badrabbit | f1bbcc5c678d174d858ae089f4494e3ea8bcfc418098d61804a15e437f08aff7

Target

Endermanch@HMBlocker.exe
Size

48KB
MD5

21943d72b0f4c2b42f242ac2d3de784c
SHA1

c887b9d92c026a69217ca550568909609eec1c39
SHA256

2d047b0a46be4da59d375f71cfbd578ce1fbf77955d0bb149f6be5b9e4552180
SHA512

04c9fa8358944d01b5fd0b6d5da2669df4c54fe79c58e7987c16bea56c114394173b6e8a6ac54cd4acd081fcbc66103ea6514c616363ba8d212db13b301034d8

Score

10^/10

badrabbit bootkit persistence ransomware

Malware Config

Signatures

BadRabbit
Ransomware family discovered in late 2017, mainly targeting Russia and Ukraine.
ransomware badrabbit
Modifies WinLogon to allow AutoLogon 2 TTPs 1 IoCs
Enables rebooting of the machine without requiring login credentials.
ransomware bootkit

Winlogon Helper DLL
T1004

Modify Registry
T1112

Processes:

LogonUI.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\AutoLogonChecked LogonUI.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\AutoLogonChecked	LogonUI.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exereg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\2503326475 = "C:\\Users\\Admin\\2503326475\\2503326475.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\2503326475_del = "cmd /c del \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Endermanch@HMBlocker.exe\""	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe

Drops file in Windows directory 3 IoCs

Processes:

rundll32.exe

description	ioc	process
File opened for modification	C:\Windows\infpub.dat	rundll32.exe
File created	C:\Windows\cscc.dat	rundll32.exe
File created	C:\Windows\dispci.exe	rundll32.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

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\ColorizationBlurBalance = "1"	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
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\ColorizationAfterglowBalance = "10"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	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\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	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 = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

wlrmdr.exerundll32.exe

pid process

2380 wlrmdr.exe
2380 wlrmdr.exe
2380 wlrmdr.exe
4040 rundll32.exe
4040 rundll32.exe
4040 rundll32.exe
4040 rundll32.exe

pid	process
2380	wlrmdr.exe
2380	wlrmdr.exe
2380	wlrmdr.exe
4040	rundll32.exe
4040	rundll32.exe
4040	rundll32.exe
4040	rundll32.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

shutdown.exerundll32.exe

description	pid	process
Token: SeShutdownPrivilege	1920	shutdown.exe
Token: SeRemoteShutdownPrivilege	1920	shutdown.exe
Token: SeShutdownPrivilege	4040	rundll32.exe
Token: SeDebugPrivilege	4040	rundll32.exe
Token: SeTcbPrivilege	4040	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

wlrmdr.exeLogonUI.exe

pid process

2380 wlrmdr.exe
2140 LogonUI.exe

pid	process
2380	wlrmdr.exe
2140	LogonUI.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

Endermanch@HMBlocker.execmd.execmd.exerundll32.exerundll32.execmd.exe

description	pid	process	target process
PID 3884 wrote to memory of 1920	3884	Endermanch@HMBlocker.exe	shutdown.exe
PID 3884 wrote to memory of 1920	3884	Endermanch@HMBlocker.exe	shutdown.exe
PID 3884 wrote to memory of 1920	3884	Endermanch@HMBlocker.exe	shutdown.exe
PID 3884 wrote to memory of 2060	3884	Endermanch@HMBlocker.exe	cmd.exe
PID 3884 wrote to memory of 2060	3884	Endermanch@HMBlocker.exe	cmd.exe
PID 3884 wrote to memory of 2060	3884	Endermanch@HMBlocker.exe	cmd.exe
PID 3884 wrote to memory of 2440	3884	Endermanch@HMBlocker.exe	cmd.exe
PID 3884 wrote to memory of 2440	3884	Endermanch@HMBlocker.exe	cmd.exe
PID 3884 wrote to memory of 2440	3884	Endermanch@HMBlocker.exe	cmd.exe
PID 2060 wrote to memory of 2584	2060	cmd.exe	reg.exe
PID 2060 wrote to memory of 2584	2060	cmd.exe	reg.exe
PID 2060 wrote to memory of 2584	2060	cmd.exe	reg.exe
PID 2440 wrote to memory of 3164	2440	cmd.exe	reg.exe
PID 2440 wrote to memory of 3164	2440	cmd.exe	reg.exe
PID 2440 wrote to memory of 3164	2440	cmd.exe	reg.exe
PID 3948 wrote to memory of 4040	3948	rundll32.exe	rundll32.exe
PID 3948 wrote to memory of 4040	3948	rundll32.exe	rundll32.exe
PID 3948 wrote to memory of 4040	3948	rundll32.exe	rundll32.exe
PID 4040 wrote to memory of 3664	4040	rundll32.exe	cmd.exe
PID 4040 wrote to memory of 3664	4040	rundll32.exe	cmd.exe
PID 4040 wrote to memory of 3664	4040	rundll32.exe	cmd.exe
PID 3664 wrote to memory of 3508	3664	cmd.exe	schtasks.exe
PID 3664 wrote to memory of 3508	3664	cmd.exe	schtasks.exe
PID 3664 wrote to memory of 3508	3664	cmd.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\Endermanch@HMBlocker.exe
"C:\Users\Admin\AppData\Local\Temp\Endermanch@HMBlocker.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3884

C:\Windows\SysWOW64\shutdown.exe
"C:\Windows\System32\shutdown.exe" /r /t 6 /f
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1920

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v 2503326475 /t REG_SZ /d "C:\Users\Admin\2503326475\2503326475.exe" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:2060

C:\Windows\SysWOW64\reg.exe
REG ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v 2503326475 /t REG_SZ /d "C:\Users\Admin\2503326475\2503326475.exe" /f
3⤵
- Adds Run key to start application
PID:2584

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce /v 2503326475_del /t REG_SZ /d "cmd /c del \"C:\Users\Admin\AppData\Local\Temp\Endermanch@HMBlocker.exe\"" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:2440

C:\Windows\SysWOW64\reg.exe
REG ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce /v 2503326475_del /t REG_SZ /d "cmd /c del \"C:\Users\Admin\AppData\Local\Temp\Endermanch@HMBlocker.exe\"" /f
3⤵
- Adds Run key to start application
PID:3164

C:\Windows\system32\wlrmdr.exe
-s -1 -f 2 -t You're about to be signed out -m Windows will shut down in less than a minute. -a 3
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:2380

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3ad1055 /state1:0x41c64e6d
1⤵
- Modifies WinLogon to allow AutoLogon
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:2140

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\infpub.dat",#2 15
1⤵
- Suspicious use of WriteProcessMemory
PID:3948

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\system32\rundll32.exe C:\Windows\infpub.dat,#1 15
2⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4040

C:\Windows\SysWOW64\cmd.exe
/c schtasks /Delete /F /TN rhaegal
3⤵
- Suspicious use of WriteProcessMemory
PID:3664

C:\Windows\SysWOW64\schtasks.exe
schtasks /Delete /F /TN rhaegal
4⤵
PID:3508

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1920-3-0x0000000000000000-mapping.dmp

Download
memory/2060-4-0x0000000000000000-mapping.dmp

Download
memory/2440-5-0x0000000000000000-mapping.dmp

Download
memory/2584-6-0x0000000000000000-mapping.dmp

Download
memory/3164-7-0x0000000000000000-mapping.dmp

Download
memory/3508-11-0x0000000000000000-mapping.dmp

Download
memory/3664-10-0x0000000000000000-mapping.dmp

Download
memory/3884-0-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/3884-1-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/3884-2-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/4040-8-0x0000000000000000-mapping.dmp

Download
memory/4040-9-0x0000000002820000-0x0000000002888000-memory.dmp

Filesize
416KB

Download

Resubmissions

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads