xworm | fb0d45b0e48b0cdda2dd8c5a152f3c7a375c18d63e588f6a217c9d47f7d5199d

Analysis

max time kernel
166s
max time network
175s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
14-10-2023 03:22

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General

Target

Stub.exe
Size

59KB
MD5

5e898023998ac0c862eb3bd9694675d4
SHA1

1723f8f80a10a486e4e6bb080dd202a54546b108
SHA256

fb0d45b0e48b0cdda2dd8c5a152f3c7a375c18d63e588f6a217c9d47f7d5199d
SHA512

13a325448f9333d9a00e5e6cc8d2404a8bcfb2092648811f2c652e20ec3dce0068c5945912fe846452d0cb1902792b21a020f86068d1bb11e22252348d13d64f
SSDEEP

1536:NaagCTl3+ZVgvPgD79QZbIzaJh7PtzO022U:FgCF+ZKvPhZbICJ1zO07U

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

mo1010.duckdns.org:7000

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/5104-0-0x00000000004B0000-0x00000000004C6000-memory.dmp	family_xworm
behavioral2/files/0x000a0000000231ff-8.dat	family_xworm

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

Checks computer location settings 2 TTPs 1 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-1-5-21-2344688013-2965468717-2034126-1000\Control Panel\International\Geo\Nation	Stub.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Stub.lnk	Stub.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Stub.lnk	Stub.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-1-5-21-2344688013-2965468717-2034126-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Stub = "C:\\Users\\Admin\\AppData\\Roaming\\Stub.exe"	Stub.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2004	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5104	Stub.exe
5104	Stub.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5104	Stub.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5104	Stub.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5104 wrote to memory of 2004	5104	Stub.exe	91
PID 5104 wrote to memory of 2004	5104	Stub.exe	91

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\Stub.exe
"C:\Users\Admin\AppData\Local\Temp\Stub.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:5104
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Stub" /tr "C:\Users\Admin\AppData\Roaming\Stub.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2004

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
59KB

MD5
5e898023998ac0c862eb3bd9694675d4

SHA1
1723f8f80a10a486e4e6bb080dd202a54546b108

SHA256
fb0d45b0e48b0cdda2dd8c5a152f3c7a375c18d63e588f6a217c9d47f7d5199d

SHA512
13a325448f9333d9a00e5e6cc8d2404a8bcfb2092648811f2c652e20ec3dce0068c5945912fe846452d0cb1902792b21a020f86068d1bb11e22252348d13d64f

Download Submit
memory/5104-0-0x00000000004B0000-0x00000000004C6000-memory.dmp

Filesize
88KB

Download
memory/5104-1-0x00007FFA57490000-0x00007FFA57F51000-memory.dmp

Filesize
10.8MB

Download
memory/5104-10-0x000000001B1F0000-0x000000001B200000-memory.dmp

Filesize
64KB

Download
memory/5104-11-0x00007FFA57490000-0x00007FFA57F51000-memory.dmp

Filesize
10.8MB

Download
memory/5104-12-0x000000001B1F0000-0x000000001B200000-memory.dmp

Filesize
64KB

Download