xworm | 34eb863221fc8e6894769217eed29c928c98abfff3f7e37901b4fff968f28b7e

General

Target

XClient.exe
Size

76KB
MD5

b027cd851c4ab83c66c1c8516567e537
SHA1

c0afcc7cca0af22fd7b179d8366c1ab7b4d1804f
SHA256

34eb863221fc8e6894769217eed29c928c98abfff3f7e37901b4fff968f28b7e
SHA512

f84f29779536287b47563e8b6ee4991cb57e00d1a8e435962f34ca1fa04b34826c49c315da5cb93de2b51e2040022d77eb6be2346587f19e9181b7fa8f5b0f91
SSDEEP

1536:z27PB7p+ptvv/PjZ/17YjiQZAAe+boZ8XGPg8dlM4OlEJLRil:z27PB7itvftN7PHAe+boZ5gIfOlGIl

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

192.168.0.122:1234

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2648-1-0x0000000001340000-0x000000000135A000-memory.dmp	family_xworm
behavioral1/files/0x000b000000012282-8.dat	family_xworm
behavioral1/memory/2740-10-0x0000000000300000-0x000000000031A000-memory.dmp	family_xworm
behavioral1/memory/2924-15-0x00000000000F0000-0x000000000010A000-memory.dmp	family_xworm
behavioral1/memory/2348-17-0x0000000001010000-0x000000000102A000-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
2740	XClient.exe
2924	XClient.exe
2348	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-1-5-21-1846800975-3917212583-2893086201-1000\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
2756	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2648	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2648	XClient.exe
Token: SeDebugPrivilege	2648	XClient.exe
Token: SeDebugPrivilege	2740	XClient.exe
Token: SeDebugPrivilege	2924	XClient.exe
Token: SeDebugPrivilege	2348	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2648	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2756	2648	XClient.exe	30
PID 2648 wrote to memory of 2756	2648	XClient.exe	30
PID 2648 wrote to memory of 2756	2648	XClient.exe	30
PID 2716 wrote to memory of 2740	2716	taskeng.exe	33
PID 2716 wrote to memory of 2740	2716	taskeng.exe	33
PID 2716 wrote to memory of 2740	2716	taskeng.exe	33
PID 2716 wrote to memory of 2924	2716	taskeng.exe	34
PID 2716 wrote to memory of 2924	2716	taskeng.exe	34
PID 2716 wrote to memory of 2924	2716	taskeng.exe	34
PID 2716 wrote to memory of 2348	2716	taskeng.exe	36
PID 2716 wrote to memory of 2348	2716	taskeng.exe	36
PID 2716 wrote to memory of 2348	2716	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:2648
- 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:2756

C:\Windows\system32\taskeng.exe
taskeng.exe {0D549D79-F389-44B7-BDDD-5247E42E860B} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2716
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2740
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2924
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2348

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
76KB

MD5
b027cd851c4ab83c66c1c8516567e537

SHA1
c0afcc7cca0af22fd7b179d8366c1ab7b4d1804f

SHA256
34eb863221fc8e6894769217eed29c928c98abfff3f7e37901b4fff968f28b7e

SHA512
f84f29779536287b47563e8b6ee4991cb57e00d1a8e435962f34ca1fa04b34826c49c315da5cb93de2b51e2040022d77eb6be2346587f19e9181b7fa8f5b0f91

Download Submit
memory/2348-17-0x0000000001010000-0x000000000102A000-memory.dmp

Filesize
104KB

Download
memory/2648-0-0x000007FEF57C3000-0x000007FEF57C4000-memory.dmp

Filesize
4KB

Download
memory/2648-1-0x0000000001340000-0x000000000135A000-memory.dmp

Filesize
104KB

Download
memory/2648-6-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2648-11-0x000007FEF57C3000-0x000007FEF57C4000-memory.dmp

Filesize
4KB

Download
memory/2648-12-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2740-10-0x0000000000300000-0x000000000031A000-memory.dmp

Filesize
104KB

Download
memory/2924-15-0x00000000000F0000-0x000000000010A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads