xworm | 685247d0074365beb7fdd3942878bdf2fce06e7b1049f5cc803a50fa4e757d91

General

Target

Null menu.exe
Size

484KB
MD5

cc5fdd81e44d6b85b629544133820a27
SHA1

d5e8421ac31abddd23f2b00841d2ed5f671d2670
SHA256

685247d0074365beb7fdd3942878bdf2fce06e7b1049f5cc803a50fa4e757d91
SHA512

398b99025320847042717fcfb5a6f9b15f95583a7304f4e8315c1746c58ed46083cf133d9893ee6d187068a4c98216c15af6d010ec84119bc3fb9e8bcabde9e4
SSDEEP

1536:GUU/LRr4lW/f4RQYvX3yb+bWwpfkABQBf6kOJZYJ/Hi6pkRpuuoRzakOJ+ON8xqE:GT+8XCnXCb+bWwANOJCJWkH/G4Z

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

193.161.193.99:26331

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2708-1-0x0000000000860000-0x00000000008DE000-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

pid	Process
1100	powershell.exe
2240	powershell.exe
2628	powershell.exe
2648	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System User.lnk	Null menu.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System User.lnk	Null menu.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-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\System User = "C:\\Users\\Admin\\AppData\\Roaming\\System User"	Null menu.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
2220	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2240	powershell.exe
2628	powershell.exe
2648	powershell.exe
1100	powershell.exe
2708	Null menu.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2708	Null menu.exe
Token: SeDebugPrivilege	2240	powershell.exe
Token: SeDebugPrivilege	2628	powershell.exe
Token: SeDebugPrivilege	2648	powershell.exe
Token: SeDebugPrivilege	1100	powershell.exe
Token: SeDebugPrivilege	2708	Null menu.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2708	Null menu.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2708 wrote to memory of 2240	2708	Null menu.exe	30
PID 2708 wrote to memory of 2240	2708	Null menu.exe	30
PID 2708 wrote to memory of 2240	2708	Null menu.exe	30
PID 2708 wrote to memory of 2628	2708	Null menu.exe	32
PID 2708 wrote to memory of 2628	2708	Null menu.exe	32
PID 2708 wrote to memory of 2628	2708	Null menu.exe	32
PID 2708 wrote to memory of 2648	2708	Null menu.exe	34
PID 2708 wrote to memory of 2648	2708	Null menu.exe	34
PID 2708 wrote to memory of 2648	2708	Null menu.exe	34
PID 2708 wrote to memory of 1100	2708	Null menu.exe	36
PID 2708 wrote to memory of 1100	2708	Null menu.exe	36
PID 2708 wrote to memory of 1100	2708	Null menu.exe	36
PID 2708 wrote to memory of 2220	2708	Null menu.exe	38
PID 2708 wrote to memory of 2220	2708	Null menu.exe	38
PID 2708 wrote to memory of 2220	2708	Null menu.exe	38

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\Null menu.exe
"C:\Users\Admin\AppData\Local\Temp\Null menu.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:2708
- 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\Null menu.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2240
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Null menu.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2628
- 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\System User'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2648
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System User'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1100
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System User" /tr "C:\Users\Admin\AppData\Roaming\System User"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2220

C:\Windows\system32\taskeng.exe
taskeng.exe {4921E173-B696-4894-BA3C-2DC8A2BAD31D} S-1-5-21-3434294380-2554721341-1919518612-1000:ELZYPTFV\Admin:Interactive:[1]
1⤵
PID:2780

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\Microsoft\Windows\Recent\CustomDestinations\8J9MMWIG75M8WB0JINDE.temp

Filesize
7KB

MD5
3d6a193c029b2fe9c563bf7ac4a26d06

SHA1
92327a35a731b781c75d35e6183b3ef45d45c1e4

SHA256
979995db6e473f1c0ff1aeea480d528c3759b213e186a619aac4fac87da9bf03

SHA512
5b7c21afcbc1d1cf3d01875c7cccd515358fc29224a440b04161f5aaf003406a70d5737f63c13f26d68ad2f581520adc119384d25801efbb1037eeb67239bdc1

Download Submit
memory/2240-6-0x0000000002C80000-0x0000000002D00000-memory.dmp

Filesize
512KB

Download
memory/2240-7-0x000000001B4F0000-0x000000001B7D2000-memory.dmp

Filesize
2.9MB

Download
memory/2240-8-0x0000000002A60000-0x0000000002A68000-memory.dmp

Filesize
32KB

Download
memory/2628-15-0x00000000023C0000-0x00000000023C8000-memory.dmp

Filesize
32KB

Download
memory/2628-14-0x000000001B5C0000-0x000000001B8A2000-memory.dmp

Filesize
2.9MB

Download
memory/2708-0-0x000007FEF53D3000-0x000007FEF53D4000-memory.dmp

Filesize
4KB

Download
memory/2708-1-0x0000000000860000-0x00000000008DE000-memory.dmp

Filesize
504KB

Download
memory/2708-30-0x000000001B080000-0x000000001B100000-memory.dmp

Filesize
512KB

Download
memory/2708-31-0x000007FEF53D3000-0x000007FEF53D4000-memory.dmp

Filesize
4KB

Download
memory/2708-32-0x000000001B080000-0x000000001B100000-memory.dmp

Filesize
512KB

Download
memory/2708-33-0x000000001A620000-0x000000001A62C000-memory.dmp

Filesize
48KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads