f3861eabc29fdcfeeb2285284a14f936cfaf15eb32b03a7ffbdd244ef49c2299

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
08/06/2024, 18:24

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General

Target

2024-06-08_7a3a9717e6795c025e2708df2bea8aa7_bkransomware.exe
Size

6.6MB
MD5

7a3a9717e6795c025e2708df2bea8aa7
SHA1

5faf35ac2d4093d1f520d0cdcb2ad78b03cf3704
SHA256

f3861eabc29fdcfeeb2285284a14f936cfaf15eb32b03a7ffbdd244ef49c2299
SHA512

b4a0706c3a15bb66c26d9184b64e2c33301c31073b7c3d248ca991a6db5436fdd304019bd515fcd6e483ac370314054b32f7acfba26d1f2d8ac46cb2cab3337c
SSDEEP

196608:NWQH1sQqOwekLRZeWHrHvDH9mjFd+A1h4Vm:oQH1AOweeRgcDHSMNm

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
2720	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
2380	2968	WerFault.exe	27

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 2968 wrote to memory of 1300	2968	2024-06-08_7a3a9717e6795c025e2708df2bea8aa7_bkransomware.exe	28
PID 2968 wrote to memory of 1300	2968	2024-06-08_7a3a9717e6795c025e2708df2bea8aa7_bkransomware.exe	28
PID 2968 wrote to memory of 1300	2968	2024-06-08_7a3a9717e6795c025e2708df2bea8aa7_bkransomware.exe	28
PID 2968 wrote to memory of 1300	2968	2024-06-08_7a3a9717e6795c025e2708df2bea8aa7_bkransomware.exe	28
PID 1300 wrote to memory of 2836	1300	cmd.exe	30
PID 1300 wrote to memory of 2836	1300	cmd.exe	30
PID 1300 wrote to memory of 2836	1300	cmd.exe	30
PID 1300 wrote to memory of 2836	1300	cmd.exe	30
PID 2836 wrote to memory of 2104	2836	forfiles.exe	31
PID 2836 wrote to memory of 2104	2836	forfiles.exe	31
PID 2836 wrote to memory of 2104	2836	forfiles.exe	31
PID 2836 wrote to memory of 2104	2836	forfiles.exe	31
PID 2104 wrote to memory of 2736	2104	cmd.exe	32
PID 2104 wrote to memory of 2736	2104	cmd.exe	32
PID 2104 wrote to memory of 2736	2104	cmd.exe	32
PID 2104 wrote to memory of 2736	2104	cmd.exe	32
PID 1300 wrote to memory of 2636	1300	cmd.exe	33
PID 1300 wrote to memory of 2636	1300	cmd.exe	33
PID 1300 wrote to memory of 2636	1300	cmd.exe	33
PID 1300 wrote to memory of 2636	1300	cmd.exe	33
PID 2636 wrote to memory of 2400	2636	forfiles.exe	34
PID 2636 wrote to memory of 2400	2636	forfiles.exe	34
PID 2636 wrote to memory of 2400	2636	forfiles.exe	34
PID 2636 wrote to memory of 2400	2636	forfiles.exe	34
PID 2400 wrote to memory of 2096	2400	cmd.exe	35
PID 2400 wrote to memory of 2096	2400	cmd.exe	35
PID 2400 wrote to memory of 2096	2400	cmd.exe	35
PID 2400 wrote to memory of 2096	2400	cmd.exe	35
PID 1300 wrote to memory of 3060	1300	cmd.exe	36
PID 1300 wrote to memory of 3060	1300	cmd.exe	36
PID 1300 wrote to memory of 3060	1300	cmd.exe	36
PID 1300 wrote to memory of 3060	1300	cmd.exe	36
PID 3060 wrote to memory of 3012	3060	forfiles.exe	37
PID 3060 wrote to memory of 3012	3060	forfiles.exe	37
PID 3060 wrote to memory of 3012	3060	forfiles.exe	37
PID 3060 wrote to memory of 3012	3060	forfiles.exe	37
PID 3012 wrote to memory of 2560	3012	cmd.exe	38
PID 3012 wrote to memory of 2560	3012	cmd.exe	38
PID 3012 wrote to memory of 2560	3012	cmd.exe	38
PID 3012 wrote to memory of 2560	3012	cmd.exe	38
PID 1300 wrote to memory of 2600	1300	cmd.exe	39
PID 1300 wrote to memory of 2600	1300	cmd.exe	39
PID 1300 wrote to memory of 2600	1300	cmd.exe	39
PID 1300 wrote to memory of 2600	1300	cmd.exe	39
PID 2600 wrote to memory of 2652	2600	forfiles.exe	40
PID 2600 wrote to memory of 2652	2600	forfiles.exe	40
PID 2600 wrote to memory of 2652	2600	forfiles.exe	40
PID 2600 wrote to memory of 2652	2600	forfiles.exe	40
PID 2652 wrote to memory of 2676	2652	cmd.exe	41
PID 2652 wrote to memory of 2676	2652	cmd.exe	41
PID 2652 wrote to memory of 2676	2652	cmd.exe	41
PID 2652 wrote to memory of 2676	2652	cmd.exe	41
PID 1300 wrote to memory of 2680	1300	cmd.exe	42
PID 1300 wrote to memory of 2680	1300	cmd.exe	42
PID 1300 wrote to memory of 2680	1300	cmd.exe	42
PID 1300 wrote to memory of 2680	1300	cmd.exe	42
PID 2680 wrote to memory of 2696	2680	forfiles.exe	43
PID 2680 wrote to memory of 2696	2680	forfiles.exe	43
PID 2680 wrote to memory of 2696	2680	forfiles.exe	43
PID 2680 wrote to memory of 2696	2680	forfiles.exe	43
PID 2696 wrote to memory of 2720	2696	cmd.exe	44
PID 2696 wrote to memory of 2720	2696	cmd.exe	44
PID 2696 wrote to memory of 2720	2696	cmd.exe	44
PID 2696 wrote to memory of 2720	2696	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\2024-06-08_7a3a9717e6795c025e2708df2bea8aa7_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-08_7a3a9717e6795c025e2708df2bea8aa7_bkransomware.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2968
- 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 cmd.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 cmd.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 calc.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 notepad.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1300
- - 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:2836
  - - 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:2104
    - - \??\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:2736
- - 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 2147814524 /t REG_SZ /d 6"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2636
  - - 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:2400
    - - \??\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:2096
- - 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 2147780199 /t REG_SZ /d 6"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3060
  - - 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:3012
    - - \??\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:2560
- - 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 2147812831 /t REG_SZ /d 6"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2600
  - - 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:2652
    - - \??\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:2676
- - C:\Windows\SysWOW64\forfiles.exe
    forfiles /p c:\windows\system32 /m notepad.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2680
  - - C:\Windows\SysWOW64\cmd.exe
      /C powershell start-process -WindowStyle Hidden gpupdate.exe /force
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2696
    - - 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:2720
      - C:\Windows\SysWOW64\gpupdate.exe
        
        "C:\Windows\system32\gpupdate.exe" /force
        6⤵
        
        PID:2520
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2968 -s 608
  2⤵
  - Program crash
  PID:2380

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

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Downloads

memory/2968-2-0x0000000010000000-0x00000000105D8000-memory.dmp

Filesize
5.8MB

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