xworm | 31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d | Triage

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-11-2024 10:14

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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 2 IoCs

resource	yara_rule
behavioral2/memory/4880-1-0x00000000006C0000-0x00000000006D8000-memory.dmp	family_xworm
behavioral2/files/0x0002000000022ab5-9.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	eternal.exe

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 3 IoCs

pid	Process
1452	XClient.exe
5096	XClient.exe
1104	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-1-5-21-3350944739-639801879-157714471-1000\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
3548	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4880	eternal.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4880	eternal.exe
Token: SeDebugPrivilege	4880	eternal.exe
Token: SeDebugPrivilege	1452	XClient.exe
Token: SeDebugPrivilege	5096	XClient.exe
Token: SeDebugPrivilege	1104	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4880	eternal.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4880 wrote to memory of 3548	4880	eternal.exe	94
PID 4880 wrote to memory of 3548	4880	eternal.exe	94

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⤵
- Checks computer location settings
- 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:4880
- 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:3548

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1452

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5096

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1104

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
69KB

MD5
7439cc991a9a756c41153b8e9121baab

SHA1
c62528386e5f62ff2975cc8ed0cad3a7d362e632

SHA256
31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d

SHA512
cbdfd77671884407f8f4bd9c5251df5d8896b29bd004ea52460eda8a222df7492c69572e044376315624220f3ea66de3aff34323ea281591ca2975f90fa6dd51

Download Submit
memory/1452-11-0x00007FFF98FF0000-0x00007FFF99AB1000-memory.dmp

Filesize
10.8MB

Download
memory/1452-13-0x00007FFF98FF0000-0x00007FFF99AB1000-memory.dmp

Filesize
10.8MB

Download
memory/4880-0-0x00007FFF98FF3000-0x00007FFF98FF5000-memory.dmp

Filesize
8KB

Download
memory/4880-1-0x00000000006C0000-0x00000000006D8000-memory.dmp

Filesize
96KB

Download
memory/4880-6-0x00007FFF98FF0000-0x00007FFF99AB1000-memory.dmp

Filesize
10.8MB

Download
memory/4880-7-0x00007FFF98FF3000-0x00007FFF98FF5000-memory.dmp

Filesize
8KB

Download
memory/4880-8-0x00007FFF98FF0000-0x00007FFF99AB1000-memory.dmp

Filesize
10.8MB

Download