c6a916c33096cd488ca57c28863c433cf5279128aa50ea156761bab6444f4937

Resubmissions

24/02/2024, 15:44

240224-s6pzqafh5310

24/02/2024, 14:06

240224-relmjsdh4510

24/02/2024, 11:48

240224-nyvssabe4w3

Analysis

max time kernel
58s
max time network
63s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
24/02/2024, 14:06

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Reason

Machine shutdown

General

Target
Ransomware.7ev3n.exe
Size 315KB
Sample240224-relmjsdh45
SHA256 7d373ccb96d1dbb1856ef31afa87c2112a0c1795a796ab01cb154700288afec5
MD5 9f8bc96c96d43ecb69f883388d228754
SHA1 61ed25a706afa2f6684bb4d64f69c5fb29d20953
SHA512 550a891c1059f58aa983138caf65a7ea9c326cb1b94c15f3e7594128f6e9f1295b9c2dbc0925637dba7c94e938083fffc6a63dc7c2e5b1e247679931cce505c6
SSDEEP 6144:BswDdb2MemnBVlz0SoVbO4A6OA4Trl28TyT6llY1/I8cWJWlfTXv:BswRSslz0P1OdFXJlJ8buXv
MD5 SHA1 SHA512 SSDEEP

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
2208	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
2596	SCHTASKS.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
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\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	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\DWM\EnableWindowColorization = "38"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3048	shutdown.exe
Token: SeRemoteShutdownPrivilege	3048	shutdown.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3552	LogonUI.exe

Suspicious use of WriteProcessMemory 57 IoCs

description	pid	Process	procid_target
PID 3916 wrote to memory of 2208	3916	Ransomware.7ev3n.exe	92
PID 3916 wrote to memory of 2208	3916	Ransomware.7ev3n.exe	92
PID 3916 wrote to memory of 2208	3916	Ransomware.7ev3n.exe	92
PID 2208 wrote to memory of 3028	2208	system.exe	93
PID 2208 wrote to memory of 3028	2208	system.exe	93
PID 2208 wrote to memory of 3028	2208	system.exe	93
PID 2208 wrote to memory of 2596	2208	system.exe	95
PID 2208 wrote to memory of 2596	2208	system.exe	95
PID 2208 wrote to memory of 2596	2208	system.exe	95
PID 2208 wrote to memory of 3976	2208	system.exe	97
PID 2208 wrote to memory of 3976	2208	system.exe	97
PID 2208 wrote to memory of 3976	2208	system.exe	97
PID 2208 wrote to memory of 3936	2208	system.exe	98
PID 2208 wrote to memory of 3936	2208	system.exe	98
PID 2208 wrote to memory of 3936	2208	system.exe	98
PID 2208 wrote to memory of 4720	2208	system.exe	103
PID 2208 wrote to memory of 4720	2208	system.exe	103
PID 2208 wrote to memory of 4720	2208	system.exe	103
PID 2208 wrote to memory of 3992	2208	system.exe	102
PID 2208 wrote to memory of 3992	2208	system.exe	102
PID 2208 wrote to memory of 3992	2208	system.exe	102
PID 2208 wrote to memory of 3208	2208	system.exe	101
PID 2208 wrote to memory of 3208	2208	system.exe	101
PID 2208 wrote to memory of 3208	2208	system.exe	101
PID 2208 wrote to memory of 4000	2208	system.exe	100
PID 2208 wrote to memory of 4000	2208	system.exe	100
PID 2208 wrote to memory of 4000	2208	system.exe	100
PID 3936 wrote to memory of 1420	3936	cmd.exe	109
PID 3936 wrote to memory of 1420	3936	cmd.exe	109
PID 3936 wrote to memory of 1420	3936	cmd.exe	109
PID 3992 wrote to memory of 3948	3992	cmd.exe	111
PID 3992 wrote to memory of 3948	3992	cmd.exe	111
PID 3992 wrote to memory of 3948	3992	cmd.exe	111
PID 4000 wrote to memory of 440	4000	cmd.exe	110
PID 4000 wrote to memory of 440	4000	cmd.exe	110
PID 4000 wrote to memory of 440	4000	cmd.exe	110
PID 3208 wrote to memory of 3308	3208	cmd.exe	114
PID 3208 wrote to memory of 3308	3208	cmd.exe	114
PID 3208 wrote to memory of 3308	3208	cmd.exe	114
PID 4720 wrote to memory of 2264	4720	cmd.exe	112
PID 4720 wrote to memory of 2264	4720	cmd.exe	112
PID 4720 wrote to memory of 2264	4720	cmd.exe	112
PID 3976 wrote to memory of 3568	3976	cmd.exe	113
PID 3976 wrote to memory of 3568	3976	cmd.exe	113
PID 3976 wrote to memory of 3568	3976	cmd.exe	113
PID 2208 wrote to memory of 2944	2208	system.exe	116
PID 2208 wrote to memory of 2944	2208	system.exe	116
PID 2208 wrote to memory of 2944	2208	system.exe	116
PID 2944 wrote to memory of 2812	2944	cmd.exe	118
PID 2944 wrote to memory of 2812	2944	cmd.exe	118
PID 2944 wrote to memory of 2812	2944	cmd.exe	118
PID 2208 wrote to memory of 3832	2208	system.exe	119
PID 2208 wrote to memory of 3832	2208	system.exe	119
PID 2208 wrote to memory of 3832	2208	system.exe	119
PID 3832 wrote to memory of 3048	3832	cmd.exe	121
PID 3832 wrote to memory of 3048	3832	cmd.exe	121
PID 3832 wrote to memory of 3048	3832	cmd.exe	121

C:\Users\Admin\AppData\Local\Temp\Ransomware.7ev3n.exe
"C:\Users\Admin\AppData\Local\Temp\Ransomware.7ev3n.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3916
- C:\Users\Admin\AppData\Local\system.exe
  "C:\Users\Admin\AppData\Local\system.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2208
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\del.bat
    3⤵
    PID:3028
- - 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:2596
- - 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:3976
  - - 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:3568
- - 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:3936
  - - 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:1420
- - 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:4000
  - - 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:440
- - 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:3208
  - - 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:3308
- - 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:3992
  - - 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:3948
- - 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:4720
  - - 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:2264
- - 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:2944
  - - 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:2812
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c shutdown -r -t 10 -f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3832
  - - C:\Windows\SysWOW64\shutdown.exe
      shutdown -r -t 10 -f
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3048

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa39bf055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:3552

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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del.bat

Path C:\Users\Admin\AppData\Local\del.bat
Size 76B
SHA256 7f35dc86053a85c2ffe7ef385ace63105cdff5fd1960be4169a72b66dcb9c2cb
MD5 bd6cd262cc5cccb49b23151fd6ac9d83
SHA1 cbb450016597875cd6616e62ec8f9a1acd4abb9a
SHA512 6bfbb77e4050c65a74c97aefebd80bab1b61e9cad3332aa5dbe42ea8bd2c171012a9426e98e1b85e3f9ab0f48ef6501d44ef1b9318def2c994f4f26433b3ad09
MD5 SHA1 SHA512

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system.exe

Path C:\Users\Admin\AppData\Local\system.exe
Size 315KB
SHA256 a2e9bf7f963c38c20832248ae78c54dee856b5ad62ecd94d17ab4eedd12c45d2
MD5 6dc86373a8296ef0cddd826777467a8c
SHA1 89d66cc866e781250467c354d2a97ac3933ffcea
SHA512 f0c4597e7c214e993b2f057daaaeae3f70cd5bdac609220773c979aa72cbfd9a1f597542ad3683a53726693df4ba1cbc8855a566b98e497ccb9b975d1149c046
SSDEEP 6144:BswDdb2MemnBVlz0SoVbO4A6OA4Trl28TyT6llY1/I8cWJWlfTXvz:BswRSslz0P1OdFXJlJ8buXvz
MD5 SHA1 SHA512 SSDEEP

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Resubmissions

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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