badrabbit | 2a45e44be359fba4c85591e7b13d1ec772ed181adc41254d8b00d31b2d15878e

max time kernel
149s
max time network
154s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
25-04-2024 21:16

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General

Target

Bad Rabit.exe
Size

431KB
MD5

fbbdc39af1139aebba4da004475e8839
SHA1

de5c8d858e6e41da715dca1c019df0bfb92d32c0
SHA256

630325cac09ac3fab908f903e3b00d0dadd5fdaa0875ed8496fcbb97a558d0da
SHA512

74eca8c01de215b33d5ceea1fda3f3bef96b513f58a750dba04b0de36f7ef4f7846a6431d52879ca0d8641bfd504d4721a9a96fa2e18c6888fd67fa77686af87
SSDEEP

12288:BHNTywFAvN86pLbqWRKHZKfErrZJyZ0yqsGO3XR63:vT56NbqWRwZaEr3yt2O3XR63

Score

10^/10

badrabbit mimikatz ransomware

Malware Config

Signatures

BadRabbit
Ransomware family discovered in late 2017, mainly targeting Russia and Ukraine.
ransomware badrabbit
Mimikatz
mimikatz is an open source tool to dump credentials on Windows.
mimikatz

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

Processes:

resource	yara_rule
behavioral3/files/0x000600000002a979-22.dat	mimikatz

Executes dropped EXE 1 IoCs

Processes:

4B51.tmp

pid	Process
4832	4B51.tmp

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid	Process
1328	rundll32.exe

Drops file in Windows directory 5 IoCs

Processes:

Bad Rabit.exerundll32.exe

description	ioc	Process
File created	C:\Windows\infpub.dat	Bad Rabit.exe
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\4B51.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/Job

T1053

Processes:

schtasks.exeschtasks.exe

pid	Process
764	schtasks.exe
3476	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

rundll32.exe4B51.tmp

pid	Process
1328	rundll32.exe
1328	rundll32.exe
1328	rundll32.exe
1328	rundll32.exe
4832	4B51.tmp
4832	4B51.tmp
4832	4B51.tmp
4832	4B51.tmp
4832	4B51.tmp
4832	4B51.tmp

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

rundll32.exe4B51.tmp

description	pid	Process
Token: SeShutdownPrivilege	1328	rundll32.exe
Token: SeDebugPrivilege	1328	rundll32.exe
Token: SeTcbPrivilege	1328	rundll32.exe
Token: SeDebugPrivilege	4832	4B51.tmp

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

Bad Rabit.exerundll32.execmd.execmd.execmd.exe

description	pid	Process	procid_target
PID 2552 wrote to memory of 1328	2552	Bad Rabit.exe	78
PID 2552 wrote to memory of 1328	2552	Bad Rabit.exe	78
PID 2552 wrote to memory of 1328	2552	Bad Rabit.exe	78
PID 1328 wrote to memory of 2616	1328	rundll32.exe	79
PID 1328 wrote to memory of 2616	1328	rundll32.exe	79
PID 1328 wrote to memory of 2616	1328	rundll32.exe	79
PID 2616 wrote to memory of 716	2616	cmd.exe	81
PID 2616 wrote to memory of 716	2616	cmd.exe	81
PID 2616 wrote to memory of 716	2616	cmd.exe	81
PID 1328 wrote to memory of 4180	1328	rundll32.exe	82
PID 1328 wrote to memory of 4180	1328	rundll32.exe	82
PID 1328 wrote to memory of 4180	1328	rundll32.exe	82
PID 4180 wrote to memory of 3476	4180	cmd.exe	84
PID 4180 wrote to memory of 3476	4180	cmd.exe	84
PID 4180 wrote to memory of 3476	4180	cmd.exe	84
PID 1328 wrote to memory of 3712	1328	rundll32.exe	85
PID 1328 wrote to memory of 3712	1328	rundll32.exe	85
PID 1328 wrote to memory of 3712	1328	rundll32.exe	85
PID 1328 wrote to memory of 4832	1328	rundll32.exe	87
PID 1328 wrote to memory of 4832	1328	rundll32.exe	87
PID 3712 wrote to memory of 764	3712	cmd.exe	89
PID 3712 wrote to memory of 764	3712	cmd.exe	89
PID 3712 wrote to memory of 764	3712	cmd.exe	89

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:2552
- C:\Windows\SysWOW64\rundll32.exe
  C:\Windows\system32\rundll32.exe C:\Windows\infpub.dat,#1 15
  2⤵
  - Loads dropped DLL
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1328
- - C:\Windows\SysWOW64\cmd.exe
    /c schtasks /Delete /F /TN rhaegal
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2616
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Delete /F /TN rhaegal
      4⤵
      PID:716
- - 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 1334993496 && exit"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4180
  - - 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 1334993496 && exit"
      4⤵
      Creates scheduled task(s)
      PID:3476
- - 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 21:34:00
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3712
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Create /SC once /TN drogon /RU SYSTEM /TR "C:\Windows\system32\shutdown.exe /r /t 0 /f" /ST 21:34:00
      4⤵
      Creates scheduled task(s)
      PID:764
- - C:\Windows\4B51.tmp
    "C:\Windows\4B51.tmp" \\.\pipe\{135FB5CE-49EA-48E9-B82B-0FD16C7056B6}
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4832

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

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\4B51.tmp

Filesize
60KB

MD5
347ac3b6b791054de3e5720a7144a977

SHA1
413eba3973a15c1a6429d9f170f3e8287f98c21c

SHA256
301b905eb98d8d6bb559c04bbda26628a942b2c4107c07a02e8f753bdcfe347c

SHA512
9a399916bc681964af1e1061bc0a8e2926307642557539ad587ce6f9b5ef93bdf1820fe5d7b5ffe5f0bb38e5b4dc6add213ba04048c0c7c264646375fcd01787

Download Submit
C:\Windows\infpub.dat

Filesize
401KB

MD5
1d724f95c61f1055f0d02c2154bbccd3

SHA1
79116fe99f2b421c52ef64097f0f39b815b20907

SHA256
579fd8a0385482fb4c789561a30b09f25671e86422f40ef5cca2036b28f99648

SHA512
f2d7b018d1516df1c97cfff5507957c75c6d9bf8e2ce52ae0052706f4ec62f13eba6d7be17e6ad2b693fdd58e1fd091c37f17bd2b948cdcd9b95b4ad428c0113

Download Submit
memory/1328-3-0x0000000002CF0000-0x0000000002D58000-memory.dmp

Filesize
416KB

Download
memory/1328-11-0x0000000002CF0000-0x0000000002D58000-memory.dmp

Filesize
416KB

Download
memory/1328-14-0x0000000002CF0000-0x0000000002D58000-memory.dmp

Filesize
416KB

Download