badrabbit | 2a45e44be359fba4c85591e7b13d1ec772ed181adc41254d8b00d31b2d15878e

max time kernel
149s
max time network
153s
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 21:25

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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/0x000500000002a9f3-20.dat	mimikatz

Executes dropped EXE 1 IoCs

Processes:

66A9.tmp

pid	Process
1564	66A9.tmp

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid	Process
4764	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\66A9.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
2112	schtasks.exe
928	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

rundll32.exe66A9.tmp

pid	Process
4764	rundll32.exe
4764	rundll32.exe
4764	rundll32.exe
4764	rundll32.exe
1564	66A9.tmp
1564	66A9.tmp
1564	66A9.tmp
1564	66A9.tmp
1564	66A9.tmp
1564	66A9.tmp

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

rundll32.exe66A9.tmp

description	pid	Process
Token: SeShutdownPrivilege	4764	rundll32.exe
Token: SeDebugPrivilege	4764	rundll32.exe
Token: SeTcbPrivilege	4764	rundll32.exe
Token: SeDebugPrivilege	1564	66A9.tmp

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

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

description	pid	Process	procid_target
PID 5028 wrote to memory of 4764	5028	Bad Rabit.exe	81
PID 5028 wrote to memory of 4764	5028	Bad Rabit.exe	81
PID 5028 wrote to memory of 4764	5028	Bad Rabit.exe	81
PID 4764 wrote to memory of 3564	4764	rundll32.exe	82
PID 4764 wrote to memory of 3564	4764	rundll32.exe	82
PID 4764 wrote to memory of 3564	4764	rundll32.exe	82
PID 3564 wrote to memory of 1520	3564	cmd.exe	84
PID 3564 wrote to memory of 1520	3564	cmd.exe	84
PID 3564 wrote to memory of 1520	3564	cmd.exe	84
PID 4764 wrote to memory of 2024	4764	rundll32.exe	86
PID 4764 wrote to memory of 2024	4764	rundll32.exe	86
PID 4764 wrote to memory of 2024	4764	rundll32.exe	86
PID 4764 wrote to memory of 2836	4764	rundll32.exe	88
PID 4764 wrote to memory of 2836	4764	rundll32.exe	88
PID 4764 wrote to memory of 2836	4764	rundll32.exe	88
PID 4764 wrote to memory of 1564	4764	rundll32.exe	90
PID 4764 wrote to memory of 1564	4764	rundll32.exe	90
PID 2836 wrote to memory of 2112	2836	cmd.exe	92
PID 2836 wrote to memory of 2112	2836	cmd.exe	92
PID 2836 wrote to memory of 2112	2836	cmd.exe	92
PID 2024 wrote to memory of 928	2024	cmd.exe	93
PID 2024 wrote to memory of 928	2024	cmd.exe	93
PID 2024 wrote to memory of 928	2024	cmd.exe	93

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:5028
- 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:4764
- - C:\Windows\SysWOW64\cmd.exe
    /c schtasks /Delete /F /TN rhaegal
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3564
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Delete /F /TN rhaegal
      4⤵
      PID:1520
- - 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 2322608788 && exit"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2024
  - - 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 2322608788 && exit"
      4⤵
      Creates scheduled task(s)
      PID:928
- - 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 21:44:00
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2836
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Create /SC once /TN drogon /RU SYSTEM /TR "C:\Windows\system32\shutdown.exe /r /t 0 /f" /ST 21:44:00
      4⤵
      Creates scheduled task(s)
      PID:2112
- - C:\Windows\66A9.tmp
    "C:\Windows\66A9.tmp" \\.\pipe\{3176683C-9B0D-419F-B792-C4ED48728431}
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1564

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\66A9.tmp

Filesize
60KB

MD5
347ac3b6b791054de3e5720a7144a977

SHA1
413eba3973a15c1a6429d9f170f3e8287f98c21c

SHA256
301b905eb98d8d6bb559c04bbda26628a942b2c4107c07a02e8f753bdcfe347c

SHA512
9a399916bc681964af1e1061bc0a8e2926307642557539ad587ce6f9b5ef93bdf1820fe5d7b5ffe5f0bb38e5b4dc6add213ba04048c0c7c264646375fcd01787

Download Submit
C:\Windows\infpub.dat

Filesize
401KB

MD5
2b2479fe80dde99dd497a1ca41d5aa23

SHA1
19116ce6ff6d859a91d5a9c7828b6b793c431479

SHA256
a96e54ac864ab635e4b05b29404555c56ec5bcd50183384de3a724c4c80334dd

SHA512
d6ad7e7216073181d36002c704a1ffbe9823ebf8fac85a21f8d98fe21d6d28f0de338fbf7d7e7f857056c04a14729b8406db77a47b3dbd26bc873dd2ff9f4b37

Download Submit
memory/4764-3-0x0000000002710000-0x0000000002778000-memory.dmp

Filesize
416KB

Download
memory/4764-11-0x0000000002710000-0x0000000002778000-memory.dmp

Filesize
416KB

Download
memory/4764-14-0x0000000002710000-0x0000000002778000-memory.dmp

Filesize
416KB

Download