xworm | 405bdae4a67cc4a4e5a9d2f39acd2ea34f5054f4caa8b085f03bb1286dfb5105

Analysis

max time kernel
51s
max time network
54s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20/06/2024, 09:10

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General

Target
XClient.exe
Size 61KB
Sample240620-k5dlastdpr
SHA256 405bdae4a67cc4a4e5a9d2f39acd2ea34f5054f4caa8b085f03bb1286dfb5105
MD5 60797170ebbe376274cf30e64b127706
SHA1 648e9c31b92f4d3fb93e7ca8be73836883c41538
SHA512 754d72a6b2a5428e64f0d8d58be0bd89a5f6a7c9ec646d08bccc981adf06567ab5191ba0a7768efe8ee8781bcd216e404a0ebaf55992a151e5536e26f8a93559
SSDEEP 1536:WzPVaddkiWRZrtTAdBxmiABbARE4TKQDmjav6/LnkO8AqYZP:Wz4CLTA9mi+bARsbLnkO8AxZP
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

127.0.0.1:32901
engineering-thoroughly.gl.at.ply.gg:32901

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3156-1-0x0000000000060000-0x0000000000076000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
2164	powershell.exe
4580	powershell.exe
3244	powershell.exe
1896	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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	XClient.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	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.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
3	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2164	powershell.exe
2164	powershell.exe
4580	powershell.exe
4580	powershell.exe
3244	powershell.exe
3244	powershell.exe
1896	powershell.exe
1896	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3156	XClient.exe
Token: SeDebugPrivilege	2164	powershell.exe
Token: SeDebugPrivilege	4580	powershell.exe
Token: SeDebugPrivilege	3244	powershell.exe
Token: SeDebugPrivilege	1896	powershell.exe
Token: SeDebugPrivilege	3156	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3156 wrote to memory of 2164	3156	XClient.exe	85
PID 3156 wrote to memory of 2164	3156	XClient.exe	85
PID 3156 wrote to memory of 4580	3156	XClient.exe	87
PID 3156 wrote to memory of 4580	3156	XClient.exe	87
PID 3156 wrote to memory of 3244	3156	XClient.exe	89
PID 3156 wrote to memory of 3244	3156	XClient.exe	89
PID 3156 wrote to memory of 1896	3156	XClient.exe	91
PID 3156 wrote to memory of 1896	3156	XClient.exe	91

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3156
- 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:2164
- 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:4580
- 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:3244
- 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:1896

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438
MD5 cadef9abd087803c630df65264a6c81c
SHA1 babbf3636c347c8727c35f3eef2ee643dbcc4bd2
SHA512 7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 0efa2469ae0b02af024fd0e2828ccab085eaefef3736b3bda0ba631e3a45aa48
MD5 bbc2b43d5e574fe7d193c6fc0eb7302c
SHA1 f22683b94ad593fd0513fef37df1fb5d0880cc22
SHA512 287449b168297a5176b26777f2f5ca3284d967b93274db8b3029d130049073560a10e418607f670d08194193aa91fc9cd174717e7c1d051b09c23857fe3ab9d2
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 b99f3c778a047e0348c92c16e0419fa29418d10d0fec61ad8283e92a094a2b32
MD5 aeceee3981c528bdc5e1c635b65d223d
SHA1 de9939ed37edca6772f5cdd29f6a973b36b7d31b
SHA512 df48285f38e9284efdbd9f8d99e2e94a46fb5465953421ab88497b73ae06895b98ea5c98796560810a6f342c31a9112ea87e03cd3e267fd8518d7585f492a8fb
MD5 SHA1 SHA512

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__PSScriptPolicyTest_pxez51bu.b3o.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pxez51bu.b3o.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/2164-3-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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memory/2164-5-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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memory/2164-11-0x0000016ACE310000-0x0000016ACE332000-memory.dmp

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memory/2164-18-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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memory/2164-4-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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memory/3156-0-0x00007FFE5BD23000-0x00007FFE5BD25000-memory.dmp

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memory/3156-2-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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memory/3156-1-0x0000000000060000-0x0000000000076000-memory.dmp

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memory/3156-57-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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