a673316d048b600b1b9a36f2cb44d1ebd1ad775858c0b231bacd71d0c23d6d59

General

Target

encryptor.exe
Size

766KB
MD5

400fa5d02c1ac704cd290d959b725e67
SHA1

456e5cb1739cb5f29020d1a692289a5af07ce90d
SHA256

dc563953f845fb88c6375b3e9311ebed49ce4bcd613f7044989304c8de384dac
SHA512

0240c6608931d975aa45e2a2c76ea43d311fd4660c091510197e30e65ccb69002e47006d1656abc71425186b3c7823881ae56ea39500afaef0fc4b5094b384ad
SSDEEP

12288:aH3fcbXX/qkpwGarA0iKKjk/1RobRWGDmEd7nLTzGnabKJiM:aH3fcbXX9pwGarA0iKj/1RCWGDmIHQpX

Score

9^/10

ransomware

Malware Config

Signatures

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Modifies extensions of user files 2 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

encryptor.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\ProtectRegister.crw => C:\Users\Admin\Pictures\ProtectRegister.crwxxyyzzr	encryptor.exe
File opened for modification	C:\Users\Admin\Pictures\ProtectRegister.crwxxyyzzr	encryptor.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

Processes:

encryptor.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	encryptor.exe

Enumerates connected drives 3 TTPs 25 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

encryptor.exe

description	ioc	process
File opened (read-only)	\??\J:	encryptor.exe
File opened (read-only)	\??\B:	encryptor.exe
File opened (read-only)	\??\Q:	encryptor.exe
File opened (read-only)	\??\M:	encryptor.exe
File opened (read-only)	\??\T:	encryptor.exe
File opened (read-only)	\??\O:	encryptor.exe
File opened (read-only)	\??\F:	encryptor.exe
File opened (read-only)	\??\X:	encryptor.exe
File opened (read-only)	\??\W:	encryptor.exe
File opened (read-only)	\??\N:	encryptor.exe
File opened (read-only)	\??\H:	encryptor.exe
File opened (read-only)	\??\D:	encryptor.exe
File opened (read-only)	\??\U:	encryptor.exe
File opened (read-only)	\??\R:	encryptor.exe
File opened (read-only)	\??\V:	encryptor.exe
File opened (read-only)	\??\S:	encryptor.exe
File opened (read-only)	\??\P:	encryptor.exe
File opened (read-only)	\??\L:	encryptor.exe
File opened (read-only)	\??\K:	encryptor.exe
File opened (read-only)	\??\I:	encryptor.exe
File opened (read-only)	\??\Z:	encryptor.exe
File opened (read-only)	\??\Y:	encryptor.exe
File opened (read-only)	\??\A:	encryptor.exe
File opened (read-only)	\??\G:	encryptor.exe
File opened (read-only)	\??\E:	encryptor.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
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

2032 vssadmin.exe

pid	process
2032	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

encryptor.exe

pid	process
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe
4492	encryptor.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

encryptor.exevssvc.exe

description	pid	process
Token: SeAssignPrimaryTokenPrivilege	4492	encryptor.exe
Token: SeBackupPrivilege	3912	vssvc.exe
Token: SeRestorePrivilege	3912	vssvc.exe
Token: SeAuditPrivilege	3912	vssvc.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

encryptor.execmd.exe

description	pid	process	target process
PID 4492 wrote to memory of 2036	4492	encryptor.exe	cmd.exe
PID 4492 wrote to memory of 2036	4492	encryptor.exe	cmd.exe
PID 2036 wrote to memory of 2032	2036	cmd.exe	vssadmin.exe
PID 2036 wrote to memory of 2032	2036	cmd.exe	vssadmin.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\encryptor.exe
"C:\Users\Admin\AppData\Local\Temp\encryptor.exe"
1⤵
- Modifies extensions of user files
- Checks computer location settings
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4492

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:2036