xworm | 2126ac689af69c6853512e17814451b9cbb0662faf33eecbe339a5610bd86d65

General

Target

XClient.exe
Size

104KB
MD5

46ec3b97b9cb4d88170a96f131b77202
SHA1

40407b73e633f76467ec55faae4bc9c32aea6314
SHA256

2126ac689af69c6853512e17814451b9cbb0662faf33eecbe339a5610bd86d65
SHA512

790bc44f3588806e560c57870d59bd398b1cc2a9c96ad7f082187986b7dcbe5eef49087cfbef3e29f975faf76418326cbb6cbc20a8d5ad1b290eabd41abe4fa5
SSDEEP

3072:Jp2gE1/X4bK8FO/G/bY31mgjio+Saw9VElV:7g1P4bLbY31mgjilbyi

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

our-sole.gl.at.ply.gg:46907

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2000-1-0x0000000000D70000-0x0000000000D90000-memory.dmp	family_xworm
behavioral1/files/0x000d00000001472f-35.dat	family_xworm
behavioral1/memory/2344-37-0x0000000000E80000-0x0000000000EA0000-memory.dmp	family_xworm
behavioral1/memory/336-41-0x00000000002F0000-0x0000000000310000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	Process
2560	powershell.exe
2372	powershell.exe
2812	powershell.exe
2680	powershell.exe

Drops startup file 2 IoCs

Processes:

XClient.exe

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

Executes dropped EXE 3 IoCs

Processes:

XClient.exeXClient.exeXClient.exe

pid	Process
2344	XClient.exe
1924	XClient.exe
336	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

XClient.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.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.

Processes:

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

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

Processes:

schtasks.exe

pid	Process
2080	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid	Process
2560	powershell.exe
2372	powershell.exe
2812	powershell.exe
2680	powershell.exe
2000	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exeXClient.exeXClient.exeXClient.exe

description	pid	Process
Token: SeDebugPrivilege	2000	XClient.exe
Token: SeDebugPrivilege	2560	powershell.exe
Token: SeDebugPrivilege	2372	powershell.exe
Token: SeDebugPrivilege	2812	powershell.exe
Token: SeDebugPrivilege	2680	powershell.exe
Token: SeDebugPrivilege	2000	XClient.exe
Token: SeDebugPrivilege	2344	XClient.exe
Token: SeDebugPrivilege	1924	XClient.exe
Token: SeDebugPrivilege	336	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid	Process
2000	XClient.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

XClient.exetaskeng.exe

description	pid	Process	procid_target
PID 2000 wrote to memory of 2560	2000	XClient.exe	29
PID 2000 wrote to memory of 2560	2000	XClient.exe	29
PID 2000 wrote to memory of 2560	2000	XClient.exe	29
PID 2000 wrote to memory of 2372	2000	XClient.exe	31
PID 2000 wrote to memory of 2372	2000	XClient.exe	31
PID 2000 wrote to memory of 2372	2000	XClient.exe	31
PID 2000 wrote to memory of 2812	2000	XClient.exe	33
PID 2000 wrote to memory of 2812	2000	XClient.exe	33
PID 2000 wrote to memory of 2812	2000	XClient.exe	33
PID 2000 wrote to memory of 2680	2000	XClient.exe	35
PID 2000 wrote to memory of 2680	2000	XClient.exe	35
PID 2000 wrote to memory of 2680	2000	XClient.exe	35
PID 2000 wrote to memory of 2080	2000	XClient.exe	37
PID 2000 wrote to memory of 2080	2000	XClient.exe	37
PID 2000 wrote to memory of 2080	2000	XClient.exe	37
PID 780 wrote to memory of 2344	780	taskeng.exe	40
PID 780 wrote to memory of 2344	780	taskeng.exe	40
PID 780 wrote to memory of 2344	780	taskeng.exe	40
PID 780 wrote to memory of 1924	780	taskeng.exe	43
PID 780 wrote to memory of 1924	780	taskeng.exe	43
PID 780 wrote to memory of 1924	780	taskeng.exe	43
PID 780 wrote to memory of 336	780	taskeng.exe	44
PID 780 wrote to memory of 336	780	taskeng.exe	44
PID 780 wrote to memory of 336	780	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:2000
- 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:2560
- 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:2372
- 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:2812
- 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:2680
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2080

C:\Windows\system32\taskeng.exe
taskeng.exe {E549736C-DC92-425E-ADE7-1F6509C9DF6C} S-1-5-21-2721934792-624042501-2768869379-1000:BISMIZHX\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:780
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2344
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1924
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:336

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

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

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Downloads

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

Filesize
7KB

MD5
6f002a6e8a43ba5e1414f8bab2d8d6d4

SHA1
2c27a1b5c27e10dd615aeb3b9d020c33f2ef3507

SHA256
b6f71630f6c82bf20b73d2a875694aacd326c14a8eb3560560e35f7a59e42a89

SHA512
d852d465bbe6cc6e9a84081d99aee1c986952cad2acef41658f3b91b65dff82db53adf1ef67e80ad0e20dc2ff62bea1d85d469e56d96fdd0675444076f85c8d7

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
104KB

MD5
46ec3b97b9cb4d88170a96f131b77202

SHA1
40407b73e633f76467ec55faae4bc9c32aea6314

SHA256
2126ac689af69c6853512e17814451b9cbb0662faf33eecbe339a5610bd86d65

SHA512
790bc44f3588806e560c57870d59bd398b1cc2a9c96ad7f082187986b7dcbe5eef49087cfbef3e29f975faf76418326cbb6cbc20a8d5ad1b290eabd41abe4fa5

Download Submit
\??\PIPE\srvsvc

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
memory/336-41-0x00000000002F0000-0x0000000000310000-memory.dmp

Filesize
128KB

Download
memory/2000-2-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2000-0-0x000007FEF6083000-0x000007FEF6084000-memory.dmp

Filesize
4KB

Download
memory/2000-32-0x000007FEF6083000-0x000007FEF6084000-memory.dmp

Filesize
4KB

Download
memory/2000-33-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2000-1-0x0000000000D70000-0x0000000000D90000-memory.dmp

Filesize
128KB

Download
memory/2344-37-0x0000000000E80000-0x0000000000EA0000-memory.dmp

Filesize
128KB

Download
memory/2372-15-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2372-16-0x00000000023C0000-0x00000000023C8000-memory.dmp

Filesize
32KB

Download
memory/2560-7-0x0000000002A70000-0x0000000002AF0000-memory.dmp

Filesize
512KB

Download
memory/2560-8-0x000000001B4A0000-0x000000001B782000-memory.dmp

Filesize
2.9MB

Download
memory/2560-9-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads