f46df49f64d1c4bc3e0c

SHA512
0acf302a9fc971ef9df65ed42c47ea17828e54dff685f4434f360556fd27cdc26a75069f00dcdc14ba174893c6fd7a2cfd8c6c07be3ce35dafee0a006914eaca

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gnhmalop.erz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\System32.exe

Filesize
63KB

MD5
66bbe5829a613fedad7f79e2c6273448

SHA1
57314396a65e08b7bfc5f0b8cdfa9a050579d9d9

SHA256
72499a032c26ef7031b942590e4dd2e28d60b332620c7d2dc42bc4b70995e0dd

SHA512
9b0ea0bb6a4a6ae75c6463f2bc3b5bd012a40a89f491868979230b850b948240b40326c703211edd349911e97a218bf77d01d06f254c33d83939c21a152efae3

Download Submit
C:\Users\Admin\AppData\Roaming\Thanks For Using.txt

Filesize
57B

MD5
f9cfd0c4da0a9a068f8a26ee31c85036

SHA1
ea75b71cfdf7364eacfafcaac0421f9c80a2b4e5

SHA256
e52f33ee65ceb7e5fe9cd47744888c089c37ba7dbadeaf345e75b5cadd43ee2d

SHA512
f81823ed92d8f5aa299d0164f59fb77a3af4c6a9ca5a98e0d4b33104ec7f15ef19037d4bb4f3b2c8c1ca156bac2253f5052eb801468db73d71a67b10405e4b51

Download Submit
memory/1096-19-0x00007FFAC9040000-0x00007FFAC9B01000-memory.dmp

Filesize
10.8MB

Download
memory/1096-18-0x00007FFAC9040000-0x00007FFAC9B01000-memory.dmp

Filesize
10.8MB

Download
memory/1096-15-0x00000000000F0000-0x0000000000106000-memory.dmp

Filesize
88KB

Download
memory/1096-45-0x00007FFAC9040000-0x00007FFAC9B01000-memory.dmp

Filesize
10.8MB

Download
memory/1096-46-0x000000001CEB0000-0x000000001CEBC000-memory.dmp

Filesize
48KB

Download
memory/1096-47-0x00007FFAC9040000-0x00007FFAC9B01000-memory.dmp

Filesize
10.8MB

Download
memory/2336-0-0x00007FFAC9043000-0x00007FFAC9045000-memory.dmp

Filesize
8KB

Download
memory/2336-1-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/2972-25-0x0000024EB49E0000-0x0000024EB4A02000-memory.dmp

Filesize
136KB

Download
memory/2972-32-0x0000024EB4B40000-0x0000024EB4D5C000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

Errors