badrabbit | 630325cac09ac3fab908f903e3b00d0dadd5fdaa0875ed8496fcbb97a558d0da | Triage™

Resubmissions

04/04/2024, 21:22

240404-z72s8saf8t10

03/03/2024, 22:34

240303-2g4k9aba5610

Analysis

max time kernel
598s
max time network
600s
platform
windows10-1703_x64
resource
win10-20240221-en
resource tags

arch:x64arch:x86image:win10-20240221-enlocale:en-usos:windows10-1703-x64system
submitted
03/03/2024, 22:34

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General

Target
BadRabbit.exe
Size 431KB
Sample240303-2g4k9aba56
SHA256 630325cac09ac3fab908f903e3b00d0dadd5fdaa0875ed8496fcbb97a558d0da
MD5 fbbdc39af1139aebba4da004475e8839
SHA1 de5c8d858e6e41da715dca1c019df0bfb92d32c0
SHA512 74eca8c01de215b33d5ceea1fda3f3bef96b513f58a750dba04b0de36f7ef4f7846a6431d52879ca0d8641bfd504d4721a9a96fa2e18c6888fd67fa77686af87
SSDEEP 12288:BHNTywFAvN86pLbqWRKHZKfErrZJyZ0yqsGO3XR63:vT56NbqWRwZaEr3yt2O3XR63
MD5 SHA1 SHA512 SSDEEP

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
behavioral2/files/0x000700000001abe2-20.dat	mimikatz

Blocklisted process makes network request 5 IoCs

flow	pid	Process
331	2244	rundll32.exe
359	2244	rundll32.exe
389	2244	rundll32.exe
431	2244	rundll32.exe
472	2244	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
2544	686E.tmp

Drops file in Windows directory 5 IoCs

description	ioc	Process
File created	C:\Windows\dispci.exe	rundll32.exe
File opened for modification	C:\Windows\686E.tmp	rundll32.exe
File created	C:\Windows\infpub.dat	BadRabbit.exe
File opened for modification	C:\Windows\infpub.dat	rundll32.exe
File created	C:\Windows\cscc.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
4988	schtasks.exe
4512	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2244	rundll32.exe
2244	rundll32.exe
2244	rundll32.exe
2244	rundll32.exe
2544	686E.tmp
2544	686E.tmp
2544	686E.tmp
2544	686E.tmp
2544	686E.tmp
2544	686E.tmp

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeShutdownPrivilege	2244	rundll32.exe
Token: SeDebugPrivilege	2244	rundll32.exe
Token: SeTcbPrivilege	2244	rundll32.exe
Token: SeDebugPrivilege	2544	686E.tmp

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3980 wrote to memory of 2244	3980	BadRabbit.exe	74
PID 3980 wrote to memory of 2244	3980	BadRabbit.exe	74
PID 3980 wrote to memory of 2244	3980	BadRabbit.exe	74
PID 2244 wrote to memory of 4752	2244	rundll32.exe	75
PID 2244 wrote to memory of 4752	2244	rundll32.exe	75
PID 2244 wrote to memory of 4752	2244	rundll32.exe	75
PID 4752 wrote to memory of 5024	4752	cmd.exe	77
PID 4752 wrote to memory of 5024	4752	cmd.exe	77
PID 4752 wrote to memory of 5024	4752	cmd.exe	77
PID 2244 wrote to memory of 4352	2244	rundll32.exe	78
PID 2244 wrote to memory of 4352	2244	rundll32.exe	78
PID 2244 wrote to memory of 4352	2244	rundll32.exe	78
PID 2244 wrote to memory of 5048	2244	rundll32.exe	80
PID 2244 wrote to memory of 5048	2244	rundll32.exe	80
PID 2244 wrote to memory of 5048	2244	rundll32.exe	80
PID 4352 wrote to memory of 4512	4352	cmd.exe	81
PID 4352 wrote to memory of 4512	4352	cmd.exe	81
PID 4352 wrote to memory of 4512	4352	cmd.exe	81
PID 2244 wrote to memory of 2544	2244	rundll32.exe	83
PID 2244 wrote to memory of 2544	2244	rundll32.exe	83
PID 5048 wrote to memory of 4988	5048	cmd.exe	85
PID 5048 wrote to memory of 4988	5048	cmd.exe	85
PID 5048 wrote to memory of 4988	5048	cmd.exe	85

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:3980
- C:\Windows\SysWOW64\rundll32.exe
  C:\Windows\system32\rundll32.exe C:\Windows\infpub.dat,#1 15
  2⤵
  - Blocklisted process makes network request
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2244
- - C:\Windows\SysWOW64\cmd.exe
    /c schtasks /Delete /F /TN rhaegal
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4752
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Delete /F /TN rhaegal
      4⤵
      PID:5024
- - 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 944487547 && exit"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4352
  - - 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 944487547 && exit"
      4⤵
      Creates scheduled task(s)
      PID:4512
- - 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 23:23:00
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5048
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Create /SC once /TN drogon /RU SYSTEM /TR "C:\Windows\system32\shutdown.exe /r /t 0 /f" /ST 23:23:00
      4⤵
      Creates scheduled task(s)
      PID:4988
- - C:\Windows\686E.tmp
    "C:\Windows\686E.tmp" \\.\pipe\{8436E2B6-2253-4DDF-B2A0-B36C722292FD}
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2544

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

686E.tmp

Path C:\Windows\686E.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/2244-2-0x0000000004320000-0x0000000004388000-memory.dmp

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memory/2244-10-0x0000000004320000-0x0000000004388000-memory.dmp

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memory/2244-13-0x0000000004320000-0x0000000004388000-memory.dmp

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