badrabbit | f1bbcc5c678d174d858ae089f4494e3ea8bcfc418098d61804a15e437f08aff7

Target

[email protected]
Size

116KB
MD5

41789c704a0eecfdd0048b4b4193e752
SHA1

fb1e8385691fa3293b7cbfb9b2656cf09f20e722
SHA256

b2dcfdf9e7b09f2aa5004668370e77982963ace820e7285b2e264a294441da23
SHA512

76391ac85fdc3be75441fcd6e19bed08b807d3946c7281c647f16a3be5388f7be307e6323fac8502430a4a6d800d52a88709592a49011ecc89de4f19102435ea

Score

10^/10

badrabbit bootkit evasion persistence ransomware

Malware Config

Signatures

BadRabbit
Ransomware family discovered in late 2017, mainly targeting Russia and Ukraine.
ransomware badrabbit
Deletes NTFS Change Journal 2 TTPs
The USN change journal is a persistent log of all changes made to local files used by Windows Server systems.
ransomware

Inhibit System Recovery
T1490

Data Destruction
T1485

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

[email protected]

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "C:\\Users\\Admin\\AppData\\Local\\Temp\\[email protected]"	[email protected]

Clears Windows event logs 1 TTPs
evasion ransomware

Indicator Removal on Host
T1070

Executes dropped EXE 1 IoCs

Processes:

907F.tmp

pid	Process
1868	907F.tmp

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

Modifies extensions of user files 2 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

rundll32.exe

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\DismountResize.tiff	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\UnlockLock.tiff	rundll32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

[email protected]

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	[email protected]
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\system = "C:\\Users\\Admin\\AppData\\Local\\Temp\\[email protected]"	[email protected]

Drops file in Windows directory 4 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
File opened for modification	C:\Windows\907F.tmp	rundll32.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task

T1053

Processes:

schtasks.exeschtasks.exe

pid	Process
4352	schtasks.exe
4436	schtasks.exe

Kills process with taskkill 1 IoCs

evasion

Processes:

taskkill.exe

pid	Process
3364	taskkill.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	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\CurrentVersion\Explorer\Accent	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\AccentColor = "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\ColorizationAfterglowBalance = "10"	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\EnableWindowColorization = "1"	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\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

rundll32.exe907F.tmp

pid	Process
3036	rundll32.exe
3036	rundll32.exe
3036	rundll32.exe
3036	rundll32.exe
1868	907F.tmp
1868	907F.tmp
1868	907F.tmp
1868	907F.tmp
1868	907F.tmp
1868	907F.tmp
3036	rundll32.exe
3036	rundll32.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

Processes:

taskkill.exerundll32.exe907F.tmpwevtutil.exewevtutil.exewevtutil.exewevtutil.exe

description	pid	Process
Token: SeDebugPrivilege	3364	taskkill.exe
Token: SeShutdownPrivilege	3036	rundll32.exe
Token: SeDebugPrivilege	3036	rundll32.exe
Token: SeTcbPrivilege	3036	rundll32.exe
Token: SeDebugPrivilege	1868	907F.tmp
Token: SeSecurityPrivilege	2848	wevtutil.exe
Token: SeBackupPrivilege	2848	wevtutil.exe
Token: SeSecurityPrivilege	2128	wevtutil.exe
Token: SeBackupPrivilege	2128	wevtutil.exe
Token: SeSecurityPrivilege	3664	wevtutil.exe
Token: SeBackupPrivilege	3664	wevtutil.exe
Token: SeSecurityPrivilege	1724	wevtutil.exe
Token: SeBackupPrivilege	1724	wevtutil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LogonUI.exe

pid	Process
200	LogonUI.exe

Suspicious use of WriteProcessMemory 50 IoCs

Processes:

[email protected]rundll32.exerundll32.execmd.execmd.execmd.execmd.execmd.exe

description	pid	Process	procid_target
PID 4704 wrote to memory of 3364	4704	[email protected]	75
PID 4704 wrote to memory of 3364	4704	[email protected]	75
PID 4704 wrote to memory of 3364	4704	[email protected]	75
PID 4260 wrote to memory of 3036	4260	rundll32.exe	81
PID 4260 wrote to memory of 3036	4260	rundll32.exe	81
PID 4260 wrote to memory of 3036	4260	rundll32.exe	81
PID 3036 wrote to memory of 500	3036	rundll32.exe	82
PID 3036 wrote to memory of 500	3036	rundll32.exe	82
PID 3036 wrote to memory of 500	3036	rundll32.exe	82
PID 500 wrote to memory of 4356	500	cmd.exe	84
PID 500 wrote to memory of 4356	500	cmd.exe	84
PID 500 wrote to memory of 4356	500	cmd.exe	84
PID 3036 wrote to memory of 4044	3036	rundll32.exe	85
PID 3036 wrote to memory of 4044	3036	rundll32.exe	85
PID 3036 wrote to memory of 4044	3036	rundll32.exe	85
PID 4044 wrote to memory of 4352	4044	cmd.exe	87
PID 4044 wrote to memory of 4352	4044	cmd.exe	87
PID 4044 wrote to memory of 4352	4044	cmd.exe	87
PID 3036 wrote to memory of 3904	3036	rundll32.exe	88
PID 3036 wrote to memory of 3904	3036	rundll32.exe	88
PID 3036 wrote to memory of 3904	3036	rundll32.exe	88
PID 3036 wrote to memory of 1868	3036	rundll32.exe	89
PID 3036 wrote to memory of 1868	3036	rundll32.exe	89
PID 3904 wrote to memory of 4436	3904	cmd.exe	92
PID 3904 wrote to memory of 4436	3904	cmd.exe	92
PID 3904 wrote to memory of 4436	3904	cmd.exe	92
PID 3036 wrote to memory of 2420	3036	rundll32.exe	93
PID 3036 wrote to memory of 2420	3036	rundll32.exe	93
PID 3036 wrote to memory of 2420	3036	rundll32.exe	93
PID 2420 wrote to memory of 2848	2420	cmd.exe	95
PID 2420 wrote to memory of 2848	2420	cmd.exe	95
PID 2420 wrote to memory of 2848	2420	cmd.exe	95
PID 2420 wrote to memory of 2128	2420	cmd.exe	96
PID 2420 wrote to memory of 2128	2420	cmd.exe	96
PID 2420 wrote to memory of 2128	2420	cmd.exe	96
PID 2420 wrote to memory of 3664	2420	cmd.exe	97
PID 2420 wrote to memory of 3664	2420	cmd.exe	97
PID 2420 wrote to memory of 3664	2420	cmd.exe	97
PID 2420 wrote to memory of 1724	2420	cmd.exe	98
PID 2420 wrote to memory of 1724	2420	cmd.exe	98
PID 2420 wrote to memory of 1724	2420	cmd.exe	98
PID 2420 wrote to memory of 2808	2420	cmd.exe	99
PID 2420 wrote to memory of 2808	2420	cmd.exe	99
PID 2420 wrote to memory of 2808	2420	cmd.exe	99
PID 3036 wrote to memory of 4676	3036	rundll32.exe	100
PID 3036 wrote to memory of 4676	3036	rundll32.exe	100
PID 3036 wrote to memory of 4676	3036	rundll32.exe	100
PID 4676 wrote to memory of 4600	4676	cmd.exe	103
PID 4676 wrote to memory of 4600	4676	cmd.exe	103
PID 4676 wrote to memory of 4600	4676	cmd.exe	103

C:\Users\Admin\AppData\Local\Temp\[email protected]
"C:\Users\Admin\AppData\Local\Temp\[email protected]"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4704
- C:\Windows\SysWOW64\taskkill.exe
  taskkill /F /IM explorer.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:3364

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\infpub.dat",#2 15
1⤵
- Suspicious use of WriteProcessMemory
PID:4260
- C:\Windows\SysWOW64\rundll32.exe
  C:\Windows\system32\rundll32.exe C:\Windows\infpub.dat,#1 15
  2⤵
  - Modifies extensions of user files
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3036
- - C:\Windows\SysWOW64\cmd.exe
    /c schtasks /Delete /F /TN rhaegal
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:500
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Delete /F /TN rhaegal
      4⤵
      PID:4356
- - C:\Windows\SysWOW64\cmd.exe
    /c schtasks /Create /RU SYSTEM /SC ONSTART /TN rhaegal /TR "C:\Windows\system32\cmd.exe /C Start \"\" \"C:\Windows\dispci.exe\" -id 3372482145 && exit"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4044
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Create /RU SYSTEM /SC ONSTART /TN rhaegal /TR "C:\Windows\system32\cmd.exe /C Start \"\" \"C:\Windows\dispci.exe\" -id 3372482145 && exit"
      4⤵
      Creates scheduled task(s)
      PID:4352
- - C:\Windows\SysWOW64\cmd.exe
    /c schtasks /Create /SC once /TN drogon /RU SYSTEM /TR "C:\Windows\system32\shutdown.exe /r /t 0 /f" /ST 07:02:00
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3904
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Create /SC once /TN drogon /RU SYSTEM /TR "C:\Windows\system32\shutdown.exe /r /t 0 /f" /ST 07:02:00
      4⤵
      Creates scheduled task(s)
      PID:4436
- - C:\Windows\907F.tmp
    "C:\Windows\907F.tmp" \\.\pipe\{221083ED-B60A-437D-971C-221A3F961FDB}
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1868
- - C:\Windows\SysWOW64\cmd.exe
    /c wevtutil cl Setup & wevtutil cl System & wevtutil cl Security & wevtutil cl Application & fsutil usn deletejournal /D C:
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2420
  - - C:\Windows\SysWOW64\wevtutil.exe
      wevtutil cl Setup
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2848
  - - C:\Windows\SysWOW64\wevtutil.exe
      wevtutil cl System
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2128
  - - C:\Windows\SysWOW64\wevtutil.exe
      wevtutil cl Security
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3664
  - - C:\Windows\SysWOW64\wevtutil.exe
      wevtutil cl Application
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1724
  - - C:\Windows\SysWOW64\fsutil.exe
      fsutil usn deletejournal /D C:
      4⤵
      PID:2808
- - C:\Windows\SysWOW64\cmd.exe
    /c schtasks /Delete /F /TN drogon
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4676
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Delete /F /TN drogon
      4⤵
      PID:4600

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3ad2855 /state1:0x41c64e6d
1⤵
- Modifies WinLogon to allow AutoLogon
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:200

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Winlogon Helper DLL

T1004

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Indicator Removal on Host

T1070

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Data Destruction

T1485

Inhibit System Recovery

T1490

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Downloads

C:\Windows\907F.tmp

MD5
347ac3b6b791054de3e5720a7144a977

SHA1
413eba3973a15c1a6429d9f170f3e8287f98c21c

SHA256
301b905eb98d8d6bb559c04bbda26628a942b2c4107c07a02e8f753bdcfe347c

SHA512
9a399916bc681964af1e1061bc0a8e2926307642557539ad587ce6f9b5ef93bdf1820fe5d7b5ffe5f0bb38e5b4dc6add213ba04048c0c7c264646375fcd01787

Download Submit
C:\Windows\907F.tmp

MD5
347ac3b6b791054de3e5720a7144a977

SHA1
413eba3973a15c1a6429d9f170f3e8287f98c21c

SHA256
301b905eb98d8d6bb559c04bbda26628a942b2c4107c07a02e8f753bdcfe347c

SHA512
9a399916bc681964af1e1061bc0a8e2926307642557539ad587ce6f9b5ef93bdf1820fe5d7b5ffe5f0bb38e5b4dc6add213ba04048c0c7c264646375fcd01787

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memory/500-3-0x0000000000000000-mapping.dmp

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memory/1724-16-0x0000000000000000-mapping.dmp

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memory/1868-8-0x0000000000000000-mapping.dmp

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memory/2128-14-0x0000000000000000-mapping.dmp

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memory/2420-12-0x0000000000000000-mapping.dmp

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memory/2808-17-0x0000000000000000-mapping.dmp

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memory/2848-13-0x0000000000000000-mapping.dmp

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memory/3036-1-0x0000000000000000-mapping.dmp

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memory/3036-2-0x0000000003AB0000-0x0000000003B18000-memory.dmp

Filesize
416KB

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memory/3364-0-0x0000000000000000-mapping.dmp

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memory/3664-15-0x0000000000000000-mapping.dmp

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memory/3904-7-0x0000000000000000-mapping.dmp

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memory/4044-5-0x0000000000000000-mapping.dmp

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memory/4352-6-0x0000000000000000-mapping.dmp

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memory/4356-4-0x0000000000000000-mapping.dmp

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memory/4436-11-0x0000000000000000-mapping.dmp

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memory/4600-19-0x0000000000000000-mapping.dmp

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memory/4676-18-0x0000000000000000-mapping.dmp

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Resubmissions

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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