xworm | 3465eee847488e3fd2f70bc78642ce8f82cbef40b95b5ac448901d9e13c07dbb

Analysis

max time kernel
65s
max time network
60s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
09-11-2024 14:37

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General

Target

XClient.exe
Size

76KB
MD5

8807fa0a397ac570dd8b1d6bed1aadc5
SHA1

27531764eb5629d02ef10ad25a89328daa442f5a
SHA256

3465eee847488e3fd2f70bc78642ce8f82cbef40b95b5ac448901d9e13c07dbb
SHA512

ebedb1bd4ee83d2e1f97868c0cd5574e34deb2e61db2ec01e3ae32f11e979504a527391fdd3dcad02f785a4ea7d87084b23f396316a06fda3e01f8f1341f790b
SSDEEP

1536:eX3pX/Z0rG675wHvayJbtE+bC5v5tUfJ3X1QkOyog9B3Kqb8:eX3R/KrN74ayJa+bCVQRekOG9Baqb8

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

192.168.29.241:22119

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/4348-1-0x00000000002B0000-0x00000000002C8000-memory.dmp	family_xworm
behavioral1/files/0x001a00000002aafa-11.dat	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\Comet.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Comet.lnk	XClient.exe

Executes dropped EXE 1 IoCs

pid	Process
3884	Comet

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-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Windows\CurrentVersion\Run\Comet = "C:\\ProgramData\\Comet"	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
2404	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4348	XClient.exe
4348	XClient.exe
4348	XClient.exe
4348	XClient.exe
4348	XClient.exe
4348	XClient.exe
4348	XClient.exe
4348	XClient.exe
4348	XClient.exe
4348	XClient.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4348	XClient.exe
Token: SeDebugPrivilege	4348	XClient.exe
Token: SeDebugPrivilege	3884	Comet

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4348	XClient.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4348 wrote to memory of 2404	4348	XClient.exe	79
PID 4348 wrote to memory of 2404	4348	XClient.exe	79

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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4348
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Comet" /tr "C:\ProgramData\Comet"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2404

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1832

C:\ProgramData\Comet
C:\ProgramData\Comet
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3884

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Comet

Filesize
76KB

MD5
8807fa0a397ac570dd8b1d6bed1aadc5

SHA1
27531764eb5629d02ef10ad25a89328daa442f5a

SHA256
3465eee847488e3fd2f70bc78642ce8f82cbef40b95b5ac448901d9e13c07dbb

SHA512
ebedb1bd4ee83d2e1f97868c0cd5574e34deb2e61db2ec01e3ae32f11e979504a527391fdd3dcad02f785a4ea7d87084b23f396316a06fda3e01f8f1341f790b

Download Submit
memory/4348-0-0x00007FF9F68C3000-0x00007FF9F68C5000-memory.dmp

Filesize
8KB

Download
memory/4348-1-0x00000000002B0000-0x00000000002C8000-memory.dmp

Filesize
96KB

Download
memory/4348-5-0x00007FF9F68C0000-0x00007FF9F7382000-memory.dmp

Filesize
10.8MB

Download
memory/4348-6-0x00007FF9F68C3000-0x00007FF9F68C5000-memory.dmp

Filesize
8KB

Download
memory/4348-7-0x00007FF9F68C0000-0x00007FF9F7382000-memory.dmp

Filesize
10.8MB

Download