xworm | 340830c7cba818a4e94a7791432f6a3e29bf103ebb47c70a6cb61e53c0ee5b2a

Resubmissions

28-10-2024 00:28

241028-asb7lawcqb 10

21-10-2024 19:42

241021-yemm6ssdnd 10

Analysis

max time kernel
1034s
max time network
1050s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
28-10-2024 00:28

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General

Target

FireFoxSetup.exe
Size

171KB
MD5

014b0ea8fe05df0fdea1710537dabe57
SHA1

91b47cd15009aceba1040cadabf3aa7cd6279a48
SHA256

340830c7cba818a4e94a7791432f6a3e29bf103ebb47c70a6cb61e53c0ee5b2a
SHA512

8503e8cd78442535226f41ba5d12dc0a20732940a24f865eb156ab9e75d6b4330bfdd10abba8add37713447317280f7b30f8c30bfb9f8642d15506a17e4d12d0
SSDEEP

1536:qDEV10wHVJKuuwhSMEFv9by6POwWTCs6se7llqn17KineXd2wVKtivEYoNRh8RXt:dfjhaFv9bjOwFsgbcUieNJqKoPC5+Ls

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

147.185.221.22:43768

Mutex

2bRkaANDDdoPipKE

Attributes

Install_directory
%AppData%
install_file
FireFox.exe

aes.plain

Signatures

Detect Xworm Payload 10 IoCs

resource	yara_rule
behavioral1/memory/108-1-0x0000000000D60000-0x0000000000D90000-memory.dmp	family_xworm
behavioral1/files/0x000b000000016ccc-34.dat	family_xworm
behavioral1/memory/2676-36-0x0000000000E70000-0x0000000000EA0000-memory.dmp	family_xworm
behavioral1/memory/1096-40-0x0000000000310000-0x0000000000340000-memory.dmp	family_xworm
behavioral1/memory/2372-42-0x0000000001220000-0x0000000001250000-memory.dmp	family_xworm
behavioral1/memory/960-47-0x0000000000010000-0x0000000000040000-memory.dmp	family_xworm
behavioral1/memory/2484-49-0x00000000011E0000-0x0000000001210000-memory.dmp	family_xworm
behavioral1/memory/2900-51-0x00000000012F0000-0x0000000001320000-memory.dmp	family_xworm
behavioral1/memory/2840-55-0x0000000001310000-0x0000000001340000-memory.dmp	family_xworm
behavioral1/memory/2300-60-0x0000000000350000-0x0000000000380000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3068	powershell.exe
2904	powershell.exe
2876	powershell.exe
2856	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 17 IoCs

pid	Process
2676	FireFox.exe
2132	FireFox.exe
1096	FireFox.exe
2372	FireFox.exe
2684	FireFox.exe
852	FireFox.exe
2540	FireFox.exe
960	FireFox.exe
2484	FireFox.exe
2900	FireFox.exe
2396	FireFox.exe
1632	FireFox.exe
2840	FireFox.exe
1744	FireFox.exe
1476	FireFox.exe
2900	FireFox.exe
2300	FireFox.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\FireFox = "C:\\Users\\Admin\\AppData\\Roaming\\FireFox.exe"	FireFoxSetup.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
2024	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3068	powershell.exe
2904	powershell.exe
2876	powershell.exe
2856	powershell.exe
108	FireFoxSetup.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeDebugPrivilege	108	FireFoxSetup.exe
Token: SeDebugPrivilege	3068	powershell.exe
Token: SeDebugPrivilege	2904	powershell.exe
Token: SeDebugPrivilege	2876	powershell.exe
Token: SeDebugPrivilege	2856	powershell.exe
Token: SeDebugPrivilege	108	FireFoxSetup.exe
Token: SeDebugPrivilege	2676	FireFox.exe
Token: SeDebugPrivilege	2132	FireFox.exe
Token: SeDebugPrivilege	1096	FireFox.exe
Token: SeDebugPrivilege	2372	FireFox.exe
Token: SeDebugPrivilege	2684	FireFox.exe
Token: SeDebugPrivilege	852	FireFox.exe
Token: SeDebugPrivilege	2540	FireFox.exe
Token: SeDebugPrivilege	960	FireFox.exe
Token: SeDebugPrivilege	2484	FireFox.exe
Token: SeDebugPrivilege	2900	FireFox.exe
Token: SeDebugPrivilege	2396	FireFox.exe
Token: SeDebugPrivilege	1632	FireFox.exe
Token: SeDebugPrivilege	2840	FireFox.exe
Token: SeDebugPrivilege	1744	FireFox.exe
Token: SeDebugPrivilege	1476	FireFox.exe
Token: SeDebugPrivilege	2900	FireFox.exe
Token: SeDebugPrivilege	2300	FireFox.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
108	FireFoxSetup.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 108 wrote to memory of 3068	108	FireFoxSetup.exe	29
PID 108 wrote to memory of 3068	108	FireFoxSetup.exe	29
PID 108 wrote to memory of 3068	108	FireFoxSetup.exe	29
PID 108 wrote to memory of 2904	108	FireFoxSetup.exe	31
PID 108 wrote to memory of 2904	108	FireFoxSetup.exe	31
PID 108 wrote to memory of 2904	108	FireFoxSetup.exe	31
PID 108 wrote to memory of 2876	108	FireFoxSetup.exe	33
PID 108 wrote to memory of 2876	108	FireFoxSetup.exe	33
PID 108 wrote to memory of 2876	108	FireFoxSetup.exe	33
PID 108 wrote to memory of 2856	108	FireFoxSetup.exe	35
PID 108 wrote to memory of 2856	108	FireFoxSetup.exe	35
PID 108 wrote to memory of 2856	108	FireFoxSetup.exe	35
PID 108 wrote to memory of 2024	108	FireFoxSetup.exe	37
PID 108 wrote to memory of 2024	108	FireFoxSetup.exe	37
PID 108 wrote to memory of 2024	108	FireFoxSetup.exe	37
PID 1120 wrote to memory of 2676	1120	taskeng.exe	40
PID 1120 wrote to memory of 2676	1120	taskeng.exe	40
PID 1120 wrote to memory of 2676	1120	taskeng.exe	40
PID 1120 wrote to memory of 2132	1120	taskeng.exe	41
PID 1120 wrote to memory of 2132	1120	taskeng.exe	41
PID 1120 wrote to memory of 2132	1120	taskeng.exe	41
PID 1120 wrote to memory of 1096	1120	taskeng.exe	42
PID 1120 wrote to memory of 1096	1120	taskeng.exe	42
PID 1120 wrote to memory of 1096	1120	taskeng.exe	42
PID 1120 wrote to memory of 2372	1120	taskeng.exe	43
PID 1120 wrote to memory of 2372	1120	taskeng.exe	43
PID 1120 wrote to memory of 2372	1120	taskeng.exe	43
PID 1120 wrote to memory of 2684	1120	taskeng.exe	44
PID 1120 wrote to memory of 2684	1120	taskeng.exe	44
PID 1120 wrote to memory of 2684	1120	taskeng.exe	44
PID 1120 wrote to memory of 852	1120	taskeng.exe	45
PID 1120 wrote to memory of 852	1120	taskeng.exe	45
PID 1120 wrote to memory of 852	1120	taskeng.exe	45
PID 1120 wrote to memory of 2540	1120	taskeng.exe	46
PID 1120 wrote to memory of 2540	1120	taskeng.exe	46
PID 1120 wrote to memory of 2540	1120	taskeng.exe	46
PID 1120 wrote to memory of 960	1120	taskeng.exe	47
PID 1120 wrote to memory of 960	1120	taskeng.exe	47
PID 1120 wrote to memory of 960	1120	taskeng.exe	47
PID 1120 wrote to memory of 2484	1120	taskeng.exe	48
PID 1120 wrote to memory of 2484	1120	taskeng.exe	48
PID 1120 wrote to memory of 2484	1120	taskeng.exe	48
PID 1120 wrote to memory of 2900	1120	taskeng.exe	49
PID 1120 wrote to memory of 2900	1120	taskeng.exe	49
PID 1120 wrote to memory of 2900	1120	taskeng.exe	49
PID 1120 wrote to memory of 2396	1120	taskeng.exe	50
PID 1120 wrote to memory of 2396	1120	taskeng.exe	50
PID 1120 wrote to memory of 2396	1120	taskeng.exe	50
PID 1120 wrote to memory of 1632	1120	taskeng.exe	51
PID 1120 wrote to memory of 1632	1120	taskeng.exe	51
PID 1120 wrote to memory of 1632	1120	taskeng.exe	51
PID 1120 wrote to memory of 2840	1120	taskeng.exe	52
PID 1120 wrote to memory of 2840	1120	taskeng.exe	52
PID 1120 wrote to memory of 2840	1120	taskeng.exe	52
PID 1120 wrote to memory of 1744	1120	taskeng.exe	53
PID 1120 wrote to memory of 1744	1120	taskeng.exe	53
PID 1120 wrote to memory of 1744	1120	taskeng.exe	53
PID 1120 wrote to memory of 1476	1120	taskeng.exe	54
PID 1120 wrote to memory of 1476	1120	taskeng.exe	54
PID 1120 wrote to memory of 1476	1120	taskeng.exe	54
PID 1120 wrote to memory of 2900	1120	taskeng.exe	55
PID 1120 wrote to memory of 2900	1120	taskeng.exe	55
PID 1120 wrote to memory of 2900	1120	taskeng.exe	55
PID 1120 wrote to memory of 2300	1120	taskeng.exe	56

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\FireFoxSetup.exe
"C:\Users\Admin\AppData\Local\Temp\FireFoxSetup.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:108
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\FireFoxSetup.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3068
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'FireFoxSetup.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2904
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\FireFox.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2876
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'FireFox.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2856
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FireFox" /tr "C:\Users\Admin\AppData\Roaming\FireFox.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2024

C:\Windows\system32\taskeng.exe
taskeng.exe {2440C284-9800-49D3-9AA2-967791019D07} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2676
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2132
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1096
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2372
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2684
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:852
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2540
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:960
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2484
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2900
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2396
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1632
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2840
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1744
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1476
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2900
- C:\Users\Admin\AppData\Roaming\FireFox.exe
  C:\Users\Admin\AppData\Roaming\FireFox.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2300

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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:\Users\Admin\AppData\Roaming\FireFox.exe

Filesize
171KB

MD5
014b0ea8fe05df0fdea1710537dabe57

SHA1
91b47cd15009aceba1040cadabf3aa7cd6279a48

SHA256
340830c7cba818a4e94a7791432f6a3e29bf103ebb47c70a6cb61e53c0ee5b2a

SHA512
8503e8cd78442535226f41ba5d12dc0a20732940a24f865eb156ab9e75d6b4330bfdd10abba8add37713447317280f7b30f8c30bfb9f8642d15506a17e4d12d0

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
d6045d625b5b0ab39178b338be2bfddf

SHA1
8da39a7cf42f8fc7565b2d65ba8b6961f6a8ae58

SHA256
9cf5e451dad8576c88a4d5408044ea280342618b91797ad71c50bea38185c436

SHA512
eb26fcea5be79106e5933573b88b776b25741027588b6139942380d888dbec8c1183cc54e8a7848e165c98d79b59dc7576f27783429468b516934a7c4a96d1c4

Download Submit
memory/108-32-0x000000001B300000-0x000000001B380000-memory.dmp

Filesize
512KB

Download
memory/108-26-0x000007FEF65A3000-0x000007FEF65A4000-memory.dmp

Filesize
4KB

Download
memory/108-1-0x0000000000D60000-0x0000000000D90000-memory.dmp

Filesize
192KB

Download
memory/108-0-0x000007FEF65A3000-0x000007FEF65A4000-memory.dmp

Filesize
4KB

Download
memory/108-31-0x000000001B300000-0x000000001B380000-memory.dmp

Filesize
512KB

Download
memory/960-47-0x0000000000010000-0x0000000000040000-memory.dmp

Filesize
192KB

Download
memory/1096-40-0x0000000000310000-0x0000000000340000-memory.dmp

Filesize
192KB

Download
memory/2300-60-0x0000000000350000-0x0000000000380000-memory.dmp

Filesize
192KB

Download
memory/2372-42-0x0000000001220000-0x0000000001250000-memory.dmp

Filesize
192KB

Download
memory/2484-49-0x00000000011E0000-0x0000000001210000-memory.dmp

Filesize
192KB

Download
memory/2676-36-0x0000000000E70000-0x0000000000EA0000-memory.dmp

Filesize
192KB

Download
memory/2840-55-0x0000000001310000-0x0000000001340000-memory.dmp

Filesize
192KB

Download
memory/2900-51-0x00000000012F0000-0x0000000001320000-memory.dmp

Filesize
192KB

Download
memory/2904-15-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2904-14-0x000000001B1F0000-0x000000001B4D2000-memory.dmp

Filesize
2.9MB

Download
memory/3068-6-0x0000000002750000-0x00000000027D0000-memory.dmp

Filesize
512KB

Download
memory/3068-8-0x0000000002470000-0x0000000002478000-memory.dmp

Filesize
32KB

Download
memory/3068-7-0x000000001B290000-0x000000001B572000-memory.dmp

Filesize
2.9MB

Download