xworm | b8318093edf9177163087e7eff4c7c8b7efa73f069a95c8e468ab30049beb36f

General

Target

ExcellentLoader.exe
Size

78KB
MD5

066dd41fdaee5a783bb23b84d5f5559e
SHA1

7b5ef0ad6d6a65184d300f616a1036c1476bc841
SHA256

b8318093edf9177163087e7eff4c7c8b7efa73f069a95c8e468ab30049beb36f
SHA512

956d42e02dcdb7dc68a7c1bf3ee921caf26adf8f52b9795f7b17f6dbbf7d63fcb2919c7d395e99d5e7344eb93e2103b45f672907e9abbeb69d198b8f8b60fa80
SSDEEP

1536:mmpxP0+g9rIcT4HF6vhjfIn8zG+bdbIXXF1HM66gJoOiJEJkZyglk:WI6tS8K+bdUzLyOYEewglk

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

all-advocacy.gl.at.ply.gg:33270

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/552-1-0x0000000000DC0000-0x0000000000DDA000-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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2936	powershell.exe
3896	powershell.exe
3236	powershell.exe
4960	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-1-5-21-925314154-1797147466-1467878628-1000\Control Panel\International\Geo\Nation	ExcellentLoader.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	ExcellentLoader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	ExcellentLoader.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-1-5-21-925314154-1797147466-1467878628-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	ExcellentLoader.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
3896	powershell.exe
3896	powershell.exe
3896	powershell.exe
3236	powershell.exe
3236	powershell.exe
3236	powershell.exe
4960	powershell.exe
4960	powershell.exe
4960	powershell.exe
2936	powershell.exe
2936	powershell.exe
2936	powershell.exe
552	ExcellentLoader.exe
552	ExcellentLoader.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	552	ExcellentLoader.exe
Token: SeDebugPrivilege	3896	powershell.exe
Token: SeDebugPrivilege	3236	powershell.exe
Token: SeDebugPrivilege	4960	powershell.exe
Token: SeDebugPrivilege	2936	powershell.exe
Token: SeDebugPrivilege	552	ExcellentLoader.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
552	ExcellentLoader.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 552 wrote to memory of 3896	552	ExcellentLoader.exe	93
PID 552 wrote to memory of 3896	552	ExcellentLoader.exe	93
PID 552 wrote to memory of 3236	552	ExcellentLoader.exe	95
PID 552 wrote to memory of 3236	552	ExcellentLoader.exe	95
PID 552 wrote to memory of 4960	552	ExcellentLoader.exe	97
PID 552 wrote to memory of 4960	552	ExcellentLoader.exe	97
PID 552 wrote to memory of 2936	552	ExcellentLoader.exe	99
PID 552 wrote to memory of 2936	552	ExcellentLoader.exe	99

C:\Users\Admin\AppData\Local\Temp\ExcellentLoader.exe
"C:\Users\Admin\AppData\Local\Temp\ExcellentLoader.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:552
- 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\ExcellentLoader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3896
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'ExcellentLoader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3236
- 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:4960
- 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:2936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

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\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
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
944B

MD5
9d20bed748fbb656980b0328d7b74728

SHA1
5fc8910c493356c0968a86452cb7952917b954b4

SHA256
172fe07653a93456e66d5b90333de53e23a561cf982a1a9d96c3459339009069

SHA512
eb1f0ca1042371a0d324ba520a9c4159fe91d34cf1851d829b1bf874b92f69fd08c540558d03f9a8c3286926c3c12d89ef9a70ac649c053a02f26922918054f1

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

Filesize
944B

MD5
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lewjt53u.05m.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/552-0-0x00007FFFC9613000-0x00007FFFC9615000-memory.dmp

Filesize
8KB

Download
memory/552-2-0x00007FFFC9613000-0x00007FFFC9615000-memory.dmp

Filesize
8KB

Download
memory/552-1-0x0000000000DC0000-0x0000000000DDA000-memory.dmp

Filesize
104KB

Download
memory/552-57-0x00007FFFC9610000-0x00007FFFCA0D1000-memory.dmp

Filesize
10.8MB

Download
memory/552-58-0x00007FFFC9610000-0x00007FFFCA0D1000-memory.dmp

Filesize
10.8MB

Download
memory/3896-13-0x00007FFFC9610000-0x00007FFFCA0D1000-memory.dmp

Filesize
10.8MB

Download
memory/3896-14-0x00007FFFC9610000-0x00007FFFCA0D1000-memory.dmp

Filesize
10.8MB

Download
memory/3896-15-0x00007FFFC9610000-0x00007FFFCA0D1000-memory.dmp

Filesize
10.8MB

Download
memory/3896-18-0x00007FFFC9610000-0x00007FFFCA0D1000-memory.dmp

Filesize
10.8MB

Download
memory/3896-12-0x00000286FF530000-0x00000286FF552000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads