022728f678d8dcc6cba20147595ed4099e9c98be0582c0f67518d5664e3b8523

Resubmissions

03-03-2024 01:34

240303-by6ttsbe94 10

03-03-2024 01:31

240303-bxkj7sbe62 7

Analysis

max time kernel
44s
max time network
52s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
03-03-2024 01:34

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Reason

Machine shutdown

Report Analysis Logs

General

Target

Ransomware/7ev3n.exe
Size

315KB
MD5

9f8bc96c96d43ecb69f883388d228754
SHA1

61ed25a706afa2f6684bb4d64f69c5fb29d20953
SHA256

7d373ccb96d1dbb1856ef31afa87c2112a0c1795a796ab01cb154700288afec5
SHA512

550a891c1059f58aa983138caf65a7ea9c326cb1b94c15f3e7594128f6e9f1295b9c2dbc0925637dba7c94e938083fffc6a63dc7c2e5b1e247679931cce505c6
SSDEEP

6144:BswDdb2MemnBVlz0SoVbO4A6OA4Trl28TyT6llY1/I8cWJWlfTXv:BswRSslz0P1OdFXJlJ8buXv

Score

10^/10

evasion persistence trojan

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "C:\\Users\\Admin\\AppData\\Local\\system.exe"	reg.exe

UAC bypass 3 TTPs 1 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\EnableLUA = "0"	reg.exe

Executes dropped EXE 1 IoCs

pid	Process
772	system.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\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "C:\\Users\\Admin\\AppData\\Local\\system.exe"	reg.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2344	SCHTASKS.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	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\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "109"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	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\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\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	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\ColorizationGlassAttribute = "1"	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

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	4508	shutdown.exe
Token: SeRemoteShutdownPrivilege	4508	shutdown.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3240	LogonUI.exe

Suspicious use of WriteProcessMemory 57 IoCs

description	pid	Process	procid_target
PID 3160 wrote to memory of 772	3160	7ev3n.exe	87
PID 3160 wrote to memory of 772	3160	7ev3n.exe	87
PID 3160 wrote to memory of 772	3160	7ev3n.exe	87
PID 772 wrote to memory of 4656	772	system.exe	88
PID 772 wrote to memory of 4656	772	system.exe	88
PID 772 wrote to memory of 4656	772	system.exe	88
PID 772 wrote to memory of 2344	772	system.exe	90
PID 772 wrote to memory of 2344	772	system.exe	90
PID 772 wrote to memory of 2344	772	system.exe	90
PID 772 wrote to memory of 1304	772	system.exe	92
PID 772 wrote to memory of 1304	772	system.exe	92
PID 772 wrote to memory of 1304	772	system.exe	92
PID 772 wrote to memory of 2436	772	system.exe	93
PID 772 wrote to memory of 2436	772	system.exe	93
PID 772 wrote to memory of 2436	772	system.exe	93
PID 772 wrote to memory of 4796	772	system.exe	94
PID 772 wrote to memory of 4796	772	system.exe	94
PID 772 wrote to memory of 4796	772	system.exe	94
PID 772 wrote to memory of 4628	772	system.exe	95
PID 772 wrote to memory of 4628	772	system.exe	95
PID 772 wrote to memory of 4628	772	system.exe	95
PID 772 wrote to memory of 1140	772	system.exe	96
PID 772 wrote to memory of 1140	772	system.exe	96
PID 772 wrote to memory of 1140	772	system.exe	96
PID 772 wrote to memory of 368	772	system.exe	98
PID 772 wrote to memory of 368	772	system.exe	98
PID 772 wrote to memory of 368	772	system.exe	98
PID 2436 wrote to memory of 2476	2436	cmd.exe	105
PID 2436 wrote to memory of 2476	2436	cmd.exe	105
PID 2436 wrote to memory of 2476	2436	cmd.exe	105
PID 4628 wrote to memory of 4148	4628	cmd.exe	104
PID 4628 wrote to memory of 4148	4628	cmd.exe	104
PID 4628 wrote to memory of 4148	4628	cmd.exe	104
PID 4796 wrote to memory of 2448	4796	cmd.exe	106
PID 4796 wrote to memory of 2448	4796	cmd.exe	106
PID 4796 wrote to memory of 2448	4796	cmd.exe	106
PID 1304 wrote to memory of 1372	1304	cmd.exe	107
PID 1304 wrote to memory of 1372	1304	cmd.exe	107
PID 1304 wrote to memory of 1372	1304	cmd.exe	107
PID 1140 wrote to memory of 4712	1140	cmd.exe	108
PID 1140 wrote to memory of 4712	1140	cmd.exe	108
PID 1140 wrote to memory of 4712	1140	cmd.exe	108
PID 368 wrote to memory of 2080	368	cmd.exe	109
PID 368 wrote to memory of 2080	368	cmd.exe	109
PID 368 wrote to memory of 2080	368	cmd.exe	109
PID 772 wrote to memory of 3572	772	system.exe	111
PID 772 wrote to memory of 3572	772	system.exe	111
PID 772 wrote to memory of 3572	772	system.exe	111
PID 3572 wrote to memory of 3588	3572	cmd.exe	113
PID 3572 wrote to memory of 3588	3572	cmd.exe	113
PID 3572 wrote to memory of 3588	3572	cmd.exe	113
PID 772 wrote to memory of 4896	772	system.exe	114
PID 772 wrote to memory of 4896	772	system.exe	114
PID 772 wrote to memory of 4896	772	system.exe	114
PID 4896 wrote to memory of 4508	4896	cmd.exe	116
PID 4896 wrote to memory of 4508	4896	cmd.exe	116
PID 4896 wrote to memory of 4508	4896	cmd.exe	116

C:\Users\Admin\AppData\Local\Temp\Ransomware\7ev3n.exe
"C:\Users\Admin\AppData\Local\Temp\Ransomware\7ev3n.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3160
- C:\Users\Admin\AppData\Local\system.exe
  "C:\Users\Admin\AppData\Local\system.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:772
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\del.bat
    3⤵
    PID:4656
- - C:\Windows\SysWOW64\SCHTASKS.exe
    C:\Windows\System32\SCHTASKS.exe /create /SC ONLOGON /TN uac /TR "C:\Users\Admin\AppData\Local\bcd.bat" /RL HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2344
- - C:\windows\SysWOW64\cmd.exe
    C:\windows\system32\cmd.exe /c REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v "Shell" /t REG_SZ /d "C:\Users\Admin\AppData\Local\system.exe" /f /reg:64
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1304
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v "Shell" /t REG_SZ /d "C:\Users\Admin\AppData\Local\system.exe" /f /reg:64
      4⤵
      Modifies WinLogon for persistence
      PID:1372
- - C:\windows\SysWOW64\cmd.exe
    C:\windows\system32\cmd.exe /c REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "System" /t REG_SZ /d "C:\Users\Admin\AppData\Local\system.exe" /f /reg:64
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2436
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "System" /t REG_SZ /d "C:\Users\Admin\AppData\Local\system.exe" /f /reg:64
      4⤵
      Adds Run key to start application
      PID:2476
- - C:\windows\SysWOW64\cmd.exe
    C:\windows\system32\cmd.exe /c REG ADD "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout" /v "Scancode Map" /t REG_BINARY /d "00000000000000001700000000003800000038e000005be000005ce00000360000001d0000001de000000f000000010000001c0000003e0000003b00000044000000450000003d0000005de000000000" /f /reg:64
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4796
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout" /v "Scancode Map" /t REG_BINARY /d "00000000000000001700000000003800000038e000005be000005ce00000360000001d0000001de000000f000000010000001c0000003e0000003b00000044000000450000003d0000005de000000000" /f /reg:64
      4⤵
      PID:2448
- - C:\windows\SysWOW64\cmd.exe
    C:\windows\system32\cmd.exe /c REG ADD "HKEY_CURRENT_USER\Control Panel\Accessibility\StickyKeys" /v "Flags" /t REG_SZ /d 506 /f /reg:64
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4628
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKEY_CURRENT_USER\Control Panel\Accessibility\StickyKeys" /v "Flags" /t REG_SZ /d 506 /f /reg:64
      4⤵
      PID:4148
- - C:\windows\SysWOW64\cmd.exe
    C:\windows\system32\cmd.exe /c REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion" /v "rgd_bcd_condition" /t REG_SZ /d 1 /f /reg:64
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1140
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion" /v "rgd_bcd_condition" /t REG_SZ /d 1 /f /reg:64
      4⤵
      PID:4712
- - C:\windows\SysWOW64\cmd.exe
    C:\windows\system32\cmd.exe /c REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v "EnableLUA" /t REG_DWORD /d 0 /f /reg:64
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:368
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v "EnableLUA" /t REG_DWORD /d 0 /f /reg:64
      4⤵
      UAC bypass
      PID:2080
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion" /v "crypted" /t REG_SZ /d 1 /f /reg:64
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3572
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion" /v "crypted" /t REG_SZ /d 1 /f /reg:64
      4⤵
      PID:3588
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c shutdown -r -t 10 -f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4896
  - - C:\Windows\SysWOW64\shutdown.exe
      shutdown -r -t 10 -f
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:4508

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa39a1055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:3240

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

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

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\del.bat

Filesize
76B

MD5
2623d4a3f9735b4a8298ad5050eb73ef

SHA1
3dcd1491a378acd63f725bd427ecb9810dc3cea2

SHA256
01ddb9a534a1519c377c6951557207284a9a941870951797b2dfa5ed86a85709

SHA512
aff6ca24a072b2219dafaa751a011cf41b5e8f638438e79d4e1852ff33ce7dbfa87e9e36b867866b2b8bd5ae30f0267d0ce2827caea21ec73a690ae9b4e329e8

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C:\Users\Admin\AppData\Local\system.exe

Filesize
315KB

MD5
48366d3882cc2977b8875a8b858bc6ff

SHA1
65385b174612f30b090ee20074f656feb225478a

SHA256
2a40346337677722c5d5edbc0a900f4c71e8f8fc3f74c311265719fdd02d4c09

SHA512
e7a3dc85a288d4aaddcbb1b001eed71ecf91f341de93f7a77eab7e72efff8fbe77f7a3b3a1ba607ab7834004fc69da3c7e5db919074d14f02256d1d9365377dd

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Resubmissions

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads