xworm | b46624ea261bec807dc1f93431ab3156450646976443c27322a7a9c4eec5e5f0 | Triage

Resubmissions

13-01-2025 01:00

250113-bcnq5axqbt 10

09-01-2025 12:16

250109-pfhwyazjhs 10

06-01-2025 14:21

250106-rpb6vs1kgr 10

02-01-2025 20:47

250102-zlagvsvpdv 10

02-01-2025 20:45

250102-zjvd9ayjar 10

Analysis

max time kernel
426s
max time network
429s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
09-01-2025 12:16

Sharing

Reason

Machine shutdown

Report Analysis Logs

General

Target

Firefox Installer (ratted).exe
Size

170KB
MD5

200eb10c73336127006740ae06003933
SHA1

32ef06528018d4f9fc8da3a7e7e07363b3a143f4
SHA256

b46624ea261bec807dc1f93431ab3156450646976443c27322a7a9c4eec5e5f0
SHA512

026eb0e018f25449f664dbc2655cfb5c360fd60a928fec344bd31b3cefa01a3fcce4dd1fc87b3aabce7557db57cb1247a1984c69b3ecb00d83f388fd6b09a0ce
SSDEEP

1536:4ig4nFL9z2BOwVCMs6se7llqn17KineXd2wVKtivEYoNRh8RX9EIKhI49No:5zFL9zWOw7sgbcUieNJqKoPC5+Lm

Score

10^/10

xworm rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

109.231.31.129:2021

Mutex

H7HNKbba3h7eEPOa

Attributes

Install_directory
%AppData%
install_file
FlrefoxUpdate.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral3/memory/1012-1-0x0000000000360000-0x0000000000390000-memory.dmp	family_xworm
behavioral3/files/0x0028000000046196-6.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-1-5-21-1006597246-3150276181-3318461161-1000\Control Panel\International\Geo\Nation	Firefox Installer (ratted).exe

Executes dropped EXE 7 IoCs

pid	Process
780	FlrefoxUpdate.exe
4452	FlrefoxUpdate.exe
5880	FlrefoxUpdate.exe
3240	FlrefoxUpdate.exe
4052	FlrefoxUpdate.exe
4836	FlrefoxUpdate.exe
4568	FlrefoxUpdate.exe

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

System Information Discovery
T1082

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "174"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.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

pid	Process
4684	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1012	Firefox Installer (ratted).exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	1012	Firefox Installer (ratted).exe
Token: SeDebugPrivilege	1012	Firefox Installer (ratted).exe
Token: SeDebugPrivilege	780	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4452	FlrefoxUpdate.exe
Token: SeDebugPrivilege	5880	FlrefoxUpdate.exe
Token: SeDebugPrivilege	3240	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4052	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4836	FlrefoxUpdate.exe
Token: SeDebugPrivilege	4568	FlrefoxUpdate.exe
Token: SeShutdownPrivilege	6048	shutdown.exe
Token: SeRemoteShutdownPrivilege	6048	shutdown.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1012	Firefox Installer (ratted).exe
2908	LogonUI.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1012 wrote to memory of 4684	1012	Firefox Installer (ratted).exe	89
PID 1012 wrote to memory of 4684	1012	Firefox Installer (ratted).exe	89
PID 1012 wrote to memory of 6048	1012	Firefox Installer (ratted).exe	102
PID 1012 wrote to memory of 6048	1012	Firefox Installer (ratted).exe	102

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\Firefox Installer (ratted).exe
"C:\Users\Admin\AppData\Local\Temp\Firefox Installer (ratted).exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1012
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FlrefoxUpdate" /tr "C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4684
- C:\Windows\SYSTEM32\shutdown.exe
  shutdown.exe /f /s /t 0
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:6048

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
"C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:780

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
"C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4452

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
"C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5880

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
"C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3240

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
"C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4052

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
"C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4836

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
"C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4568

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3a1c055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:2908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

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\Local\Microsoft\CLR_v4.0\UsageLogs\FlrefoxUpdate.exe.log

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

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

Filesize
170KB

MD5
200eb10c73336127006740ae06003933

SHA1
32ef06528018d4f9fc8da3a7e7e07363b3a143f4

SHA256
b46624ea261bec807dc1f93431ab3156450646976443c27322a7a9c4eec5e5f0

SHA512
026eb0e018f25449f664dbc2655cfb5c360fd60a928fec344bd31b3cefa01a3fcce4dd1fc87b3aabce7557db57cb1247a1984c69b3ecb00d83f388fd6b09a0ce

Download Submit
memory/780-8-0x00007FFAD7F10000-0x00007FFAD89D2000-memory.dmp

Filesize
10.8MB

Download
memory/780-10-0x00007FFAD7F10000-0x00007FFAD89D2000-memory.dmp

Filesize
10.8MB

Download
memory/1012-0-0x00007FFAD7F13000-0x00007FFAD7F15000-memory.dmp

Filesize
8KB

Download
memory/1012-1-0x0000000000360000-0x0000000000390000-memory.dmp

Filesize
192KB

Download
memory/1012-3-0x00007FFAD7F10000-0x00007FFAD89D2000-memory.dmp

Filesize
10.8MB

Download
memory/1012-4-0x00007FFAD7F13000-0x00007FFAD7F15000-memory.dmp

Filesize
8KB

Download
memory/1012-5-0x00007FFAD7F10000-0x00007FFAD89D2000-memory.dmp

Filesize
10.8MB

Download
memory/1012-18-0x00007FFAD7F10000-0x00007FFAD89D2000-memory.dmp

Filesize
10.8MB

Download