xworm | 120286ca0a3f1e3805d5268c3110ac338b1d086ae5487bd25fdf4e1d917b1bce

General

Target

XwormV5.3.exe
Size

15.0MB
MD5

d0eec7cf80098a85e6628d8834b7e153
SHA1

aef442dbe12344111955d8a3b92427f03a8808b5
SHA256

120286ca0a3f1e3805d5268c3110ac338b1d086ae5487bd25fdf4e1d917b1bce
SHA512

50db066cc6e7402f635c73d4f770d0202b6c112db56a9d858c42df4f5816a07679f8f6c52efad0ce609390b792f4bd6887f39d5a9fddbd4ede912fb4fafcfa3b
SSDEEP

393216:iwTnaP1qOj5Dg/lgp8BOVF3DS2k4tUUi6AreM:xTavq/q8w3DS2k4KNFr/

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

96phaok.localto.net:1605

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023b82-6.dat	family_xworm
behavioral2/memory/368-13-0x0000000000990000-0x00000000009A8000-memory.dmp	family_xworm

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

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	XwormV5.3.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FluxusV1.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FluxusV1.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
368	XClient.exe
3336	Xworm V5.6.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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\FluxusV1 = "C:\\Users\\Admin\\AppData\\Roaming\\FluxusV1.2"	XClient.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	OpenWith.exe

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
2788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
368	XClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	368	XClient.exe
Token: SeDebugPrivilege	368	XClient.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
368	XClient.exe
1596	OpenWith.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2196 wrote to memory of 368	2196	XwormV5.3.exe	86
PID 2196 wrote to memory of 368	2196	XwormV5.3.exe	86
PID 2196 wrote to memory of 3336	2196	XwormV5.3.exe	88
PID 2196 wrote to memory of 3336	2196	XwormV5.3.exe	88
PID 368 wrote to memory of 2788	368	XClient.exe	92
PID 368 wrote to memory of 2788	368	XClient.exe	92

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\XwormV5.3.exe
"C:\Users\Admin\AppData\Local\Temp\XwormV5.3.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Users\Admin\AppData\Roaming\XClient.exe
  "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:368
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FluxusV1" /tr "C:\Users\Admin\AppData\Roaming\FluxusV1.2"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2788
- C:\Users\Admin\AppData\Roaming\Xworm V5.6.exe
  "C:\Users\Admin\AppData\Roaming\Xworm V5.6.exe"
  2⤵
  - Executes dropped EXE
  PID:3336

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe "C:\Users\Admin\AppData\Roaming\FluxusV1.2"
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:1596

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
72KB

MD5
acda38bc148d671863e1d32b577d7333

SHA1
6f9ed2412a759be9f23338da22a8c97e0617f6b4

SHA256
107932c23964beddec38325b5a6cbb0af19d3a5f1419678d7ba5fbc6b858008c

SHA512
535f3864b1b977cbf5dc1985632dbae418a3f135f4218ee3c407940cf25461f150634f2f23eb84840a77a1b7762e74ce9af15d3681d599d44a5e5191c37c0bb0

Download Submit
C:\Users\Admin\AppData\Roaming\Xworm V5.6.exe

Filesize
14.9MB

MD5
56ccb739926a725e78a7acf9af52c4bb

SHA1
5b01b90137871c3c8f0d04f510c4d56b23932cbc

SHA256
90f58865f265722ab007abb25074b3fc4916e927402552c6be17ef9afac96405

SHA512
2fee662bc4a1a36ce7328b23f991fa4a383b628839e403d6eb6a9533084b17699a6c939509867a86e803aafef2f9def98fa9305b576dad754aa7f599920c19a1

Download Submit
memory/368-13-0x0000000000990000-0x00000000009A8000-memory.dmp

Filesize
96KB

Download
memory/368-14-0x00007FFA07DA0000-0x00007FFA08861000-memory.dmp

Filesize
10.8MB

Download
memory/368-32-0x00007FFA07DA0000-0x00007FFA08861000-memory.dmp

Filesize
10.8MB

Download
memory/368-34-0x00007FFA07DA0000-0x00007FFA08861000-memory.dmp

Filesize
10.8MB

Download
memory/368-35-0x00007FFA07DA0000-0x00007FFA08861000-memory.dmp

Filesize
10.8MB

Download
memory/2196-0-0x00007FFA07DA3000-0x00007FFA07DA5000-memory.dmp

Filesize
8KB

Download
memory/2196-1-0x0000000000370000-0x000000000126C000-memory.dmp

Filesize
15.0MB

Download
memory/3336-27-0x00007FFA07DA0000-0x00007FFA08861000-memory.dmp

Filesize
10.8MB

Download
memory/3336-28-0x00000112AF070000-0x00000112AFF58000-memory.dmp

Filesize
14.9MB

Download
memory/3336-33-0x00007FFA07DA0000-0x00007FFA08861000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads