5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367

General

Target

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe
Size

1.0MB
MD5

572fea5f025df78f2d316216fbeee52e
SHA1

91b2bf44b1f9282c09f07f16631deaa3ad9d956d
SHA256

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367
SHA512

eb238272227c5825477ff1e37dc4f7e467665049d4db5649fff59c39d7745e88b06234d6d1218c05c802e33e21577f9d4a533cb9e23ebe6fb09654f97759c187

Score

9^/10

persistence discovery exploit ransomware

Malware Config

Signatures

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exeF-97:binF-97.execmd.execmd.execmd.exe

description	pid	process	target process
PID 3100 wrote to memory of 3896	3100	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	F-97:bin
PID 3100 wrote to memory of 3896	3100	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	F-97:bin
PID 3100 wrote to memory of 3896	3100	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	F-97:bin
PID 3896 wrote to memory of 3324	3896	F-97:bin	vssadmin.exe
PID 3896 wrote to memory of 3324	3896	F-97:bin	vssadmin.exe
PID 3896 wrote to memory of 3184	3896	F-97:bin	takeown.exe
PID 3896 wrote to memory of 3184	3896	F-97:bin	takeown.exe
PID 3896 wrote to memory of 3184	3896	F-97:bin	takeown.exe
PID 3896 wrote to memory of 1768	3896	F-97:bin	icacls.exe
PID 3896 wrote to memory of 1768	3896	F-97:bin	icacls.exe
PID 3896 wrote to memory of 1768	3896	F-97:bin	icacls.exe
PID 3012 wrote to memory of 736	3012	F-97.exe	cmd.exe
PID 3012 wrote to memory of 736	3012	F-97.exe	cmd.exe
PID 3012 wrote to memory of 736	3012	F-97.exe	cmd.exe
PID 736 wrote to memory of 2640	736	cmd.exe	choice.exe
PID 736 wrote to memory of 2640	736	cmd.exe	choice.exe
PID 736 wrote to memory of 2640	736	cmd.exe	choice.exe
PID 3896 wrote to memory of 3984	3896	F-97:bin	cmd.exe
PID 3896 wrote to memory of 3984	3896	F-97:bin	cmd.exe
PID 3896 wrote to memory of 3984	3896	F-97:bin	cmd.exe
PID 3100 wrote to memory of 2164	3100	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	cmd.exe
PID 3100 wrote to memory of 2164	3100	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	cmd.exe
PID 3100 wrote to memory of 2164	3100	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	cmd.exe
PID 2164 wrote to memory of 4048	2164	cmd.exe	choice.exe
PID 2164 wrote to memory of 4048	2164	cmd.exe	choice.exe
PID 2164 wrote to memory of 4048	2164	cmd.exe	choice.exe
PID 3984 wrote to memory of 3792	3984	cmd.exe	choice.exe
PID 3984 wrote to memory of 3792	3984	cmd.exe	choice.exe
PID 3984 wrote to memory of 3792	3984	cmd.exe	choice.exe
PID 736 wrote to memory of 3280	736	cmd.exe	attrib.exe
PID 736 wrote to memory of 3280	736	cmd.exe	attrib.exe
PID 736 wrote to memory of 3280	736	cmd.exe	attrib.exe
PID 2164 wrote to memory of 3852	2164	cmd.exe	attrib.exe
PID 2164 wrote to memory of 3852	2164	cmd.exe	attrib.exe
PID 2164 wrote to memory of 3852	2164	cmd.exe	attrib.exe
PID 3984 wrote to memory of 1984	3984	cmd.exe	attrib.exe
PID 3984 wrote to memory of 1984	3984	cmd.exe	attrib.exe
PID 3984 wrote to memory of 1984	3984	cmd.exe	attrib.exe

Executes dropped EXE 2 IoCs

Processes:

F-97:binF-97.exe

pid process

3896 F-97:bin
3012 F-97.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 3828 vssvc.exe
Token: SeRestorePrivilege 3828 vssvc.exe
Token: SeAuditPrivilege 3828 vssvc.exe

pid	process
3896	F-97:bin
3012	F-97.exe

description	pid	process
Token: SeBackupPrivilege	3828	vssvc.exe
Token: SeRestorePrivilege	3828	vssvc.exe
Token: SeAuditPrivilege	3828	vssvc.exe

Drops file in System32 directory 2 IoCs

Processes:

attrib.exeF-97:bin

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\F-97.exe	attrib.exe
File opened for modification	C:\Windows\SysWOW64\F-97.exe	F-97:bin

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

3184 takeown.exe
1768 icacls.exe
Views/modifies file attributes 1 TTPs 3 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exeattrib.exe

pid process

3280 attrib.exe
3852 attrib.exe
1984 attrib.exe
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Processes:

vssadmin.exe

pid process

3324 vssadmin.exe

pid	process
3184	takeown.exe
1768	icacls.exe

pid	process
3280	attrib.exe
3852	attrib.exe
1984	attrib.exe

pid	process
3324	vssadmin.exe

Modifies service 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

vssvc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5}	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\COM+ REGDB Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer	vssvc.exe

Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exetakeown.exe

pid process

1768 icacls.exe
3184 takeown.exe

pid	process
1768	icacls.exe
3184	takeown.exe

NTFS ADS 1 IoCs

Processes:

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\F-97:bin	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe

C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe
"C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
1⤵
- Suspicious use of WriteProcessMemory
- NTFS ADS
PID:3100

C:\Users\Admin\AppData\Roaming\F-97:bin
C:\Users\Admin\AppData\Roaming\F-97:bin -r
2⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
- Drops file in System32 directory
PID:3896

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:3324

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /F C:\Windows\system32\F-97.exe
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:3184

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\F-97.exe /reset
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1768

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\F-97" & del "C:\Users\Admin\AppData\Roaming\F-97"
3⤵
- Suspicious use of WriteProcessMemory
PID:3984

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:3792

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\F-97"
4⤵
- Views/modifies file attributes
PID:1984

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe" & del "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2164

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:4048

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
3⤵
- Views/modifies file attributes
PID:3852

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
- Modifies service
PID:3828

C:\Windows\SysWOW64\F-97.exe
C:\Windows\SysWOW64\F-97.exe -s
1⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:3012

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\F-97.exe" & del "C:\Windows\SysWOW64\F-97.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:736

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:2640

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Windows\SysWOW64\F-97.exe"
3⤵
- Drops file in System32 directory
- Views/modifies file attributes
PID:3280