badrabbit | 2a45e44be359fba4c85591e7b13d1ec772ed181adc41254d8b00d31b2d15878e

max time kernel
906s
max time network
909s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
08/06/2024, 08:50

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Reason

Machine shutdown

General

Target
Bad Rabit.exe
Size 431KB
Sample240608-krvyesae91
SHA256 630325cac09ac3fab908f903e3b00d0dadd5fdaa0875ed8496fcbb97a558d0da
MD5 fbbdc39af1139aebba4da004475e8839
SHA1 de5c8d858e6e41da715dca1c019df0bfb92d32c0
SHA512 74eca8c01de215b33d5ceea1fda3f3bef96b513f58a750dba04b0de36f7ef4f7846a6431d52879ca0d8641bfd504d4721a9a96fa2e18c6888fd67fa77686af87
SSDEEP 12288:BHNTywFAvN86pLbqWRKHZKfErrZJyZ0yqsGO3XR63:vT56NbqWRwZaEr3yt2O3XR63
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

badrabbit mimikatz evasion ransomware

Malware Config

Signatures

BadRabbit
Ransomware family discovered in late 2017, mainly targeting Russia and Ukraine.
ransomware badrabbit

Deletes NTFS Change Journal 2 TTPs 1 IoCs

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

pid	Process
2004	fsutil.exe

Mimikatz
mimikatz is an open source tool to dump credentials on Windows.
mimikatz

Clears Windows event logs 1 TTPs 4 IoCs

evasion ransomware

Indicator Removal

T1070

pid	Process
1496	wevtutil.exe
132	wevtutil.exe
1472	wevtutil.exe
1936	wevtutil.exe

mimikatz is an open source tool to dump credentials on Windows 1 IoCs

resource	yara_rule
behavioral3/files/0x000500000002a94f-20.dat	mimikatz

Blocklisted process makes network request 2 IoCs

flow	pid	Process
326	3876	rundll32.exe
372	3876	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
720	569C.tmp

Loads dropped DLL 1 IoCs

pid	Process
3876	rundll32.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File created	C:\Windows\cscc.dat	rundll32.exe
File created	C:\Windows\dispci.exe	rundll32.exe
File opened for modification	C:\Windows\569C.tmp	rundll32.exe
File created	C:\Windows\infpub.dat	Bad Rabit.exe
File opened for modification	C:\Windows\infpub.dat	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/Job

T1053

pid	Process
1816	schtasks.exe
1036	schtasks.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
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 = "4292114432"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292114432"	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 = "198"	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\DWM\ColorizationColor = "3288365268"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4290799360"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365268"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00	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\ColorizationGlassAttribute = "1"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3876	rundll32.exe
3876	rundll32.exe
3876	rundll32.exe
3876	rundll32.exe
720	569C.tmp
720	569C.tmp
720	569C.tmp
720	569C.tmp
720	569C.tmp
720	569C.tmp

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3876	rundll32.exe
Token: SeDebugPrivilege	3876	rundll32.exe
Token: SeTcbPrivilege	3876	rundll32.exe
Token: SeDebugPrivilege	720	569C.tmp
Token: SeSecurityPrivilege	132	wevtutil.exe
Token: SeBackupPrivilege	132	wevtutil.exe
Token: SeSecurityPrivilege	1472	wevtutil.exe
Token: SeBackupPrivilege	1472	wevtutil.exe
Token: SeSecurityPrivilege	1936	wevtutil.exe
Token: SeBackupPrivilege	1936	wevtutil.exe
Token: SeSecurityPrivilege	1496	wevtutil.exe
Token: SeBackupPrivilege	1496	wevtutil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3504	LogonUI.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 4924 wrote to memory of 3876	4924	Bad Rabit.exe	79
PID 4924 wrote to memory of 3876	4924	Bad Rabit.exe	79
PID 4924 wrote to memory of 3876	4924	Bad Rabit.exe	79
PID 3876 wrote to memory of 2784	3876	rundll32.exe	80
PID 3876 wrote to memory of 2784	3876	rundll32.exe	80
PID 3876 wrote to memory of 2784	3876	rundll32.exe	80
PID 2784 wrote to memory of 3476	2784	cmd.exe	82
PID 2784 wrote to memory of 3476	2784	cmd.exe	82
PID 2784 wrote to memory of 3476	2784	cmd.exe	82
PID 3876 wrote to memory of 4264	3876	rundll32.exe	83
PID 3876 wrote to memory of 4264	3876	rundll32.exe	83
PID 3876 wrote to memory of 4264	3876	rundll32.exe	83
PID 3876 wrote to memory of 1964	3876	rundll32.exe	85
PID 3876 wrote to memory of 1964	3876	rundll32.exe	85
PID 3876 wrote to memory of 1964	3876	rundll32.exe	85
PID 3876 wrote to memory of 720	3876	rundll32.exe	86
PID 3876 wrote to memory of 720	3876	rundll32.exe	86
PID 1964 wrote to memory of 1036	1964	cmd.exe	89
PID 1964 wrote to memory of 1036	1964	cmd.exe	89
PID 1964 wrote to memory of 1036	1964	cmd.exe	89
PID 4264 wrote to memory of 1816	4264	cmd.exe	90
PID 4264 wrote to memory of 1816	4264	cmd.exe	90
PID 4264 wrote to memory of 1816	4264	cmd.exe	90
PID 3876 wrote to memory of 8	3876	rundll32.exe	92
PID 3876 wrote to memory of 8	3876	rundll32.exe	92
PID 3876 wrote to memory of 8	3876	rundll32.exe	92
PID 8 wrote to memory of 132	8	cmd.exe	94
PID 8 wrote to memory of 132	8	cmd.exe	94
PID 8 wrote to memory of 132	8	cmd.exe	94
PID 8 wrote to memory of 1472	8	cmd.exe	95
PID 8 wrote to memory of 1472	8	cmd.exe	95
PID 8 wrote to memory of 1472	8	cmd.exe	95
PID 8 wrote to memory of 1936	8	cmd.exe	96
PID 8 wrote to memory of 1936	8	cmd.exe	96
PID 8 wrote to memory of 1936	8	cmd.exe	96
PID 8 wrote to memory of 1496	8	cmd.exe	97
PID 8 wrote to memory of 1496	8	cmd.exe	97
PID 8 wrote to memory of 1496	8	cmd.exe	97
PID 8 wrote to memory of 2004	8	cmd.exe	98
PID 8 wrote to memory of 2004	8	cmd.exe	98
PID 8 wrote to memory of 2004	8	cmd.exe	98
PID 3876 wrote to memory of 2080	3876	rundll32.exe	99
PID 3876 wrote to memory of 2080	3876	rundll32.exe	99
PID 3876 wrote to memory of 2080	3876	rundll32.exe	99

C:\Users\Admin\AppData\Local\Temp\Bad Rabit.exe
"C:\Users\Admin\AppData\Local\Temp\Bad Rabit.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4924
- C:\Windows\SysWOW64\rundll32.exe
  C:\Windows\system32\rundll32.exe C:\Windows\infpub.dat,#1 15
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3876
- - C:\Windows\SysWOW64\cmd.exe
    /c schtasks /Delete /F /TN rhaegal
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2784
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Delete /F /TN rhaegal
      4⤵
      PID:3476
- - 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 2231512642 && exit"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4264
  - - 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 2231512642 && exit"
      4⤵
      Creates scheduled task(s)
      PID:1816
- - 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 09:10:00
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1964
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Create /SC once /TN drogon /RU SYSTEM /TR "C:\Windows\system32\shutdown.exe /r /t 0 /f" /ST 09:10:00
      4⤵
      Creates scheduled task(s)
      PID:1036
- - C:\Windows\569C.tmp
    "C:\Windows\569C.tmp" \\.\pipe\{3957EEAA-6831-46C4-BF01-205E2815B051}
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:720
- - 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:8
  - - C:\Windows\SysWOW64\wevtutil.exe
      wevtutil cl Setup
      4⤵
      Clears Windows event logs
      Suspicious use of AdjustPrivilegeToken
      PID:132
  - - C:\Windows\SysWOW64\wevtutil.exe
      wevtutil cl System
      4⤵
      Clears Windows event logs
      Suspicious use of AdjustPrivilegeToken
      PID:1472
  - - C:\Windows\SysWOW64\wevtutil.exe
      wevtutil cl Security
      4⤵
      Clears Windows event logs
      Suspicious use of AdjustPrivilegeToken
      PID:1936
  - - C:\Windows\SysWOW64\wevtutil.exe
      wevtutil cl Application
      4⤵
      Clears Windows event logs
      Suspicious use of AdjustPrivilegeToken
      PID:1496
  - - C:\Windows\SysWOW64\fsutil.exe
      fsutil usn deletejournal /D C:
      4⤵
      Deletes NTFS Change Journal
      PID:2004
- - C:\Windows\SysWOW64\cmd.exe
    /c schtasks /Delete /F /TN drogon
    3⤵
    PID:2080

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa39ef855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:3504

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Indicator Removal

T1070

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Data Destruction

T1485

Inhibit System Recovery

T1490

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569C.tmp

Path C:\Windows\569C.tmp
Size 60KB
SHA256 301b905eb98d8d6bb559c04bbda26628a942b2c4107c07a02e8f753bdcfe347c
MD5 347ac3b6b791054de3e5720a7144a977
SHA1 413eba3973a15c1a6429d9f170f3e8287f98c21c
SHA512 9a399916bc681964af1e1061bc0a8e2926307642557539ad587ce6f9b5ef93bdf1820fe5d7b5ffe5f0bb38e5b4dc6add213ba04048c0c7c264646375fcd01787
SSDEEP 1536:QeRCKjey4TTGLeBYEUW1SIUDoCB449rHUV:KKjey4TTmeBZUGSIUDoCq49oV
MD5 SHA1 SHA512 SSDEEP

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infpub.dat

Path C:\Windows\infpub.dat
Size 401KB
SHA256 579fd8a0385482fb4c789561a30b09f25671e86422f40ef5cca2036b28f99648
MD5 1d724f95c61f1055f0d02c2154bbccd3
SHA1 79116fe99f2b421c52ef64097f0f39b815b20907
SHA512 f2d7b018d1516df1c97cfff5507957c75c6d9bf8e2ce52ae0052706f4ec62f13eba6d7be17e6ad2b693fdd58e1fd091c37f17bd2b948cdcd9b95b4ad428c0113
SSDEEP 12288:GtDjvhNTc/cq4RKZZKfArRuSA80m+/6sXRnfPGp:IjTc/cq4RUZaArbInfPGp
MD5 SHA1 SHA512 SSDEEP

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memory/3876-4-0x00000000029A0000-0x0000000002A08000-memory.dmp

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memory/3876-11-0x00000000029A0000-0x0000000002A08000-memory.dmp

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memory/3876-14-0x00000000029A0000-0x0000000002A08000-memory.dmp

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Resubmissions

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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