xworm | cd9850775a2bcc775a334e3893f9e5f994fdbd35d8d3715afebec5cd0415c74c

General

Target

XClient.exe
Size

76KB
MD5

20e1e5e3bbf0a01a30941cc12733c2da
SHA1

fced9d178bb03d5ed6bc2b0dc57befd9baed0e08
SHA256

cd9850775a2bcc775a334e3893f9e5f994fdbd35d8d3715afebec5cd0415c74c
SHA512

3642ca896b7fa00baf455d0764326ca6b8dab6d66bc743af8903c3937acfee7462b7964f98d340285edf3810c1f982a36f4911d7c74ab4ed8d5e8f4612feda12
SSDEEP

1536:5nstrkdd0P9rvnau2jsw84fP+uNu9b1KES9o//6U5VOHUQu5n+x:Kto+rCd2l9b1Kty5XOHU5+x

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

193.161.193.99:1194

Attributes

Install_directory
%AppData%
install_file
USB.exe
telegram
https://api.telegram.org/bot7704029346:AAHPre1lXQa0UfPCpOUXJZ9UXA9mFxvH4Gk/sendMessage?chat_id=7590668020

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2380-1-0x0000000001000000-0x000000000101A000-memory.dmp	family_xworm
behavioral1/files/0x000b0000000120f9-33.dat	family_xworm
behavioral1/memory/1088-35-0x0000000000EF0000-0x0000000000F0A000-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
2164	powershell.exe
2760	powershell.exe
2924	powershell.exe
2764	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\security.lnk	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\security.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
1088	security
2948	security

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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\security = "C:\\Users\\Admin\\AppData\\Roaming\\security"	XClient.exe

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
2592	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2380	XClient.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2164	powershell.exe
2760	powershell.exe
2924	powershell.exe
2764	powershell.exe
2380	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2380	XClient.exe
Token: SeDebugPrivilege	2164	powershell.exe
Token: SeDebugPrivilege	2760	powershell.exe
Token: SeDebugPrivilege	2924	powershell.exe
Token: SeDebugPrivilege	2764	powershell.exe
Token: SeDebugPrivilege	2380	XClient.exe
Token: SeDebugPrivilege	1088	security
Token: SeDebugPrivilege	2948	security

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2380	XClient.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2164	2380	XClient.exe	30
PID 2380 wrote to memory of 2164	2380	XClient.exe	30
PID 2380 wrote to memory of 2164	2380	XClient.exe	30
PID 2380 wrote to memory of 2760	2380	XClient.exe	32
PID 2380 wrote to memory of 2760	2380	XClient.exe	32
PID 2380 wrote to memory of 2760	2380	XClient.exe	32
PID 2380 wrote to memory of 2924	2380	XClient.exe	34
PID 2380 wrote to memory of 2924	2380	XClient.exe	34
PID 2380 wrote to memory of 2924	2380	XClient.exe	34
PID 2380 wrote to memory of 2764	2380	XClient.exe	36
PID 2380 wrote to memory of 2764	2380	XClient.exe	36
PID 2380 wrote to memory of 2764	2380	XClient.exe	36
PID 2380 wrote to memory of 2592	2380	XClient.exe	38
PID 2380 wrote to memory of 2592	2380	XClient.exe	38
PID 2380 wrote to memory of 2592	2380	XClient.exe	38
PID 2088 wrote to memory of 1088	2088	taskeng.exe	43
PID 2088 wrote to memory of 1088	2088	taskeng.exe	43
PID 2088 wrote to memory of 1088	2088	taskeng.exe	43
PID 2088 wrote to memory of 2948	2088	taskeng.exe	44
PID 2088 wrote to memory of 2948	2088	taskeng.exe	44
PID 2088 wrote to memory of 2948	2088	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: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2380
- 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:2760
- 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\security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2924
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2764
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "security" /tr "C:\Users\Admin\AppData\Roaming\security"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2592

C:\Windows\system32\taskeng.exe
taskeng.exe {1481D5C4-56D2-4A79-99DA-82A0B1778548} S-1-5-21-3063565911-2056067323-3330884624-1000:KHBTHJFA\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1088
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2948

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

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\TUP8984N3ADG4LV8EZNY.temp

Filesize
7KB

MD5
8700105a2996dc1927b61c3fe8291198

SHA1
abe843e6f14c119a8ee1f0911fd1e138e110a570

SHA256
7f65b4361ce8835465b3092f48d7562ab089bbd2837e3cb517100497e1c22f74

SHA512
429e560b5def9e03e2913a6b07d8bb42c1403881571b7d56a0f5a9958931a3d9e6435366a2db56194cfed7021185aecc89e7897a53dc9e9b269f5a67631d34af

Download Submit
C:\Users\Admin\AppData\Roaming\security

Filesize
76KB

MD5
20e1e5e3bbf0a01a30941cc12733c2da

SHA1
fced9d178bb03d5ed6bc2b0dc57befd9baed0e08

SHA256
cd9850775a2bcc775a334e3893f9e5f994fdbd35d8d3715afebec5cd0415c74c

SHA512
3642ca896b7fa00baf455d0764326ca6b8dab6d66bc743af8903c3937acfee7462b7964f98d340285edf3810c1f982a36f4911d7c74ab4ed8d5e8f4612feda12

Download Submit
memory/1088-35-0x0000000000EF0000-0x0000000000F0A000-memory.dmp

Filesize
104KB

Download
memory/2164-6-0x0000000002CB0000-0x0000000002D30000-memory.dmp

Filesize
512KB

Download
memory/2164-7-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2164-8-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2380-30-0x000000001B1B0000-0x000000001B230000-memory.dmp

Filesize
512KB

Download
memory/2380-0-0x000007FEF58F3000-0x000007FEF58F4000-memory.dmp

Filesize
4KB

Download
memory/2380-31-0x000000001B1B0000-0x000000001B230000-memory.dmp

Filesize
512KB

Download
memory/2380-1-0x0000000001000000-0x000000000101A000-memory.dmp

Filesize
104KB

Download
memory/2760-15-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download
memory/2760-14-0x000000001B780000-0x000000001BA62000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads