xworm | 26eb0d93904680fef2d4df49b9d55a6e54f8b341a888bb6bec2fec1e711e9536

General

Target

injector.exe
Size

36KB
MD5

1d9727f02bd353afc1fedee98e4acfbb
SHA1

2263f809ead639430a130976ea4722aacb3e1362
SHA256

26eb0d93904680fef2d4df49b9d55a6e54f8b341a888bb6bec2fec1e711e9536
SHA512

62390fc747f737a15879a521f68827ab73dd26e1ee08837f3eaad542dc435703f98552b187aa19c760dc3a12c1a4d183c4d5450e4458c1a1111f131fd3de97cc
SSDEEP

768:F2C78uvbhLyScu6JBbTZ6VFyc9PZO/h7AX:Ft78utLySuJBbTZwF39PZO/KX

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

six-usb.gl.at.ply.gg:49722

Mutex

TcBEJUp0a8DkShx2

Attributes

Install_directory
%AppData%
install_file
System User.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2124-1-0x00000000001B0000-0x00000000001C0000-memory.dmp	family_xworm
behavioral2/files/0x000d000000023b69-9.dat	family_xworm

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	injector.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2768	System User.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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System User = "C:\\Users\\Admin\\AppData\\Roaming\\System User.exe"	injector.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2652	timeout.exe

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
4944	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2124	injector.exe
Token: SeDebugPrivilege	2124	injector.exe
Token: SeDebugPrivilege	2768	System User.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2124 wrote to memory of 4944	2124	injector.exe	90
PID 2124 wrote to memory of 4944	2124	injector.exe	90
PID 2124 wrote to memory of 4824	2124	injector.exe	96
PID 2124 wrote to memory of 4824	2124	injector.exe	96
PID 2124 wrote to memory of 4700	2124	injector.exe	98
PID 2124 wrote to memory of 4700	2124	injector.exe	98
PID 4700 wrote to memory of 2652	4700	cmd.exe	100
PID 4700 wrote to memory of 2652	4700	cmd.exe	100

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\injector.exe
"C:\Users\Admin\AppData\Local\Temp\injector.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2124
- 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.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4944
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "System User"
  2⤵
  PID:4824
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF7C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4700
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2652

C:\Users\Admin\AppData\Roaming\System User.exe
"C:\Users\Admin\AppData\Roaming\System User.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2768

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpF7C.tmp.bat

Filesize
159B

MD5
d49d0acf5f3ace8adf04a787b64853c2

SHA1
2cdd36cf913cb24f2adb5d214ea12f36d092984e

SHA256
1fcc7b0befa34515c4fed75a9d7b44c145bfe0a940db15749b684b5bf5fc0439

SHA512
3cbbf8ac7476e67066647b434807f0a8b588b153b03bf2d0714849f1b2c828db83df845f4d35d27e001acc86b419eb8b424de3781d53a1ca3143e962237b58de

Download Submit
C:\Users\Admin\AppData\Roaming\System User.exe

Filesize
36KB

MD5
1d9727f02bd353afc1fedee98e4acfbb

SHA1
2263f809ead639430a130976ea4722aacb3e1362

SHA256
26eb0d93904680fef2d4df49b9d55a6e54f8b341a888bb6bec2fec1e711e9536

SHA512
62390fc747f737a15879a521f68827ab73dd26e1ee08837f3eaad542dc435703f98552b187aa19c760dc3a12c1a4d183c4d5450e4458c1a1111f131fd3de97cc

Download Submit
memory/2124-0-0x00007FFC76C43000-0x00007FFC76C45000-memory.dmp

Filesize
8KB

Download
memory/2124-1-0x00000000001B0000-0x00000000001C0000-memory.dmp

Filesize
64KB

Download
memory/2124-6-0x00007FFC76C40000-0x00007FFC77701000-memory.dmp

Filesize
10.8MB

Download
memory/2124-7-0x00007FFC76C43000-0x00007FFC76C45000-memory.dmp

Filesize
8KB

Download
memory/2124-8-0x00007FFC76C40000-0x00007FFC77701000-memory.dmp

Filesize
10.8MB

Download
memory/2124-20-0x00007FFC76C40000-0x00007FFC77701000-memory.dmp

Filesize
10.8MB

Download
memory/2768-11-0x00007FFC76C40000-0x00007FFC77701000-memory.dmp

Filesize
10.8MB

Download
memory/2768-13-0x00007FFC76C40000-0x00007FFC77701000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads