xworm | dbe5501ab97362e220ae913a75b6f251a1d890971cf2a962b0f7248ec7808daf

General

Target

ExcellentSkin.exe
Size

65KB
MD5

cd3ab4a2a69f0dbb8082710cd27734b4
SHA1

a8c759c3e080738081272896e0f263f9e39de98b
SHA256

dbe5501ab97362e220ae913a75b6f251a1d890971cf2a962b0f7248ec7808daf
SHA512

c7fdba39ba403b53fc4baaeab276a89eccddc7477b2c057f17f943be135da59bc70e1b4574bc1d22290a27497051a56bee177e58178aa1b176813e50688215ca
SSDEEP

1536:yLtIgPGIjoghF5YX5JCFU+b7wnzMSIM4Y6lPUhWUONrogIk0Zk:YIgSgh3I5JCG+b7A8UOtJ0Zk

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/3860-1-0x0000000000060000-0x0000000000076000-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
3156	powershell.exe
4344	powershell.exe
4216	powershell.exe
1744	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-1-5-21-100612193-3312047696-905266872-1000\Control Panel\International\Geo\Nation	ExcellentSkin.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	ExcellentSkin.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	ExcellentSkin.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-1-5-21-100612193-3312047696-905266872-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	ExcellentSkin.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3156	powershell.exe
3156	powershell.exe
4344	powershell.exe
4344	powershell.exe
4216	powershell.exe
4216	powershell.exe
1744	powershell.exe
1744	powershell.exe
3860	ExcellentSkin.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3860	ExcellentSkin.exe
Token: SeDebugPrivilege	3156	powershell.exe
Token: SeDebugPrivilege	4344	powershell.exe
Token: SeDebugPrivilege	4216	powershell.exe
Token: SeDebugPrivilege	1744	powershell.exe
Token: SeDebugPrivilege	3860	ExcellentSkin.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3860	ExcellentSkin.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3860 wrote to memory of 3156	3860	ExcellentSkin.exe	94
PID 3860 wrote to memory of 3156	3860	ExcellentSkin.exe	94
PID 3860 wrote to memory of 4344	3860	ExcellentSkin.exe	98
PID 3860 wrote to memory of 4344	3860	ExcellentSkin.exe	98
PID 3860 wrote to memory of 4216	3860	ExcellentSkin.exe	100
PID 3860 wrote to memory of 4216	3860	ExcellentSkin.exe	100
PID 3860 wrote to memory of 1744	3860	ExcellentSkin.exe	102
PID 3860 wrote to memory of 1744	3860	ExcellentSkin.exe	102

C:\Users\Admin\AppData\Local\Temp\ExcellentSkin.exe
"C:\Users\Admin\AppData\Local\Temp\ExcellentSkin.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:3860
- 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\ExcellentSkin.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3156
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'ExcellentSkin.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4344
- 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:4216
- 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:1744

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
a7cc007980e419d553568a106210549a

SHA1
c03099706b75071f36c3962fcc60a22f197711e0

SHA256
a5735921fc72189c8bf577f3911486cf031708dc8d6bc764fe3e593c0a053165

SHA512
b9aaf29403c467daef80a1ae87478afc33b78f4e1ca16189557011bb83cf9b3e29a0f85c69fa209c45201fb28baca47d31756eee07b79c6312c506e8370f7666

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

Filesize
944B

MD5
65a68df1062af34622552c4f644a5708

SHA1
6f6ecf7b4b635abb0b132d95dac2759dc14b50af

SHA256
718dc2f5f4a6dbb7fab7f3db05bd7f602fb16526caae7084ab46c3ab4e7bad35

SHA512
4e460eb566032942547b58411222dd26ae300a95f83cf5ae6df58ebd28594341123611b348bd4031a33bc7f38307d5cb8fb677bba8c896919e3eee677a104d4d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_srlqgmuj.mcy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3156-3-0x000001B10CEB0000-0x000001B10CED2000-memory.dmp

Filesize
136KB

Download
memory/3156-14-0x00007FFCBD540000-0x00007FFCBE001000-memory.dmp

Filesize
10.8MB

Download
memory/3156-15-0x00007FFCBD540000-0x00007FFCBE001000-memory.dmp

Filesize
10.8MB

Download
memory/3156-18-0x00007FFCBD540000-0x00007FFCBE001000-memory.dmp

Filesize
10.8MB

Download
memory/3156-13-0x00007FFCBD540000-0x00007FFCBE001000-memory.dmp

Filesize
10.8MB

Download
memory/3860-0-0x00007FFCBD543000-0x00007FFCBD545000-memory.dmp

Filesize
8KB

Download
memory/3860-2-0x00007FFCBD543000-0x00007FFCBD545000-memory.dmp

Filesize
8KB

Download
memory/3860-1-0x0000000000060000-0x0000000000076000-memory.dmp

Filesize
88KB

Download
memory/3860-57-0x00007FFCBD540000-0x00007FFCBE001000-memory.dmp

Filesize
10.8MB

Download
memory/3860-58-0x00007FFCBD540000-0x00007FFCBE001000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads