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
423s
max time network
426s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-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
behavioral4/memory/3108-1-0x0000000000150000-0x0000000000180000-memory.dmp	family_xworm
behavioral4/files/0x001d00000002aad8-6.dat	family_xworm

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

Executes dropped EXE 7 IoCs

pid	Process
2044	FlrefoxUpdate.exe
2148	FlrefoxUpdate.exe
1036	FlrefoxUpdate.exe
240	FlrefoxUpdate.exe
3208	FlrefoxUpdate.exe
3084	FlrefoxUpdate.exe
5092	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 (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "55"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4290799360"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365268"	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\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292114432"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365268"	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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292114432"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	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
3252	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3108	Firefox Installer (ratted).exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	3108	Firefox Installer (ratted).exe
Token: SeDebugPrivilege	3108	Firefox Installer (ratted).exe
Token: SeDebugPrivilege	2044	FlrefoxUpdate.exe
Token: SeDebugPrivilege	2148	FlrefoxUpdate.exe
Token: SeDebugPrivilege	1036	FlrefoxUpdate.exe
Token: SeDebugPrivilege	240	FlrefoxUpdate.exe
Token: SeDebugPrivilege	3208	FlrefoxUpdate.exe
Token: SeDebugPrivilege	3084	FlrefoxUpdate.exe
Token: SeDebugPrivilege	5092	FlrefoxUpdate.exe
Token: SeShutdownPrivilege	2128	shutdown.exe
Token: SeRemoteShutdownPrivilege	2128	shutdown.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3108	Firefox Installer (ratted).exe
1348	LogonUI.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3108 wrote to memory of 3252	3108	Firefox Installer (ratted).exe	79
PID 3108 wrote to memory of 3252	3108	Firefox Installer (ratted).exe	79
PID 3108 wrote to memory of 2128	3108	Firefox Installer (ratted).exe	89
PID 3108 wrote to memory of 2128	3108	Firefox Installer (ratted).exe	89

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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3108
- 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:3252
- C:\Windows\SYSTEM32\shutdown.exe
  shutdown.exe /f /s /t 0
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2128

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2044

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2148

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1036

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:240

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3208

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3084

C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5092

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3a06855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:1348

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

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Downloads

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

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

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

Filesize
170KB

MD5
200eb10c73336127006740ae06003933

SHA1
32ef06528018d4f9fc8da3a7e7e07363b3a143f4

SHA256
b46624ea261bec807dc1f93431ab3156450646976443c27322a7a9c4eec5e5f0

SHA512
026eb0e018f25449f664dbc2655cfb5c360fd60a928fec344bd31b3cefa01a3fcce4dd1fc87b3aabce7557db57cb1247a1984c69b3ecb00d83f388fd6b09a0ce

Download Submit
memory/2044-8-0x00007FFBF58D0000-0x00007FFBF6392000-memory.dmp

Filesize
10.8MB

Download
memory/2044-10-0x00007FFBF58D0000-0x00007FFBF6392000-memory.dmp

Filesize
10.8MB

Download
memory/3108-0-0x00007FFBF58D3000-0x00007FFBF58D5000-memory.dmp

Filesize
8KB

Download
memory/3108-1-0x0000000000150000-0x0000000000180000-memory.dmp

Filesize
192KB

Download
memory/3108-3-0x00007FFBF58D0000-0x00007FFBF6392000-memory.dmp

Filesize
10.8MB

Download
memory/3108-4-0x00007FFBF58D3000-0x00007FFBF58D5000-memory.dmp

Filesize
8KB

Download
memory/3108-5-0x00007FFBF58D0000-0x00007FFBF6392000-memory.dmp

Filesize
10.8MB

Download
memory/3108-18-0x00007FFBF58D0000-0x00007FFBF6392000-memory.dmp

Filesize
10.8MB

Download