xworm | a72f7b824c23a635a0abec3fd6b0572d04697fc8bf58bccfa5f963855d3e6402

General

Target

WindowsStartUp.exe
Size

76KB
MD5

ff496f039a1b48b510b12c97a959dd8d
SHA1

b7acb8a2525cf8ac34e1c8f60f8582ebbe740fd2
SHA256

a72f7b824c23a635a0abec3fd6b0572d04697fc8bf58bccfa5f963855d3e6402
SHA512

8f13c238915c9d3c93485b59a05cea7419ff48a9bcb37359e2b1a416b8ef9c4ba17e5a9ace8028640f2ebfededbb54170893f44701b2b61d91a3051f7557b416
SSDEEP

1536:VzucnLi2I9Uc8qJss2bWnShnNKZOcX+qBquq5U:1ucenUcnp2bQSdQZO09kU

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

true-foot.gl.at.ply.gg :7416

Attributes

Install_directory
%LocalAppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/1920-1-0x0000000000CA0000-0x0000000000CBA000-memory.dmp	family_xworm
behavioral1/files/0x000b000000012119-9.dat	family_xworm
behavioral1/memory/3000-16-0x0000000000C20000-0x0000000000C3A000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
3000	WindowsStartUp.exe
2844	WindowsStartUp.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-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsStartUp = "C:\\Users\\Admin\\AppData\\Local\\WindowsStartUp.exe"	WindowsStartUp.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
2	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
2924	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1920	WindowsStartUp.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1920	WindowsStartUp.exe
Token: SeDebugPrivilege	1920	WindowsStartUp.exe
Token: SeDebugPrivilege	3000	WindowsStartUp.exe
Token: SeDebugPrivilege	2844	WindowsStartUp.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1920	WindowsStartUp.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 2924	1920	WindowsStartUp.exe	31
PID 1920 wrote to memory of 2924	1920	WindowsStartUp.exe	31
PID 1920 wrote to memory of 2924	1920	WindowsStartUp.exe	31
PID 2012 wrote to memory of 3000	2012	taskeng.exe	34
PID 2012 wrote to memory of 3000	2012	taskeng.exe	34
PID 2012 wrote to memory of 3000	2012	taskeng.exe	34
PID 2012 wrote to memory of 2844	2012	taskeng.exe	35
PID 2012 wrote to memory of 2844	2012	taskeng.exe	35
PID 2012 wrote to memory of 2844	2012	taskeng.exe	35

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\WindowsStartUp.exe
"C:\Users\Admin\AppData\Local\Temp\WindowsStartUp.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:1920
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "WindowsStartUp" /tr "C:\Users\Admin\AppData\Local\WindowsStartUp.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2924

C:\Windows\system32\taskeng.exe
taskeng.exe {CA482BBF-FA8C-4A27-988A-3DDE7036D7EC} S-1-5-21-1506706701-1246725540-2219210854-1000:MUYDDIIS\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Users\Admin\AppData\Local\WindowsStartUp.exe
  C:\Users\Admin\AppData\Local\WindowsStartUp.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3000
- C:\Users\Admin\AppData\Local\WindowsStartUp.exe
  C:\Users\Admin\AppData\Local\WindowsStartUp.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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\Local\WindowsStartUp.exe

Filesize
76KB

MD5
ff496f039a1b48b510b12c97a959dd8d

SHA1
b7acb8a2525cf8ac34e1c8f60f8582ebbe740fd2

SHA256
a72f7b824c23a635a0abec3fd6b0572d04697fc8bf58bccfa5f963855d3e6402

SHA512
8f13c238915c9d3c93485b59a05cea7419ff48a9bcb37359e2b1a416b8ef9c4ba17e5a9ace8028640f2ebfededbb54170893f44701b2b61d91a3051f7557b416

Download Submit
memory/1920-0-0x000007FEF5BB3000-0x000007FEF5BB4000-memory.dmp

Filesize
4KB

Download
memory/1920-1-0x0000000000CA0000-0x0000000000CBA000-memory.dmp

Filesize
104KB

Download
memory/1920-2-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/1920-11-0x000007FEF5BB3000-0x000007FEF5BB4000-memory.dmp

Filesize
4KB

Download
memory/1920-12-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/3000-16-0x0000000000C20000-0x0000000000C3A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads