xworm | 9db86ea3a8d0b4aceea7d5b1dd99799253faf620667af16e1d97608ee07ef8d4

General

Target

XClient.exe
Size

63KB
MD5

5a5dbeea50546b1e505b3e8239f07b01
SHA1

0599b18235e0ad9b3e0ffa95a87f72790d969860
SHA256

9db86ea3a8d0b4aceea7d5b1dd99799253faf620667af16e1d97608ee07ef8d4
SHA512

571c940a4fee3b920891572d76fa9c181299d36f13bd532aa28ec5807584376d9be25fcf9290515494aeb79b4d907c062c39542799d6c33792d3b5d8e5711ba7
SSDEEP

1536:qPO0c8aM/vwspHf3UZbLGSIvmokYX6XU0OCrvxWa4BeO:qPOW/vtsZbLNSz8U0OCrvxYeO

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

3.0

C2

silver-bowl.gl.at.ply.gg:29206

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1780-1-0x00000000008A0000-0x00000000008B6000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4792	powershell.exe
3664	powershell.exe
4796	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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe
File opened for modification	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
2	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 7 IoCs

pid	Process
3664	powershell.exe
3664	powershell.exe
4796	powershell.exe
4796	powershell.exe
4792	powershell.exe
4792	powershell.exe
1780	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1780	XClient.exe
Token: SeDebugPrivilege	3664	powershell.exe
Token: SeDebugPrivilege	4796	powershell.exe
Token: SeDebugPrivilege	4792	powershell.exe
Token: SeDebugPrivilege	1780	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1780	XClient.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1780 wrote to memory of 3664	1780	XClient.exe	86
PID 1780 wrote to memory of 3664	1780	XClient.exe	86
PID 1780 wrote to memory of 4796	1780	XClient.exe	88
PID 1780 wrote to memory of 4796	1780	XClient.exe	88
PID 1780 wrote to memory of 4792	1780	XClient.exe	90
PID 1780 wrote to memory of 4792	1780	XClient.exe	90

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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1780
- 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:3664
- 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:4796
- 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:4792

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

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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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
944B

MD5
ce4540390cc4841c8973eb5a3e9f4f7d

SHA1
2293f30a6f4c9538bc5b06606c10a50ab4ecef8e

SHA256
e834e1da338b9644d538cefd70176768816da2556939c1255d386931bd085105

SHA512
2a3e466cb5a81d2b65256053b768a98321eb3e65ff46353eefc9864f14a391748116f050e7482ddd73a51575bf0a6fc5c673023dade62dbd8b174442bae1cc6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_r3focnrh.2dl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1780-0-0x00007FFDE63E3000-0x00007FFDE63E5000-memory.dmp

Filesize
8KB

Download
memory/1780-2-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

Filesize
10.8MB

Download
memory/1780-1-0x00000000008A0000-0x00000000008B6000-memory.dmp

Filesize
88KB

Download
memory/1780-46-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

Filesize
10.8MB

Download
memory/3664-13-0x00000206F8440000-0x00000206F8462000-memory.dmp

Filesize
136KB

Download
memory/3664-14-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

Filesize
10.8MB

Download
memory/3664-15-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

Filesize
10.8MB

Download
memory/3664-18-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

Filesize
10.8MB

Download
memory/3664-3-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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