xworm | 31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d | Triage

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-11-2024 10:14

Sharing

Report Analysis Logs

General

Target

eternal.exe
Size

69KB
MD5

7439cc991a9a756c41153b8e9121baab
SHA1

c62528386e5f62ff2975cc8ed0cad3a7d362e632
SHA256

31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d
SHA512

cbdfd77671884407f8f4bd9c5251df5d8896b29bd004ea52460eda8a222df7492c69572e044376315624220f3ea66de3aff34323ea281591ca2975f90fa6dd51
SSDEEP

1536:dEmkVu+xslqytUTZfJM6htYxrlYCbM1/kCxtD6LOSIcRGPUC:dEZZx8q/fJLtYFZbM1segO3cQ8C

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.23:33942

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2484-1-0x0000000000380000-0x0000000000398000-memory.dmp	family_xworm
behavioral1/files/0x00080000000120ff-10.dat	family_xworm
behavioral1/memory/2308-12-0x0000000000B80000-0x0000000000B98000-memory.dmp	family_xworm
behavioral1/memory/2956-15-0x00000000012D0000-0x00000000012E8000-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	eternal.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	eternal.exe

Executes dropped EXE 2 IoCs

pid	Process
2308	XClient.exe
2956	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	eternal.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

pid	Process
2820	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2484	eternal.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2484	eternal.exe
Token: SeDebugPrivilege	2484	eternal.exe
Token: SeDebugPrivilege	2308	XClient.exe
Token: SeDebugPrivilege	2956	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2484	eternal.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2484 wrote to memory of 2820	2484	eternal.exe	30
PID 2484 wrote to memory of 2820	2484	eternal.exe	30
PID 2484 wrote to memory of 2820	2484	eternal.exe	30
PID 2664 wrote to memory of 2308	2664	taskeng.exe	34
PID 2664 wrote to memory of 2308	2664	taskeng.exe	34
PID 2664 wrote to memory of 2308	2664	taskeng.exe	34
PID 2664 wrote to memory of 2956	2664	taskeng.exe	35
PID 2664 wrote to memory of 2956	2664	taskeng.exe	35
PID 2664 wrote to memory of 2956	2664	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\eternal.exe
"C:\Users\Admin\AppData\Local\Temp\eternal.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:2484
- 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:2820

C:\Windows\system32\taskeng.exe
taskeng.exe {DE4D5EC2-FAE2-4207-ACD1-58ABCF42D19B} S-1-5-21-3533259084-2542256011-65585152-1000:XPAJOTIY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2664
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2308
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2956

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Scheduled Task

Defense Evasion

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
69KB

MD5
7439cc991a9a756c41153b8e9121baab

SHA1
c62528386e5f62ff2975cc8ed0cad3a7d362e632

SHA256
31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d

SHA512
cbdfd77671884407f8f4bd9c5251df5d8896b29bd004ea52460eda8a222df7492c69572e044376315624220f3ea66de3aff34323ea281591ca2975f90fa6dd51

Download Submit
memory/2308-12-0x0000000000B80000-0x0000000000B98000-memory.dmp

Filesize
96KB

Download
memory/2484-0-0x000007FEF5443000-0x000007FEF5444000-memory.dmp

Filesize
4KB

Download
memory/2484-1-0x0000000000380000-0x0000000000398000-memory.dmp

Filesize
96KB

Download
memory/2484-6-0x000007FEF5440000-0x000007FEF5E2C000-memory.dmp

Filesize
9.9MB

Download
memory/2484-7-0x000007FEF5443000-0x000007FEF5444000-memory.dmp

Filesize
4KB

Download
memory/2484-8-0x000007FEF5440000-0x000007FEF5E2C000-memory.dmp

Filesize
9.9MB

Download
memory/2956-15-0x00000000012D0000-0x00000000012E8000-memory.dmp

Filesize
96KB

Download