xworm | 804cd41d9c68200b85e59b89a391a2f3fa88fbc1cf57666ccf891771938b4951

General

Target

XClient.exe
Size

63KB
MD5

2e74447298828c43f6cd6a4c656b8359
SHA1

9e593f738e97b5dc4edcc3ab352b61a257a104f0
SHA256

804cd41d9c68200b85e59b89a391a2f3fa88fbc1cf57666ccf891771938b4951
SHA512

fffd8a88b9575a502585dd2494796cef0606817f52ea812e60e3ec600bd6e5a9ac53aa1073e2adc38bb70940d6ef0406d0c23fbabaffec7e2471c121b5442167
SSDEEP

1536:yJlE+AF8qTLf1EHgEas5X8b3t747btByyszpXOvsd6yKi:yJlAhNY8b97EDylXOvsdFV

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

camera-recovered.gl.at.ply:25565

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2092-1-0x0000000001090000-0x00000000010A6000-memory.dmp	family_xworm
behavioral1/files/0x0008000000016d46-9.dat	family_xworm
behavioral1/memory/2612-11-0x0000000000B00000-0x0000000000B16000-memory.dmp	family_xworm
behavioral1/memory/1928-14-0x0000000000330000-0x0000000000346000-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
2612	XClient.exe
1928	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

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
2704	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2092	XClient.exe
Token: SeDebugPrivilege	2092	XClient.exe
Token: SeDebugPrivilege	2612	XClient.exe
Token: SeDebugPrivilege	1928	XClient.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 2704	2092	XClient.exe	32
PID 2092 wrote to memory of 2704	2092	XClient.exe	32
PID 2092 wrote to memory of 2704	2092	XClient.exe	32
PID 2784 wrote to memory of 2612	2784	taskeng.exe	35
PID 2784 wrote to memory of 2612	2784	taskeng.exe	35
PID 2784 wrote to memory of 2612	2784	taskeng.exe	35
PID 2784 wrote to memory of 1928	2784	taskeng.exe	36
PID 2784 wrote to memory of 1928	2784	taskeng.exe	36
PID 2784 wrote to memory of 1928	2784	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 use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2092
- 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:2704

C:\Windows\system32\taskeng.exe
taskeng.exe {8A1193A8-489F-4108-8C25-CF328BF0B5E3} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2784
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2612
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1928

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

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Downloads

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

Filesize
63KB

MD5
2e74447298828c43f6cd6a4c656b8359

SHA1
9e593f738e97b5dc4edcc3ab352b61a257a104f0

SHA256
804cd41d9c68200b85e59b89a391a2f3fa88fbc1cf57666ccf891771938b4951

SHA512
fffd8a88b9575a502585dd2494796cef0606817f52ea812e60e3ec600bd6e5a9ac53aa1073e2adc38bb70940d6ef0406d0c23fbabaffec7e2471c121b5442167

Download Submit
memory/1928-14-0x0000000000330000-0x0000000000346000-memory.dmp

Filesize
88KB

Download
memory/2092-0-0x000007FEF6313000-0x000007FEF6314000-memory.dmp

Filesize
4KB

Download
memory/2092-1-0x0000000001090000-0x00000000010A6000-memory.dmp

Filesize
88KB

Download
memory/2092-2-0x000007FEF6310000-0x000007FEF6CFC000-memory.dmp

Filesize
9.9MB

Download
memory/2092-7-0x000007FEF6310000-0x000007FEF6CFC000-memory.dmp

Filesize
9.9MB

Download
memory/2612-11-0x0000000000B00000-0x0000000000B16000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads