53ead46fd6527c5e97e29944d6c40302be0b63192d00c1646939330fb2d319c0

General

Target

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe
Size

1.1MB
MD5

13e623cdfb75d99ea7e04c6157ca8ae6
SHA1

f25f0b369a355f30f5e11ac11a7f644bcfefd963
SHA256

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772
SHA512

ea6b5c882a5298e527be1f3c40cc6d75c56453dd0111d7e9818c28fa7ec32feb19f17cab9a9e49eb0ab9f3a987f7dcc5cadfea7ae99a996f174b0a89e674f421

Score

9^/10

discovery exploit ransomware persistence

Malware Config

Signatures

Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

3612 takeown.exe
3856 icacls.exe
Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

3612 takeown.exe
3856 icacls.exe
Views/modifies file attributes 1 TTPs 3 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exeattrib.exe

pid process

3788 attrib.exe
1412 attrib.exe
2124 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

2772 vssadmin.exe
Executes dropped EXE 2 IoCs

Processes:

Classes:binClasses.exe

pid process

2140 Classes:bin
3948 Classes.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 3188 vssvc.exe
Token: SeRestorePrivilege 3188 vssvc.exe
Token: SeAuditPrivilege 3188 vssvc.exe

pid	process
3612	takeown.exe
3856	icacls.exe

pid	process
3612	takeown.exe
3856	icacls.exe

pid	process
3788	attrib.exe
1412	attrib.exe
2124	attrib.exe

pid	process
2772	vssadmin.exe

pid	process
2140	Classes:bin
3948	Classes.exe

description	pid	process
Token: SeBackupPrivilege	3188	vssvc.exe
Token: SeRestorePrivilege	3188	vssvc.exe
Token: SeAuditPrivilege	3188	vssvc.exe

NTFS ADS 1 IoCs

Processes:

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Classes:bin	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.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\Registry Writer	vssvc.exe
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\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

Drops file in System32 directory 2 IoCs

Processes:

attrib.exeClasses:bin

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

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exeClasses:binClasses.execmd.execmd.execmd.exe

description	pid	process	target process
PID 2016 wrote to memory of 2140	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	Classes:bin
PID 2016 wrote to memory of 2140	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	Classes:bin
PID 2016 wrote to memory of 2140	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	Classes:bin
PID 2140 wrote to memory of 2772	2140	Classes:bin	vssadmin.exe
PID 2140 wrote to memory of 2772	2140	Classes:bin	vssadmin.exe
PID 2140 wrote to memory of 3612	2140	Classes:bin	takeown.exe
PID 2140 wrote to memory of 3612	2140	Classes:bin	takeown.exe
PID 2140 wrote to memory of 3612	2140	Classes:bin	takeown.exe
PID 2140 wrote to memory of 3856	2140	Classes:bin	icacls.exe
PID 2140 wrote to memory of 3856	2140	Classes:bin	icacls.exe
PID 2140 wrote to memory of 3856	2140	Classes:bin	icacls.exe
PID 3948 wrote to memory of 3924	3948	Classes.exe	cmd.exe
PID 3948 wrote to memory of 3924	3948	Classes.exe	cmd.exe
PID 3948 wrote to memory of 3924	3948	Classes.exe	cmd.exe
PID 3924 wrote to memory of 724	3924	cmd.exe	choice.exe
PID 3924 wrote to memory of 724	3924	cmd.exe	choice.exe
PID 3924 wrote to memory of 724	3924	cmd.exe	choice.exe
PID 2140 wrote to memory of 672	2140	Classes:bin	cmd.exe
PID 2140 wrote to memory of 672	2140	Classes:bin	cmd.exe
PID 2140 wrote to memory of 672	2140	Classes:bin	cmd.exe
PID 2016 wrote to memory of 640	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	cmd.exe
PID 2016 wrote to memory of 640	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	cmd.exe
PID 2016 wrote to memory of 640	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	cmd.exe
PID 672 wrote to memory of 932	672	cmd.exe	choice.exe
PID 672 wrote to memory of 932	672	cmd.exe	choice.exe
PID 672 wrote to memory of 932	672	cmd.exe	choice.exe
PID 640 wrote to memory of 1348	640	cmd.exe	choice.exe
PID 640 wrote to memory of 1348	640	cmd.exe	choice.exe
PID 640 wrote to memory of 1348	640	cmd.exe	choice.exe
PID 3924 wrote to memory of 3788	3924	cmd.exe	attrib.exe
PID 3924 wrote to memory of 3788	3924	cmd.exe	attrib.exe
PID 3924 wrote to memory of 3788	3924	cmd.exe	attrib.exe
PID 640 wrote to memory of 1412	640	cmd.exe	attrib.exe
PID 640 wrote to memory of 1412	640	cmd.exe	attrib.exe
PID 640 wrote to memory of 1412	640	cmd.exe	attrib.exe
PID 672 wrote to memory of 2124	672	cmd.exe	attrib.exe
PID 672 wrote to memory of 2124	672	cmd.exe	attrib.exe
PID 672 wrote to memory of 2124	672	cmd.exe	attrib.exe

C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe
"C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:2016

C:\Users\Admin\AppData\Roaming\Classes:bin
C:\Users\Admin\AppData\Roaming\Classes:bin -r
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2140

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:2772

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /F C:\Windows\system32\Classes.exe
3⤵
- Modifies file permissions
- Possible privilege escalation attempt
PID:3612

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\Classes.exe /reset
3⤵
- Modifies file permissions
- Possible privilege escalation attempt
PID:3856

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Classes" & del "C:\Users\Admin\AppData\Roaming\Classes"
3⤵
- Suspicious use of WriteProcessMemory
PID:672

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:932

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Classes"
4⤵
- Views/modifies file attributes
PID:2124

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe" & del "C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:640

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:1348

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe"
3⤵
- Views/modifies file attributes
PID:1412

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
- Modifies service
PID:3188

C:\Windows\SysWOW64\Classes.exe
C:\Windows\SysWOW64\Classes.exe -s
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3948

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Classes.exe" & del "C:\Windows\SysWOW64\Classes.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3924

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:724

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Windows\SysWOW64\Classes.exe"
3⤵
- Views/modifies file attributes
- Drops file in System32 directory
PID:3788