xworm | 3394a84609088b9e0cc8e0e9df4c9f1c94f6fda2efc10164eef27bec071372e3

General

Target

XClient.exe
Size

156KB
MD5

49acade22394e1ad05b0a24ad2461d44
SHA1

2cc67fe90f60f39918de6e02755756d04a9ea6a6
SHA256

3394a84609088b9e0cc8e0e9df4c9f1c94f6fda2efc10164eef27bec071372e3
SHA512

f7b85b6594dbd5db200810c563a2de3a8be6c9d1b9796ee2b7c856fe1747b54cc467d23a2c15120368e2155c490788c3964c1515990cab4a930f59f67adfdd87
SSDEEP

1536:WRWZt9DWl8i9ko6zbQ8v/niOiN/NHERafjVm:kst08iWo6zbQ8yOiNVHEoY

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

places-y.gl.at.ply.gg:45473

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2016-1-0x0000000001380000-0x00000000013AE000-memory.dmp	family_xworm
behavioral1/files/0x0009000000015d0e-8.dat	family_xworm
behavioral1/memory/2688-17-0x00000000013A0000-0x00000000013CE000-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 2 IoCs

pid	Process
2688	XClient.exe
1256	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-1-5-21-1163522206-1469769407-485553996-1000\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
2612	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2016	XClient.exe
Token: SeDebugPrivilege	2016	XClient.exe
Token: SeDebugPrivilege	2688	XClient.exe
Token: SeDebugPrivilege	1256	XClient.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2016 wrote to memory of 2612	2016	XClient.exe	30
PID 2016 wrote to memory of 2612	2016	XClient.exe	30
PID 2016 wrote to memory of 2612	2016	XClient.exe	30
PID 2836 wrote to memory of 2688	2836	taskeng.exe	34
PID 2836 wrote to memory of 2688	2836	taskeng.exe	34
PID 2836 wrote to memory of 2688	2836	taskeng.exe	34
PID 2836 wrote to memory of 1256	2836	taskeng.exe	35
PID 2836 wrote to memory of 1256	2836	taskeng.exe	35
PID 2836 wrote to memory of 1256	2836	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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2016
- 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:2612

C:\Windows\system32\taskeng.exe
taskeng.exe {DA512B72-B72D-4DCF-9CD4-79EB10666A87} S-1-5-21-1163522206-1469769407-485553996-1000:PJCSDMRP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2836
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2688
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1256

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\Roaming\XClient.exe

Filesize
156KB

MD5
49acade22394e1ad05b0a24ad2461d44

SHA1
2cc67fe90f60f39918de6e02755756d04a9ea6a6

SHA256
3394a84609088b9e0cc8e0e9df4c9f1c94f6fda2efc10164eef27bec071372e3

SHA512
f7b85b6594dbd5db200810c563a2de3a8be6c9d1b9796ee2b7c856fe1747b54cc467d23a2c15120368e2155c490788c3964c1515990cab4a930f59f67adfdd87

Download Submit
memory/2016-0-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

Filesize
4KB

Download
memory/2016-1-0x0000000001380000-0x00000000013AE000-memory.dmp

Filesize
184KB

Download
memory/2016-10-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2016-11-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

Filesize
4KB

Download
memory/2016-12-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2688-17-0x00000000013A0000-0x00000000013CE000-memory.dmp

Filesize
184KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads