xworm | da84387864bbf2260524869ce8a0e3a4ecaa1944382f1f8cdc16b6d0e58a0d14

General

Target

XClient.exe
Size

41KB
MD5

db6c027e6b063181f9ed3bc3cb11c331
SHA1

4aa00a4187098f342d4803fcaad8eea697ee0809
SHA256

da84387864bbf2260524869ce8a0e3a4ecaa1944382f1f8cdc16b6d0e58a0d14
SHA512

6a48d214931e334b0e9c077a134a6ef51325c8fc759504ecd825aeb46a7d2160f28ecb6ac1c231354ebb3a6c25ab64418712110d478545fd11933531bfcdea07
SSDEEP

768:nG2ZOWZ42nxuT3XvgggCLJF5PG9pm+6vOwh+3EmzO:nG2bZ42n07XvvgcFI9A+6vOwA9K

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

welcome-soon.gl.at.ply.gg:12447

Mutex

90L0iLfiAde2P6nu

Attributes

Install_directory
%AppData%
install_file
$77MicrosoftDefender.exe

aes.plain

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2244-1-0x00000000008E0000-0x00000000008F0000-memory.dmp	family_xworm
behavioral1/files/0x0036000000015c8b-34.dat	family_xworm
behavioral1/memory/1692-36-0x0000000001320000-0x0000000001330000-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
2404	powershell.exe
1496	powershell.exe
2864	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
1692	$77MicrosoftDefender.exe
1440	$77MicrosoftDefender.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-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\$77MicrosoftDefender = "C:\\Users\\Admin\\AppData\\Roaming\\$77MicrosoftDefender.exe"	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
4	ip-api.com

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2356	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2936	powershell.exe
2404	powershell.exe
1496	powershell.exe
2864	powershell.exe
2244	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2244	XClient.exe
Token: SeDebugPrivilege	2936	powershell.exe
Token: SeDebugPrivilege	2404	powershell.exe
Token: SeDebugPrivilege	1496	powershell.exe
Token: SeDebugPrivilege	2864	powershell.exe
Token: SeDebugPrivilege	2244	XClient.exe
Token: SeDebugPrivilege	1692	$77MicrosoftDefender.exe
Token: SeDebugPrivilege	1440	$77MicrosoftDefender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2244	XClient.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 2936	2244	XClient.exe	31
PID 2244 wrote to memory of 2936	2244	XClient.exe	31
PID 2244 wrote to memory of 2936	2244	XClient.exe	31
PID 2244 wrote to memory of 2404	2244	XClient.exe	33
PID 2244 wrote to memory of 2404	2244	XClient.exe	33
PID 2244 wrote to memory of 2404	2244	XClient.exe	33
PID 2244 wrote to memory of 1496	2244	XClient.exe	35
PID 2244 wrote to memory of 1496	2244	XClient.exe	35
PID 2244 wrote to memory of 1496	2244	XClient.exe	35
PID 2244 wrote to memory of 2864	2244	XClient.exe	37
PID 2244 wrote to memory of 2864	2244	XClient.exe	37
PID 2244 wrote to memory of 2864	2244	XClient.exe	37
PID 2244 wrote to memory of 2356	2244	XClient.exe	39
PID 2244 wrote to memory of 2356	2244	XClient.exe	39
PID 2244 wrote to memory of 2356	2244	XClient.exe	39
PID 316 wrote to memory of 1692	316	taskeng.exe	43
PID 316 wrote to memory of 1692	316	taskeng.exe	43
PID 316 wrote to memory of 1692	316	taskeng.exe	43
PID 316 wrote to memory of 1440	316	taskeng.exe	44
PID 316 wrote to memory of 1440	316	taskeng.exe	44
PID 316 wrote to memory of 1440	316	taskeng.exe	44

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- 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:2244
- 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:2936
- 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:2404
- 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\$77MicrosoftDefender.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1496
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$77MicrosoftDefender.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2864
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77MicrosoftDefender" /tr "C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2356

C:\Windows\system32\taskeng.exe
taskeng.exe {1EA74921-C139-4E42-A6B4-3092F9561DF0} S-1-5-21-1163522206-1469769407-485553996-1000:PJCSDMRP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:316
- C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
  C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1692
- C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
  C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1440

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe

Filesize
41KB

MD5
db6c027e6b063181f9ed3bc3cb11c331

SHA1
4aa00a4187098f342d4803fcaad8eea697ee0809

SHA256
da84387864bbf2260524869ce8a0e3a4ecaa1944382f1f8cdc16b6d0e58a0d14

SHA512
6a48d214931e334b0e9c077a134a6ef51325c8fc759504ecd825aeb46a7d2160f28ecb6ac1c231354ebb3a6c25ab64418712110d478545fd11933531bfcdea07

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
d356454185834ecf3b5e369965bdc471

SHA1
0874a5886e1b5a7226a023bd8f41cd8565037d1a

SHA256
135a0227d8040268f1a18a1a89398aa66190332c36065ae0b16cb45f12ef1745

SHA512
87a24b46b3985f1c0d0171538f8cf20ec597e32d7dfcbfb67e612035c6857444d4279fa35f04885b9cc20c42cb8d36d2c95e2f5015b6c9989f41567d8c581184

Download Submit
memory/1692-36-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/2244-22-0x000007FEF5003000-0x000007FEF5004000-memory.dmp

Filesize
4KB

Download
memory/2244-0-0x000007FEF5003000-0x000007FEF5004000-memory.dmp

Filesize
4KB

Download
memory/2244-32-0x000007FEF5000000-0x000007FEF59EC000-memory.dmp

Filesize
9.9MB

Download
memory/2244-2-0x000007FEF5000000-0x000007FEF59EC000-memory.dmp

Filesize
9.9MB

Download
memory/2244-1-0x00000000008E0000-0x00000000008F0000-memory.dmp

Filesize
64KB

Download
memory/2404-15-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/2404-16-0x0000000002690000-0x0000000002698000-memory.dmp

Filesize
32KB

Download
memory/2936-8-0x000000001B560000-0x000000001B842000-memory.dmp

Filesize
2.9MB

Download
memory/2936-9-0x00000000029E0000-0x00000000029E8000-memory.dmp

Filesize
32KB

Download
memory/2936-7-0x0000000002A00000-0x0000000002A80000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads