26f9eafb7869a2bfa9af2ede0363c2a41af6839c4263f6c107ab723de9dd2e37

Analysis

max time kernel
17s
max time network
18s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
02/09/2024, 23:38

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General

Target

2024-09-02_523c9df50948340df2e82213b22c72b7_bkransomware.exe
Size

6.7MB
MD5

523c9df50948340df2e82213b22c72b7
SHA1

9260e4afb910e4f0c98aad1bf8b9bc31f5d7467f
SHA256

26f9eafb7869a2bfa9af2ede0363c2a41af6839c4263f6c107ab723de9dd2e37
SHA512

28432c1fe74d0f74f3b2edce9cdb2a987e170cd19738384ca63be432108d17d636fc78fc4d55a84b36f7c19ea1999988cd488798064daef986784d6eb4e92c32
SSDEEP

196608:8BHQB/DJvDD2YxyHx96sbsWX/sD0WlHfvpeRYXqZk+:uHYvZx2dbP0AWlJQYXqZk

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
1912	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
2424	forfiles.exe
1372	forfiles.exe
1636	forfiles.exe
2464	forfiles.exe
2280	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	2504	WerFault.exe	28

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	forfiles.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	2024-09-02_523c9df50948340df2e82213b22c72b7_bkransomware.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	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	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	powershell.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1912	powershell.exe
1912	powershell.exe
1912	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1912	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2504 wrote to memory of 2316	2504	2024-09-02_523c9df50948340df2e82213b22c72b7_bkransomware.exe	29
PID 2504 wrote to memory of 2316	2504	2024-09-02_523c9df50948340df2e82213b22c72b7_bkransomware.exe	29
PID 2504 wrote to memory of 2316	2504	2024-09-02_523c9df50948340df2e82213b22c72b7_bkransomware.exe	29
PID 2504 wrote to memory of 2316	2504	2024-09-02_523c9df50948340df2e82213b22c72b7_bkransomware.exe	29
PID 2316 wrote to memory of 2424	2316	cmd.exe	31
PID 2316 wrote to memory of 2424	2316	cmd.exe	31
PID 2316 wrote to memory of 2424	2316	cmd.exe	31
PID 2316 wrote to memory of 2424	2316	cmd.exe	31
PID 2424 wrote to memory of 1700	2424	forfiles.exe	32
PID 2424 wrote to memory of 1700	2424	forfiles.exe	32
PID 2424 wrote to memory of 1700	2424	forfiles.exe	32
PID 2424 wrote to memory of 1700	2424	forfiles.exe	32
PID 1700 wrote to memory of 812	1700	cmd.exe	33
PID 1700 wrote to memory of 812	1700	cmd.exe	33
PID 1700 wrote to memory of 812	1700	cmd.exe	33
PID 1700 wrote to memory of 812	1700	cmd.exe	33
PID 2316 wrote to memory of 1372	2316	cmd.exe	34
PID 2316 wrote to memory of 1372	2316	cmd.exe	34
PID 2316 wrote to memory of 1372	2316	cmd.exe	34
PID 2316 wrote to memory of 1372	2316	cmd.exe	34
PID 1372 wrote to memory of 2040	1372	forfiles.exe	35
PID 1372 wrote to memory of 2040	1372	forfiles.exe	35
PID 1372 wrote to memory of 2040	1372	forfiles.exe	35
PID 1372 wrote to memory of 2040	1372	forfiles.exe	35
PID 2040 wrote to memory of 2036	2040	cmd.exe	36
PID 2040 wrote to memory of 2036	2040	cmd.exe	36
PID 2040 wrote to memory of 2036	2040	cmd.exe	36
PID 2040 wrote to memory of 2036	2040	cmd.exe	36
PID 2316 wrote to memory of 1636	2316	cmd.exe	37
PID 2316 wrote to memory of 1636	2316	cmd.exe	37
PID 2316 wrote to memory of 1636	2316	cmd.exe	37
PID 2316 wrote to memory of 1636	2316	cmd.exe	37
PID 1636 wrote to memory of 1652	1636	forfiles.exe	38
PID 1636 wrote to memory of 1652	1636	forfiles.exe	38
PID 1636 wrote to memory of 1652	1636	forfiles.exe	38
PID 1636 wrote to memory of 1652	1636	forfiles.exe	38
PID 1652 wrote to memory of 2200	1652	cmd.exe	39
PID 1652 wrote to memory of 2200	1652	cmd.exe	39
PID 1652 wrote to memory of 2200	1652	cmd.exe	39
PID 1652 wrote to memory of 2200	1652	cmd.exe	39
PID 2316 wrote to memory of 2464	2316	cmd.exe	40
PID 2316 wrote to memory of 2464	2316	cmd.exe	40
PID 2316 wrote to memory of 2464	2316	cmd.exe	40
PID 2316 wrote to memory of 2464	2316	cmd.exe	40
PID 2464 wrote to memory of 2428	2464	forfiles.exe	41
PID 2464 wrote to memory of 2428	2464	forfiles.exe	41
PID 2464 wrote to memory of 2428	2464	forfiles.exe	41
PID 2464 wrote to memory of 2428	2464	forfiles.exe	41
PID 2428 wrote to memory of 2700	2428	cmd.exe	42
PID 2428 wrote to memory of 2700	2428	cmd.exe	42
PID 2428 wrote to memory of 2700	2428	cmd.exe	42
PID 2428 wrote to memory of 2700	2428	cmd.exe	42
PID 2316 wrote to memory of 2280	2316	cmd.exe	43
PID 2316 wrote to memory of 2280	2316	cmd.exe	43
PID 2316 wrote to memory of 2280	2316	cmd.exe	43
PID 2316 wrote to memory of 2280	2316	cmd.exe	43
PID 2280 wrote to memory of 2460	2280	forfiles.exe	44
PID 2280 wrote to memory of 2460	2280	forfiles.exe	44
PID 2280 wrote to memory of 2460	2280	forfiles.exe	44
PID 2280 wrote to memory of 2460	2280	forfiles.exe	44
PID 2460 wrote to memory of 1912	2460	cmd.exe	45
PID 2460 wrote to memory of 1912	2460	cmd.exe	45
PID 2460 wrote to memory of 1912	2460	cmd.exe	45
PID 2460 wrote to memory of 1912	2460	cmd.exe	45

C:\Users\Admin\AppData\Local\Temp\2024-09-02_523c9df50948340df2e82213b22c72b7_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-02_523c9df50948340df2e82213b22c72b7_bkransomware.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2504
- 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:2316
- - 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:2424
  - - 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:1700
    - - \??\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:812
- - 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:1372
  - - 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:2040
    - - \??\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:2036
- - 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:1636
  - - 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:1652
    - - \??\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:2200
- - 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:2464
  - - 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:2428
    - - \??\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:2700
- - 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:2280
  - - 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:2460
    - - 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:1912
      - C:\Windows\SysWOW64\gpupdate.exe
        
        "C:\Windows\system32\gpupdate.exe" /force
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:2840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2504 -s 208
  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/2504-0-0x0000000000100000-0x00000000007B1000-memory.dmp

Filesize
6.7MB

Download
memory/2504-3-0x0000000010000000-0x0000000011E58000-memory.dmp

Filesize
30.3MB

Download
memory/2504-7-0x0000000000100000-0x00000000007B1000-memory.dmp

Filesize
6.7MB

Download