xworm | f26dcdf460a3da96cedebca9baccca6947bea8f89e3a801118b9cd40da14bfa8

General

Target

Network.exe
Size

226KB
MD5

31c81fac210cd56abb84ff55ede0365b
SHA1

ca8a86da38e111f01ad04c9c537162be2af5f842
SHA256

f26dcdf460a3da96cedebca9baccca6947bea8f89e3a801118b9cd40da14bfa8
SHA512

11d21b79a689a3689470e975d25247639c9a0eba266f70c8d5168b94a06975dc98537206cf753f9a436ee679969a9820f6ffa63fb15852ca05cf0fdf8fdf6eba
SSDEEP

1536:vTtytp4hGT9/gEb8ATRf6VOSQmYqm3uzh+sh8tMI5loD+bhN/N5:vYQcKEb8bOSY3uz0sh8J5loDo/z

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

172.86.108.55:7771

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2544-1-0x0000000001270000-0x00000000012AE000-memory.dmp	family_xworm
behavioral1/files/0x0005000000004ed7-29.dat	family_xworm
behavioral1/memory/2984-35-0x00000000011D0000-0x000000000120E000-memory.dmp	family_xworm
behavioral1/memory/896-38-0x0000000001300000-0x000000000133E000-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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2820	powershell.exe
2748	powershell.exe
1564	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2984	Network.exe
896	Network.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\Network = "C:\\Users\\Admin\\AppData\\Roaming\\Network.exe"	Network.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
2100	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2820	powershell.exe
2748	powershell.exe
1564	powershell.exe
2544	Network.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2544	Network.exe
Token: SeDebugPrivilege	2820	powershell.exe
Token: SeDebugPrivilege	2748	powershell.exe
Token: SeDebugPrivilege	1564	powershell.exe
Token: SeDebugPrivilege	2544	Network.exe
Token: SeDebugPrivilege	2984	Network.exe
Token: SeDebugPrivilege	896	Network.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2544	Network.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 2820	2544	Network.exe	32
PID 2544 wrote to memory of 2820	2544	Network.exe	32
PID 2544 wrote to memory of 2820	2544	Network.exe	32
PID 2544 wrote to memory of 2748	2544	Network.exe	34
PID 2544 wrote to memory of 2748	2544	Network.exe	34
PID 2544 wrote to memory of 2748	2544	Network.exe	34
PID 2544 wrote to memory of 1564	2544	Network.exe	36
PID 2544 wrote to memory of 1564	2544	Network.exe	36
PID 2544 wrote to memory of 1564	2544	Network.exe	36
PID 2544 wrote to memory of 2100	2544	Network.exe	38
PID 2544 wrote to memory of 2100	2544	Network.exe	38
PID 2544 wrote to memory of 2100	2544	Network.exe	38
PID 1592 wrote to memory of 2984	1592	taskeng.exe	41
PID 1592 wrote to memory of 2984	1592	taskeng.exe	41
PID 1592 wrote to memory of 2984	1592	taskeng.exe	41
PID 1592 wrote to memory of 896	1592	taskeng.exe	42
PID 1592 wrote to memory of 896	1592	taskeng.exe	42
PID 1592 wrote to memory of 896	1592	taskeng.exe	42

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\Network.exe
"C:\Users\Admin\AppData\Local\Temp\Network.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:2544
- 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\Network.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2820
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Network.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2748
- 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\Network.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1564
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Network" /tr "C:\Users\Admin\AppData\Roaming\Network.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2100

C:\Windows\system32\taskeng.exe
taskeng.exe {07224019-B780-4363-9B24-60D2DDA80A3A} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1592
- C:\Users\Admin\AppData\Roaming\Network.exe
  C:\Users\Admin\AppData\Roaming\Network.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2984
- C:\Users\Admin\AppData\Roaming\Network.exe
  C:\Users\Admin\AppData\Roaming\Network.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:896

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\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
0a48a6168639b4a3bf49c2b0e299f0af

SHA1
eb9ebc3c3f22ef6f228b3881246a42514b67cc60

SHA256
6ff3ec27bcf8d14417ce348e814952ad7cf4635db02c6e8a1f537bf6892a938d

SHA512
44bb54de8bd71ba90e08d9abcf8a4ccfbcd84f128d48b521ac0c3d974cf59e29cce14ac32e2e2ab1b348b716be0458f1d7cea28380dfd6e8636769ef9b86a012

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

Filesize
226KB

MD5
31c81fac210cd56abb84ff55ede0365b

SHA1
ca8a86da38e111f01ad04c9c537162be2af5f842

SHA256
f26dcdf460a3da96cedebca9baccca6947bea8f89e3a801118b9cd40da14bfa8

SHA512
11d21b79a689a3689470e975d25247639c9a0eba266f70c8d5168b94a06975dc98537206cf753f9a436ee679969a9820f6ffa63fb15852ca05cf0fdf8fdf6eba

Download Submit
memory/896-38-0x0000000001300000-0x000000000133E000-memory.dmp

Filesize
248KB

Download
memory/2544-22-0x000007FEF5B63000-0x000007FEF5B64000-memory.dmp

Filesize
4KB

Download
memory/2544-0-0x000007FEF5B63000-0x000007FEF5B64000-memory.dmp

Filesize
4KB

Download
memory/2544-2-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2544-31-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2544-1-0x0000000001270000-0x00000000012AE000-memory.dmp

Filesize
248KB

Download
memory/2748-15-0x000000001B600000-0x000000001B8E2000-memory.dmp

Filesize
2.9MB

Download
memory/2748-16-0x0000000002670000-0x0000000002678000-memory.dmp

Filesize
32KB

Download
memory/2820-8-0x000000001B560000-0x000000001B842000-memory.dmp

Filesize
2.9MB

Download
memory/2820-9-0x0000000001FF0000-0x0000000001FF8000-memory.dmp

Filesize
32KB

Download
memory/2820-7-0x0000000002AA0000-0x0000000002B20000-memory.dmp

Filesize
512KB

Download
memory/2984-35-0x00000000011D0000-0x000000000120E000-memory.dmp

Filesize
248KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads