3505bc92994bc33ab71bfb458177e0b8c34c7d9aed7d75f23df261d08417a168

General

Target

sample.exe
Size

56KB
MD5

ecb00e9a61f99a7d4c90723294986bbc
SHA1

be59c867da75e2a66b8c2519e950254f817cd4ad
SHA256

8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80
SHA512

9dee79827d865de41a63962b419eed7e1f9610ff27f00f8b7b2b9f51e905d5db907d310da590d8f1a11ac88e549373edf39bffdb44d1b205728f1b5e0a43aa5e

Score

9^/10

ransomware persistence discovery exploit

Malware Config

Signatures

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

3200 vssadmin.exe

pid	process
3200	vssadmin.exe

Drops file in System32 directory 2 IoCs

Processes:

Launch:binattrib.exe

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

Views/modifies file attributes 1 TTPs 3 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exeattrib.exe

pid process

3200 attrib.exe
688 attrib.exe
1660 attrib.exe
NTFS ADS 1 IoCs

Processes:

sample.exe

description ioc process

File opened for modification C:\Users\Admin\AppData\Roaming\Launch:bin sample.exe

pid	process
3200	attrib.exe
688	attrib.exe
1660	attrib.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Launch:bin	sample.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

sample.exeLaunch:binLaunch.execmd.execmd.execmd.exe

description	pid	process	target process
PID 3412 wrote to memory of 3836	3412	sample.exe	Launch:bin
PID 3412 wrote to memory of 3836	3412	sample.exe	Launch:bin
PID 3412 wrote to memory of 3836	3412	sample.exe	Launch:bin
PID 3836 wrote to memory of 3200	3836	Launch:bin	vssadmin.exe
PID 3836 wrote to memory of 3200	3836	Launch:bin	vssadmin.exe
PID 3836 wrote to memory of 1812	3836	Launch:bin	takeown.exe
PID 3836 wrote to memory of 1812	3836	Launch:bin	takeown.exe
PID 3836 wrote to memory of 1812	3836	Launch:bin	takeown.exe
PID 3836 wrote to memory of 732	3836	Launch:bin	icacls.exe
PID 3836 wrote to memory of 732	3836	Launch:bin	icacls.exe
PID 3836 wrote to memory of 732	3836	Launch:bin	icacls.exe
PID 3040 wrote to memory of 2788	3040	Launch.exe	cmd.exe
PID 3040 wrote to memory of 2788	3040	Launch.exe	cmd.exe
PID 3040 wrote to memory of 2788	3040	Launch.exe	cmd.exe
PID 2788 wrote to memory of 3912	2788	cmd.exe	choice.exe
PID 2788 wrote to memory of 3912	2788	cmd.exe	choice.exe
PID 2788 wrote to memory of 3912	2788	cmd.exe	choice.exe
PID 3836 wrote to memory of 3692	3836	Launch:bin	cmd.exe
PID 3836 wrote to memory of 3692	3836	Launch:bin	cmd.exe
PID 3836 wrote to memory of 3692	3836	Launch:bin	cmd.exe
PID 3412 wrote to memory of 3764	3412	sample.exe	cmd.exe
PID 3412 wrote to memory of 3764	3412	sample.exe	cmd.exe
PID 3412 wrote to memory of 3764	3412	sample.exe	cmd.exe
PID 3692 wrote to memory of 3608	3692	cmd.exe	choice.exe
PID 3692 wrote to memory of 3608	3692	cmd.exe	choice.exe
PID 3692 wrote to memory of 3608	3692	cmd.exe	choice.exe
PID 3764 wrote to memory of 256	3764	cmd.exe	choice.exe
PID 3764 wrote to memory of 256	3764	cmd.exe	choice.exe
PID 3764 wrote to memory of 256	3764	cmd.exe	choice.exe
PID 2788 wrote to memory of 3200	2788	cmd.exe	attrib.exe
PID 2788 wrote to memory of 3200	2788	cmd.exe	attrib.exe
PID 2788 wrote to memory of 3200	2788	cmd.exe	attrib.exe
PID 3692 wrote to memory of 688	3692	cmd.exe	attrib.exe
PID 3692 wrote to memory of 688	3692	cmd.exe	attrib.exe
PID 3692 wrote to memory of 688	3692	cmd.exe	attrib.exe
PID 3764 wrote to memory of 1660	3764	cmd.exe	attrib.exe
PID 3764 wrote to memory of 1660	3764	cmd.exe	attrib.exe
PID 3764 wrote to memory of 1660	3764	cmd.exe	attrib.exe

Executes dropped EXE 2 IoCs

Processes:

Launch:binLaunch.exe

pid process

3836 Launch:bin
3040 Launch.exe
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490
Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

1812 takeown.exe
732 icacls.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 3892 vssvc.exe
Token: SeRestorePrivilege 3892 vssvc.exe
Token: SeAuditPrivilege 3892 vssvc.exe

pid	process
3836	Launch:bin
3040	Launch.exe

pid	process
1812	takeown.exe
732	icacls.exe

description	pid	process
Token: SeBackupPrivilege	3892	vssvc.exe
Token: SeRestorePrivilege	3892	vssvc.exe
Token: SeAuditPrivilege	3892	vssvc.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:

takeown.exeicacls.exe

pid process

1812 takeown.exe
732 icacls.exe

pid	process
1812	takeown.exe
732	icacls.exe

C:\Users\Admin\AppData\Local\Temp\sample.exe
"C:\Users\Admin\AppData\Local\Temp\sample.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:3412

C:\Users\Admin\AppData\Roaming\Launch:bin
C:\Users\Admin\AppData\Roaming\Launch:bin -r
2⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:3836

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:3200

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /F C:\Windows\system32\Launch.exe
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1812

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\Launch.exe /reset
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:732

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Launch" & del "C:\Users\Admin\AppData\Roaming\Launch"
3⤵
- Suspicious use of WriteProcessMemory
PID:3692

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:3608

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Launch"
4⤵
- Views/modifies file attributes
PID:688

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\sample.exe" & del "C:\Users\Admin\AppData\Local\Temp\sample.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3764

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:256

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\sample.exe"
3⤵
- Views/modifies file attributes
PID:1660

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
- Modifies service
PID:3892

C:\Windows\SysWOW64\Launch.exe
C:\Windows\SysWOW64\Launch.exe -s
1⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:3040

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Launch.exe" & del "C:\Windows\SysWOW64\Launch.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2788

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:3912

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Windows\SysWOW64\Launch.exe"
3⤵
- Drops file in System32 directory
- Views/modifies file attributes
PID:3200