7089a8179efa6c83ec6cac9f54648e85fb903e56a966c3a5874c5a95a81c3638

Analysis

max time kernel
1792s
max time network
1166s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
15/08/2024, 17:26

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General

Target
dashboard for all stealers (recomended for start)/paid dashboard.exe
Size 2.5MB
Sample240815-v1anystflf
SHA256 1811c7b5ddcc6637a782bf32db70b60bd0bf3ec2b3498716591f718cda25fd14
MD5 660e26001a8891e78135a09d3ec2623f
SHA1 bd95c1955be08eaecefa7b3dd1cbdac7387b6d06
SHA512 590df723aaa52806f664adec89bf6e8e570a9c88b4858131fb59f23e31ab3302189393bceb58fe1aa71475065aefab2d093d5f8ad6296693d4124e5a10a34e92
SSDEEP 49152:cCEz1VWQraflEcY8GSFJ2CBUm5htDRvG0JuH0Xv6GVO8UKlo:cn14QilESfFim15rtxUuo
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

discovery evasion persistence ransomware trojan upx

Malware Config

Signatures

UAC bypass 3 TTPs 2 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Disables Task Manager via registry modification
evasion

Checks computer location settings 2 TTPs 2 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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	paid dashboard.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
5000	bg.exe
2404	YSkullLock.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1032-0-0x0000000000400000-0x0000000000DD9000-memory.dmp	upx
behavioral2/memory/1032-40-0x0000000000400000-0x0000000000DD9000-memory.dmp	upx

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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\YellowSkull2 Special Program = "C:\\YSkullMBRSetup.exe"	reg.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\Desktop\Wallpaper = "c:\\yellowskull.bmp"	reg.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 50 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	paid dashboard.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	YSkullLock.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
4084	taskkill.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000_Classes\Local Settings	cmd.exe
Key created	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000_Classes\Local Settings\MuiCache	SearchApp.exe

Modifies registry key 1 TTPs 7 IoCs

Modify Registry

T1112

pid	Process
220	reg.exe
4676	reg.exe
2476	reg.exe
2252	reg.exe
1348	reg.exe
3100	reg.exe
3352	reg.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4084	taskkill.exe
Token: 33	4336	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	4336	AUDIODG.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2404	YSkullLock.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1032 wrote to memory of 2324	1032	paid dashboard.exe	85
PID 1032 wrote to memory of 2324	1032	paid dashboard.exe	85
PID 1032 wrote to memory of 2324	1032	paid dashboard.exe	85
PID 2324 wrote to memory of 1000	2324	cmd.exe	88
PID 2324 wrote to memory of 1000	2324	cmd.exe	88
PID 2324 wrote to memory of 1000	2324	cmd.exe	88
PID 2324 wrote to memory of 4684	2324	cmd.exe	89
PID 2324 wrote to memory of 4684	2324	cmd.exe	89
PID 2324 wrote to memory of 4684	2324	cmd.exe	89
PID 2324 wrote to memory of 4144	2324	cmd.exe	90
PID 2324 wrote to memory of 4144	2324	cmd.exe	90
PID 2324 wrote to memory of 4144	2324	cmd.exe	90
PID 2324 wrote to memory of 956	2324	cmd.exe	91
PID 2324 wrote to memory of 956	2324	cmd.exe	91
PID 2324 wrote to memory of 956	2324	cmd.exe	91
PID 2324 wrote to memory of 4020	2324	cmd.exe	92
PID 2324 wrote to memory of 4020	2324	cmd.exe	92
PID 2324 wrote to memory of 4020	2324	cmd.exe	92
PID 2324 wrote to memory of 3624	2324	cmd.exe	93
PID 2324 wrote to memory of 3624	2324	cmd.exe	93
PID 2324 wrote to memory of 3624	2324	cmd.exe	93
PID 2324 wrote to memory of 4544	2324	cmd.exe	94
PID 2324 wrote to memory of 4544	2324	cmd.exe	94
PID 2324 wrote to memory of 4544	2324	cmd.exe	94
PID 2324 wrote to memory of 1180	2324	cmd.exe	95
PID 2324 wrote to memory of 1180	2324	cmd.exe	95
PID 2324 wrote to memory of 1180	2324	cmd.exe	95
PID 2324 wrote to memory of 5068	2324	cmd.exe	96
PID 2324 wrote to memory of 5068	2324	cmd.exe	96
PID 2324 wrote to memory of 5068	2324	cmd.exe	96
PID 2324 wrote to memory of 4192	2324	cmd.exe	97
PID 2324 wrote to memory of 4192	2324	cmd.exe	97
PID 2324 wrote to memory of 4192	2324	cmd.exe	97
PID 2324 wrote to memory of 3892	2324	cmd.exe	98
PID 2324 wrote to memory of 3892	2324	cmd.exe	98
PID 2324 wrote to memory of 3892	2324	cmd.exe	98
PID 2324 wrote to memory of 4524	2324	cmd.exe	99
PID 2324 wrote to memory of 4524	2324	cmd.exe	99
PID 2324 wrote to memory of 4524	2324	cmd.exe	99
PID 2324 wrote to memory of 2532	2324	cmd.exe	100
PID 2324 wrote to memory of 2532	2324	cmd.exe	100
PID 2324 wrote to memory of 2532	2324	cmd.exe	100
PID 2324 wrote to memory of 4584	2324	cmd.exe	101
PID 2324 wrote to memory of 4584	2324	cmd.exe	101
PID 2324 wrote to memory of 4584	2324	cmd.exe	101
PID 2324 wrote to memory of 3908	2324	cmd.exe	102
PID 2324 wrote to memory of 3908	2324	cmd.exe	102
PID 2324 wrote to memory of 3908	2324	cmd.exe	102
PID 2324 wrote to memory of 5072	2324	cmd.exe	103
PID 2324 wrote to memory of 5072	2324	cmd.exe	103
PID 2324 wrote to memory of 5072	2324	cmd.exe	103
PID 2324 wrote to memory of 4320	2324	cmd.exe	104
PID 2324 wrote to memory of 4320	2324	cmd.exe	104
PID 2324 wrote to memory of 4320	2324	cmd.exe	104
PID 2324 wrote to memory of 2364	2324	cmd.exe	105
PID 2324 wrote to memory of 2364	2324	cmd.exe	105
PID 2324 wrote to memory of 2364	2324	cmd.exe	105
PID 2324 wrote to memory of 2168	2324	cmd.exe	106
PID 2324 wrote to memory of 2168	2324	cmd.exe	106
PID 2324 wrote to memory of 2168	2324	cmd.exe	106
PID 2324 wrote to memory of 4264	2324	cmd.exe	107
PID 2324 wrote to memory of 4264	2324	cmd.exe	107
PID 2324 wrote to memory of 4264	2324	cmd.exe	107
PID 2324 wrote to memory of 4180	2324	cmd.exe	108

C:\Users\Admin\AppData\Local\Temp\dashboard for all stealers (recomended for start)\paid dashboard.exe
"C:\Users\Admin\AppData\Local\Temp\dashboard for all stealers (recomended for start)\paid dashboard.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1032
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\7639.tmp\YellowSkull2.bat" "
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2324
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKEY_CURRENT_USER\Control Panel\Desktop" /v Wallpaper /t REG_SZ /d c:\yellowskull.bmp /f
    3⤵
    - Sets desktop wallpaper using registry
    - System Location Discovery: System Language Discovery
    PID:1000
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4684
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4144
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:956
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4020
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3624
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4544
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1180
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:5068
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4192
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3892
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4524
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2532
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4584
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3908
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:5072
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4320
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2364
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2168
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4264
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4180
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:5040
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1428
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4048
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4648
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4296
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1920
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2924
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4656
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4272
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3012
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4516
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1516
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2344
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4972
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2348
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /f /im explorer.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4084
- - C:\Windows\SysWOW64\reg.exe
    reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:3352
- - C:\Windows\SysWOW64\reg.exe
    reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System /v HideFastUserSwitching /t REG_DWORD /d 1 /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:220
- - C:\Windows\SysWOW64\reg.exe
    reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableChangePassword /t REG_DWORD /d 1 /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:4676
- - C:\Windows\SysWOW64\reg.exe
    reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableLockWorkstation /t REG_DWORD /d 1 /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:2476
- - C:\Windows\SysWOW64\reg.exe
    reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoLogoff /t REG_DWORD /d 1 /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:2252
- - C:\Windows\SysWOW64\reg.exe
    reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v ConsentPromptBehaviorAdmin /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:1348
- - C:\Windows\SysWOW64\reg.exe
    reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:3100
- - C:\Users\Admin\AppData\Local\Temp\7639.tmp\bg.exe
    bg.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5000
- - C:\Users\Admin\AppData\Local\Temp\7639.tmp\YSkullLock.exe
    YSkullLock.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2404
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "YellowSkull2 Special Program" /t REG_SZ /F /D "C:\YSkullMBRSetup.exe"
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:1976
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\7639.tmp\k.vbs"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4476

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x4f0 0x4c8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4336

C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
1⤵
- Modifies registry class
PID:5032

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

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Downloads

AppCache133682177986058573.txt

Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133682177986058573.txt
Size 75KB
SHA256 bf9f2ea1d49864a9c1dfe096dbcfd1e1f262e6223615bf8cc4ec786f19b37c28
MD5 263960904fcb1c46cc216bd860eb0240
SHA1 57b1f6a4dceb07eebc008d41f4b21c3aa1d554e4
SHA512 5b52d8b705cc043a7802d918500601e05f1e676752864daecdb7515ba2603e8840d2bb384a710fd85803a5cb72c80cc1e9655407627bd9e6715f905215f1ca8f
SSDEEP 384:i/v8/n5U/ymL/aNU/gT2/Hl/M1/h8r/hJ/Zk/Ey/eX/MA/NV/CzS/1o/Yd/eAe/z:vY7faRPV1D
MD5 SHA1 SHA512 SSDEEP

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YSkullLock.exe

Path C:\Users\Admin\AppData\Local\Temp\7639.tmp\YSkullLock.exe
Size 2.9MB
SHA256 3b2abd3773e4678100f197f53a886ec833fd2e26aa9a94d780a2d22befdf7d44
MD5 2191c3a14b53531e82726b17dd331cef
SHA1 9fdcc1ef73bbd08ac8f4cb3bdaf4c4ed26a99737
SHA512 93dc75ae619bcac6566c6e773c3628c2ef1326d988e592e59a1c8f9be304014a970caf40bf255a52b26fb37ca1d2625c8bf95b5dc749f378a0450a74aa3421f9
SSDEEP 1536:/9hZQLSuDqywUqfcIqVDY4aWFQ3RwjaxF86A62Oj5rc+ac+VCRDV:biDvjuCa7+VcB
MD5 SHA1 SHA512 SSDEEP

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YSkullMBRSetup.exe

Path C:\Users\Admin\AppData\Local\Temp\7639.tmp\YSkullMBRSetup.exe
Size 1.3MB
SHA256 f081c913488c3f22b62f906dac2a82a38d085ebe1d28701f0059dfdfbf1ccf42
MD5 220303eb72ebde4605116640fb719b26
SHA1 2021794facb35a7a23796e74835d8cf93882ddaf
SHA512 dc811be33365049b32c3a47de9b4f4e4f77be0a9dfd14bfcfce92a6f575cf9bbd4aa56fcc92a3d8bf7bd21354f6530f3cc50a1f185a5953861d3a73a3f1738fc
SSDEEP 24576:TVhHvKBiZ5/pYDIVhdL6I92XqMZa4JyuQ5O3h3JMtbc:7v5/sIwdHTMtbc
MD5 SHA1 SHA512 SSDEEP

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YellowSkull.bmp

Path C:\Users\Admin\AppData\Local\Temp\7639.tmp\YellowSkull.bmp
Size 2.9MB
SHA256 84c5dad2d4cec5b636c1fae6f1e1482ada9f62363dcf269b4a86f6070d5b50fc
MD5 11bcda64d254ad8dc591b41f8fceb04d
SHA1 66d9dea8a7c3d0bb6e9924a4c86f5eef98317752
SHA512 b26287ed0de799b95a4bb1f18eb92e3a24dc8250eb09c669112d4b60e7e362012c564d0959ddfe128bc00a63601d9132160cc93276cb72ebc0e0ab2fc2d837b2
SSDEEP 1536:chZQLSuDqywUqfcIqVDY4aWFQ3RwjaxF86A62Oj5rc+ac+VCR:qiDvjuCa7+Vc
MD5 SHA1 SHA512 SSDEEP

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YellowSkull2.bat

Path C:\Users\Admin\AppData\Local\Temp\7639.tmp\YellowSkull2.bat
Size 3KB
SHA256 dd8aa9f7955674a7a1b5b222d7c1809c583c705dae8bf476cdd42efcc0afabb5
MD5 4671d5895d88bc19645cab0fc7ca398a
SHA1 d6b1ccef99793b0dcd09156a6460027271cde082
SHA512 ea21a82ccbb1647bdd45890dadb1740a8dbb7d4cd7481a252545a6db2ce7fda1ce7c808b102bbd4dbd8764a6f824d6529044002f234bb5c255504f6b85ab926b
MD5 SHA1 SHA512

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bg.exe

Path C:\Users\Admin\AppData\Local\Temp\7639.tmp\bg.exe
Size 102KB
SHA256 b3670ec42931e2dea3e03053eda32240d8b6db15bf89d0c74e23e99ecb0aaf49
MD5 12cf508e9058e3e67cf8a736557c2749
SHA1 8448240c260ccef2d23854e749387b65e4b6668e
SHA512 7a837b5a89f29974b1e305e2082d5f7aee46bee3cef7e8a8b47a877d5bd6280c359318d6002c2c283aed13054a8ee590778e99e423a25f84f3037b0249c6403a
SSDEEP 768:K7qcybtwpM91ivG4al7fCwjfecgExpYc467yyxqOyWOjonu3yUyJCbfw287BDmay:N5iToUcHYGykqODu3yUyJCbfw287R1sF
MD5 SHA1 SHA512 SSDEEP

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bg.wav

Path C:\Users\Admin\AppData\Local\Temp\7639.tmp\bg.wav
Size 2.6MB
SHA256 94e1cecf8ed740ea45c87927de31005c3b2f9db261aae04fe56a81e337d1e8da
MD5 832b350b50a07906c630a2b8819fd209
SHA1 362d4d61df27a40f975e26b3d8ace1e8fac10f94
SHA512 cf267295d0248029e4a92d1052df1e24c93d3be79adb1efa9723c64e9c7bb52108a3bc194e772ff0e6dcb5b2208e9d7787a81a86e74ee11892571760e40abcbf
SSDEEP 49152:cS1K7sSPm6c2DF5eQqhZ9E8fIf6Kvl8ttzHAG+yFxEIiYSTM5TMes:hLSvcq5eZtfa6dttNxwnTM5TMes
MD5 SHA1 SHA512 SSDEEP

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k.vbs

Path C:\Users\Admin\AppData\Local\Temp\7639.tmp\k.vbs
Size 140B
SHA256 4c59cedcafe3f5a1025960b344107f7e18c98ca569d2e6c8aa3d685b20754089
MD5 126595a4087b9e1b9bac69aab147c97f
SHA1 ef079808ab8f7b762c413c5fa5844f4285f2848c
SHA512 41cc1badee06c16a0c65cbf7f38a420ca3c8e0ea459afd208b9b01cbeeef6724b8f2c04ecb41bec9d045492f9be0361612204db77eae7e1aeece8fe3761a7eb4
MD5 SHA1 SHA512

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memory/1032-0-0x0000000000400000-0x0000000000DD9000-memory.dmp

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memory/1032-40-0x0000000000400000-0x0000000000DD9000-memory.dmp

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memory/5000-42-0x0000000000400000-0x000000000041D000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads