Analysis
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max time kernel
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max time network
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platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 13:22
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe
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Size
6.7MB
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MD5
f9a08c6959d27b9edcb157f1938ff8c9
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SHA1
f57fc4c0780afc65f84b3f1fddd55bdd7519c3e2
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SHA256
d052b74c87dd082fa1ccc32b8441e63e433a60c69b21174ccf43f7f134a725e0
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SHA512
eabdfc83451aa2523b924f670a5026438dc69ae9c0687b8bf12c9e318e0bbab34862ebc7e39221f140af67cd9622e5e4f9c7881feb7376bb9c4fd31e3b62fe33
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SSDEEP
196608:JMkbose8INju/m+EPBRXKQhjFzRDevEu:JgsWUaBRV3RH
Malware Config
Signatures
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Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
pid Process 5072 powershell.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 2216 3420 WerFault.exe 80 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 5072 powershell.exe 5072 powershell.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 5072 powershell.exe -
Suspicious use of WriteProcessMemory 51 IoCs
description pid Process procid_target PID 3420 wrote to memory of 1748 3420 2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe 85 PID 3420 wrote to memory of 1748 3420 2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe 85 PID 3420 wrote to memory of 1748 3420 2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe 85 PID 1748 wrote to memory of 4576 1748 cmd.exe 87 PID 1748 wrote to memory of 4576 1748 cmd.exe 87 PID 1748 wrote to memory of 4576 1748 cmd.exe 87 PID 4576 wrote to memory of 3496 4576 forfiles.exe 88 PID 4576 wrote to memory of 3496 4576 forfiles.exe 88 PID 4576 wrote to memory of 3496 4576 forfiles.exe 88 PID 3496 wrote to memory of 2300 3496 cmd.exe 89 PID 3496 wrote to memory of 2300 3496 cmd.exe 89 PID 3496 wrote to memory of 2300 3496 cmd.exe 89 PID 1748 wrote to memory of 4244 1748 cmd.exe 90 PID 1748 wrote to memory of 4244 1748 cmd.exe 90 PID 1748 wrote to memory of 4244 1748 cmd.exe 90 PID 4244 wrote to memory of 5024 4244 forfiles.exe 91 PID 4244 wrote to memory of 5024 4244 forfiles.exe 91 PID 4244 wrote to memory of 5024 4244 forfiles.exe 91 PID 5024 wrote to memory of 3540 5024 cmd.exe 92 PID 5024 wrote to memory of 3540 5024 cmd.exe 92 PID 5024 wrote to memory of 3540 5024 cmd.exe 92 PID 1748 wrote to memory of 4848 1748 cmd.exe 93 PID 1748 wrote to memory of 4848 1748 cmd.exe 93 PID 1748 wrote to memory of 4848 1748 cmd.exe 93 PID 4848 wrote to memory of 1212 4848 forfiles.exe 94 PID 4848 wrote to memory of 1212 4848 forfiles.exe 94 PID 4848 wrote to memory of 1212 4848 forfiles.exe 94 PID 1212 wrote to memory of 2384 1212 cmd.exe 95 PID 1212 wrote to memory of 2384 1212 cmd.exe 95 PID 1212 wrote to memory of 2384 1212 cmd.exe 95 PID 1748 wrote to memory of 3612 1748 cmd.exe 96 PID 1748 wrote to memory of 3612 1748 cmd.exe 96 PID 1748 wrote to memory of 3612 1748 cmd.exe 96 PID 3612 wrote to memory of 1916 3612 forfiles.exe 97 PID 3612 wrote to memory of 1916 3612 forfiles.exe 97 PID 3612 wrote to memory of 1916 3612 forfiles.exe 97 PID 1916 wrote to memory of 3348 1916 cmd.exe 98 PID 1916 wrote to memory of 3348 1916 cmd.exe 98 PID 1916 wrote to memory of 3348 1916 cmd.exe 98 PID 1748 wrote to memory of 2676 1748 cmd.exe 99 PID 1748 wrote to memory of 2676 1748 cmd.exe 99 PID 1748 wrote to memory of 2676 1748 cmd.exe 99 PID 2676 wrote to memory of 2436 2676 forfiles.exe 100 PID 2676 wrote to memory of 2436 2676 forfiles.exe 100 PID 2676 wrote to memory of 2436 2676 forfiles.exe 100 PID 2436 wrote to memory of 5072 2436 cmd.exe 101 PID 2436 wrote to memory of 5072 2436 cmd.exe 101 PID 2436 wrote to memory of 5072 2436 cmd.exe 101 PID 5072 wrote to memory of 4632 5072 powershell.exe 102 PID 5072 wrote to memory of 4632 5072 powershell.exe 102 PID 5072 wrote to memory of 4632 5072 powershell.exe 102
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3420 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C forfiles /p c:\windows\system32 /m help.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 help.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 ping.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 ping.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 calc.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"2⤵
- Suspicious use of WriteProcessMemory
PID:1748 -
C:\Windows\SysWOW64\forfiles.exeforfiles /p c:\windows\system32 /m help.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:4576 -
C:\Windows\SysWOW64\cmd.exe/C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147735503 /t REG_SZ /d 64⤵
- Suspicious use of WriteProcessMemory
PID:3496 -
\??\c:\windows\SysWOW64\reg.exereg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147735503 /t REG_SZ /d 65⤵PID:2300
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C:\Windows\SysWOW64\forfiles.exeforfiles /p c:\windows\system32 /m help.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:4244 -
C:\Windows\SysWOW64\cmd.exe/C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147814524 /t REG_SZ /d 64⤵
- Suspicious use of WriteProcessMemory
PID:5024 -
\??\c:\windows\SysWOW64\reg.exereg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147814524 /t REG_SZ /d 65⤵PID:3540
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C:\Windows\SysWOW64\forfiles.exeforfiles /p c:\windows\system32 /m ping.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:4848 -
C:\Windows\SysWOW64\cmd.exe/C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147780199 /t REG_SZ /d 64⤵
- Suspicious use of WriteProcessMemory
PID:1212 -
\??\c:\windows\SysWOW64\reg.exereg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147780199 /t REG_SZ /d 65⤵PID:2384
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C:\Windows\SysWOW64\forfiles.exeforfiles /p c:\windows\system32 /m ping.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:3612 -
C:\Windows\SysWOW64\cmd.exe/C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147812831 /t REG_SZ /d 64⤵
- Suspicious use of WriteProcessMemory
PID:1916 -
\??\c:\windows\SysWOW64\reg.exereg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147812831 /t REG_SZ /d 65⤵PID:3348
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C:\Windows\SysWOW64\forfiles.exeforfiles /p c:\windows\system32 /m calc.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"3⤵
- Suspicious use of WriteProcessMemory
PID:2676 -
C:\Windows\SysWOW64\cmd.exe/C powershell start-process -WindowStyle Hidden gpupdate.exe /force4⤵
- Suspicious use of WriteProcessMemory
PID:2436 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell start-process -WindowStyle Hidden gpupdate.exe /force5⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5072 -
C:\Windows\SysWOW64\gpupdate.exe"C:\Windows\system32\gpupdate.exe" /force6⤵PID:4632
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3420 -s 6482⤵
- Program crash
PID:2216
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3420 -ip 34201⤵PID:1920
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82