xworm | 1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba

General

Target

1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe
Size

170KB
MD5

a805c895c507a30f12e39e04f55a7bf1
SHA1

1871cc40e2c48397f54d96d6be8fe07c0b615fa1
SHA256

1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba
SHA512

5b1b85a835c0d2f5253e2d421541344b1798365a8f25131f73b12df578958b257ab89d602ebff8974750dd76cf2fe5195ef9da6f7f017f180927f771121c02e1
SSDEEP

3072:T7FTPCDwNXHwR8bOH9yE8OB7SnFTM+lmsolAIrRuw+mqv9j1MWLQM:T7FTaDwRk8b09N/7S4+lDAA

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:1234

143.198.208.124:1234

Attributes

Install_directory
%Temp%
install_file
XClient.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2728-1-0x0000000000E50000-0x0000000000E80000-memory.dmp	family_xworm
behavioral1/files/0x0009000000012031-10.dat	family_xworm
behavioral1/memory/2368-12-0x0000000000DF0000-0x0000000000E20000-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\XClient.lnk	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe

Executes dropped EXE 2 IoCs

pid	Process
2368	XClient.exe
1688	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-1-5-21-3450744190-3404161390-554719085-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Local\\Temp\\XClient.exe"	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.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
4	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
2516	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2728	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2728	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe
Token: SeDebugPrivilege	2728	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe
Token: SeDebugPrivilege	2368	XClient.exe
Token: SeDebugPrivilege	1688	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2728	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2728 wrote to memory of 2516	2728	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe	31
PID 2728 wrote to memory of 2516	2728	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe	31
PID 2728 wrote to memory of 2516	2728	1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe	31
PID 1592 wrote to memory of 2368	1592	taskeng.exe	35
PID 1592 wrote to memory of 2368	1592	taskeng.exe	35
PID 1592 wrote to memory of 2368	1592	taskeng.exe	35
PID 1592 wrote to memory of 1688	1592	taskeng.exe	36
PID 1592 wrote to memory of 1688	1592	taskeng.exe	36
PID 1592 wrote to memory of 1688	1592	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\1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.exe
"C:\Users\Admin\AppData\Local\Temp\1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba.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:2728
- 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\Local\Temp\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2516

C:\Windows\system32\taskeng.exe
taskeng.exe {F88F2463-EB55-43F4-907D-F1D81E39A67B} S-1-5-21-3450744190-3404161390-554719085-1000:PDIZKVQX\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1592
- C:\Users\Admin\AppData\Local\Temp\XClient.exe
  C:\Users\Admin\AppData\Local\Temp\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2368
- C:\Users\Admin\AppData\Local\Temp\XClient.exe
  C:\Users\Admin\AppData\Local\Temp\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1688

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\Local\Temp\XClient.exe

Filesize
170KB

MD5
a805c895c507a30f12e39e04f55a7bf1

SHA1
1871cc40e2c48397f54d96d6be8fe07c0b615fa1

SHA256
1f002be3e2c89853aab023bcfac564bf6a2f0fe4d3ff936444594964413b6fba

SHA512
5b1b85a835c0d2f5253e2d421541344b1798365a8f25131f73b12df578958b257ab89d602ebff8974750dd76cf2fe5195ef9da6f7f017f180927f771121c02e1

Download Submit
memory/2368-12-0x0000000000DF0000-0x0000000000E20000-memory.dmp

Filesize
192KB

Download
memory/2728-0-0x000007FEF5A83000-0x000007FEF5A84000-memory.dmp

Filesize
4KB

Download
memory/2728-1-0x0000000000E50000-0x0000000000E80000-memory.dmp

Filesize
192KB

Download
memory/2728-2-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

Filesize
9.9MB

Download
memory/2728-7-0x000007FEF5A83000-0x000007FEF5A84000-memory.dmp

Filesize
4KB

Download
memory/2728-8-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads