badrabbit | 630325cac09ac3fab908f903e3b00d0dadd5fdaa0875ed8496fcbb97a558d0da | Triage

Resubmissions

04-04-2024 21:22

240404-z72s8saf8t 10

03-03-2024 22:34

240303-2g4k9aba56 10

Analysis

max time kernel
599s
max time network
600s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
03-03-2024 22:34

Sharing

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General

Target

BadRabbit.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

resource	yara_rule
behavioral4/files/0x000600000002a796-20.dat	mimikatz

Blocklisted process makes network request 2 IoCs

flow	pid	Process
327	1356	rundll32.exe
373	1356	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
4944	4C2C.tmp

Loads dropped DLL 1 IoCs

pid	Process
1356	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\4C2C.tmp	rundll32.exe
File created	C:\Windows\infpub.dat	BadRabbit.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.

Scheduled Task/Job

pid	Process
2624	schtasks.exe
1184	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1356	rundll32.exe
1356	rundll32.exe
1356	rundll32.exe
1356	rundll32.exe
4944	4C2C.tmp
4944	4C2C.tmp
4944	4C2C.tmp
4944	4C2C.tmp
4944	4C2C.tmp
4944	4C2C.tmp

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1356	rundll32.exe
Token: SeDebugPrivilege	1356	rundll32.exe
Token: SeTcbPrivilege	1356	rundll32.exe
Token: SeDebugPrivilege	4944	4C2C.tmp

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 1356	2288	BadRabbit.exe	78
PID 2288 wrote to memory of 1356	2288	BadRabbit.exe	78
PID 2288 wrote to memory of 1356	2288	BadRabbit.exe	78
PID 1356 wrote to memory of 4356	1356	rundll32.exe	79
PID 1356 wrote to memory of 4356	1356	rundll32.exe	79
PID 1356 wrote to memory of 4356	1356	rundll32.exe	79
PID 4356 wrote to memory of 4244	4356	cmd.exe	81
PID 4356 wrote to memory of 4244	4356	cmd.exe	81
PID 4356 wrote to memory of 4244	4356	cmd.exe	81
PID 1356 wrote to memory of 3184	1356	rundll32.exe	82
PID 1356 wrote to memory of 3184	1356	rundll32.exe	82
PID 1356 wrote to memory of 3184	1356	rundll32.exe	82
PID 3184 wrote to memory of 2624	3184	cmd.exe	84
PID 3184 wrote to memory of 2624	3184	cmd.exe	84
PID 3184 wrote to memory of 2624	3184	cmd.exe	84
PID 1356 wrote to memory of 3872	1356	rundll32.exe	85
PID 1356 wrote to memory of 3872	1356	rundll32.exe	85
PID 1356 wrote to memory of 3872	1356	rundll32.exe	85
PID 1356 wrote to memory of 4944	1356	rundll32.exe	87
PID 1356 wrote to memory of 4944	1356	rundll32.exe	87
PID 3872 wrote to memory of 1184	3872	cmd.exe	89
PID 3872 wrote to memory of 1184	3872	cmd.exe	89
PID 3872 wrote to memory of 1184	3872	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\BadRabbit.exe
"C:\Users\Admin\AppData\Local\Temp\BadRabbit.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2288
- 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:1356
- - C:\Windows\SysWOW64\cmd.exe
    /c schtasks /Delete /F /TN rhaegal
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4356
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Delete /F /TN rhaegal
      4⤵
      PID:4244
- - 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 3936875233 && exit"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3184
  - - 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 3936875233 && exit"
      4⤵
      Creates scheduled task(s)
      PID:2624
- - 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 23:24:00
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3872
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Create /SC once /TN drogon /RU SYSTEM /TR "C:\Windows\system32\shutdown.exe /r /t 0 /f" /ST 23:24:00
      4⤵
      Creates scheduled task(s)
      PID:1184
- - C:\Windows\4C2C.tmp
    "C:\Windows\4C2C.tmp" \\.\pipe\{FA8A3D8F-B794-4D06-A659-AFABB7425F2B}
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\4C2C.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/1356-3-0x0000000000DF0000-0x0000000000E58000-memory.dmp

Filesize
416KB

Download
memory/1356-11-0x0000000000DF0000-0x0000000000E58000-memory.dmp

Filesize
416KB

Download
memory/1356-14-0x0000000000DF0000-0x0000000000E58000-memory.dmp

Filesize
416KB

Download