xworm | c4ea12a0cc4f111e1ee0d80c9c6c2797fdf293ba60e903d49d3b5066686c9fdf

General

Target

XClient.exe
Size

233KB
MD5

c5e1bae4b6509ae7e27db03a2d1ee31c
SHA1

a927ff54a81d6ecc6771bf7b024c6f3ede48ca1d
SHA256

c4ea12a0cc4f111e1ee0d80c9c6c2797fdf293ba60e903d49d3b5066686c9fdf
SHA512

a4d6b2ac5db471857d6c192e88980f569718e4b10ada9f18f1b7c4efc7c042f72c62b75c7e4ab1b9b7abe312162cfb13eb7f21a141082b93772e6e2065bb619a
SSDEEP

3072:WabIfVI0uYje+bU3ZFLORanu8SKfbzxcwg7es6/Vsb8VKTu549oJMfF/H9N3Ky91:WjV8ObanuUhcX7elbKTua9bfF/H9d9n

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

est-review.gl.at.ply.gg:23712

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2776-1-0x00000000002D0000-0x0000000000310000-memory.dmp	family_xworm
behavioral1/files/0x002e000000015e5b-10.dat	family_xworm
behavioral1/memory/2940-12-0x0000000000B40000-0x0000000000B80000-memory.dmp	family_xworm
behavioral1/memory/1748-15-0x00000000003E0000-0x0000000000420000-memory.dmp	family_xworm
behavioral1/memory/2276-17-0x0000000000250000-0x0000000000290000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2940	XClient.exe
1748	XClient.exe
2276	XClient.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	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
2788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2776	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2776	XClient.exe
Token: SeDebugPrivilege	2776	XClient.exe
Token: SeDebugPrivilege	2940	XClient.exe
Token: SeDebugPrivilege	1748	XClient.exe
Token: SeDebugPrivilege	2276	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2776	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2776 wrote to memory of 2788	2776	XClient.exe	30
PID 2776 wrote to memory of 2788	2776	XClient.exe	30
PID 2776 wrote to memory of 2788	2776	XClient.exe	30
PID 2580 wrote to memory of 2940	2580	taskeng.exe	34
PID 2580 wrote to memory of 2940	2580	taskeng.exe	34
PID 2580 wrote to memory of 2940	2580	taskeng.exe	34
PID 2580 wrote to memory of 1748	2580	taskeng.exe	35
PID 2580 wrote to memory of 1748	2580	taskeng.exe	35
PID 2580 wrote to memory of 1748	2580	taskeng.exe	35
PID 2580 wrote to memory of 2276	2580	taskeng.exe	36
PID 2580 wrote to memory of 2276	2580	taskeng.exe	36
PID 2580 wrote to memory of 2276	2580	taskeng.exe	36

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: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2776
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2788

C:\Windows\system32\taskeng.exe
taskeng.exe {1B65E4A7-AB26-48A9-8729-90755F7036D8} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2580
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2940
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1748
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2276

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
233KB

MD5
c5e1bae4b6509ae7e27db03a2d1ee31c

SHA1
a927ff54a81d6ecc6771bf7b024c6f3ede48ca1d

SHA256
c4ea12a0cc4f111e1ee0d80c9c6c2797fdf293ba60e903d49d3b5066686c9fdf

SHA512
a4d6b2ac5db471857d6c192e88980f569718e4b10ada9f18f1b7c4efc7c042f72c62b75c7e4ab1b9b7abe312162cfb13eb7f21a141082b93772e6e2065bb619a

Download Submit
memory/1748-15-0x00000000003E0000-0x0000000000420000-memory.dmp

Filesize
256KB

Download
memory/2276-17-0x0000000000250000-0x0000000000290000-memory.dmp

Filesize
256KB

Download
memory/2776-0-0x000007FEF6503000-0x000007FEF6504000-memory.dmp

Filesize
4KB

Download
memory/2776-1-0x00000000002D0000-0x0000000000310000-memory.dmp

Filesize
256KB

Download
memory/2776-6-0x000007FEF6500000-0x000007FEF6EEC000-memory.dmp

Filesize
9.9MB

Download
memory/2776-7-0x000007FEF6503000-0x000007FEF6504000-memory.dmp

Filesize
4KB

Download
memory/2776-8-0x000007FEF6500000-0x000007FEF6EEC000-memory.dmp

Filesize
9.9MB

Download
memory/2940-12-0x0000000000B40000-0x0000000000B80000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads