f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415

General

Target

f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exe
Size

329KB
MD5

2927cfa58259da34494ae3445107a372
SHA1

3b6ef88d46c09541b3dc5e89aac4dd5602d45d81
SHA256

f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415
SHA512

e1f5522dda3af9c0caa2c4a5c62880fec5c183f70704988eaec933319a5f89797415fd9baec97a7718986a8d180e42f6e3b6fa96339514cbafd2c71742a11de4
SSDEEP

6144:hy+o4AwgO9JhQONF+d3ev+tNB3xfjoUlDLJDU7W8N6UlE:hy+tP9JvNG3ev+tNB3x

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

winlogon.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe"	winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe"	winlogon.exe

Executes dropped EXE 2 IoCs

Processes:

winlogon.exeserver.exe

pid process

2032 winlogon.exe
692 server.exe

pid	process
2032	winlogon.exe
692	server.exe

Loads dropped DLL 4 IoCs

Processes:

f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exewinlogon.exe

pid	process
240	f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exe
240	f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exe
2032	winlogon.exe
2032	winlogon.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exewinlogon.exe

description	pid	process
Token: SeDebugPrivilege	240	f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exe
Token: SeDebugPrivilege	2032	winlogon.exe
Token: SeDebugPrivilege	2032	winlogon.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exewinlogon.exe

description	pid	process	target process
PID 240 wrote to memory of 2032	240	f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exe	winlogon.exe
PID 240 wrote to memory of 2032	240	f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exe	winlogon.exe
PID 240 wrote to memory of 2032	240	f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exe	winlogon.exe
PID 240 wrote to memory of 2032	240	f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exe	winlogon.exe
PID 2032 wrote to memory of 692	2032	winlogon.exe	server.exe
PID 2032 wrote to memory of 692	2032	winlogon.exe	server.exe
PID 2032 wrote to memory of 692	2032	winlogon.exe	server.exe
PID 2032 wrote to memory of 692	2032	winlogon.exe	server.exe

C:\Users\Admin\AppData\Local\Temp\f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exe
"C:\Users\Admin\AppData\Local\Temp\f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415.exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:240

C:\Users\Admin\AppData\Roaming\winlogon.exe
"C:\Users\Admin\AppData\Roaming\winlogon.exe"
2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032

C:\Users\Admin\AppData\Roaming\server.exe
"C:\Users\Admin\AppData\Roaming\server.exe"
3⤵
- Executes dropped EXE
PID:692

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\server.exe
Filesize
329KB

MD5
2927cfa58259da34494ae3445107a372

SHA1
3b6ef88d46c09541b3dc5e89aac4dd5602d45d81

SHA256
f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415

SHA512
e1f5522dda3af9c0caa2c4a5c62880fec5c183f70704988eaec933319a5f89797415fd9baec97a7718986a8d180e42f6e3b6fa96339514cbafd2c71742a11de4

Download Submit
C:\Users\Admin\AppData\Roaming\winlogon.exe
Filesize
329KB

MD5
2927cfa58259da34494ae3445107a372

SHA1
3b6ef88d46c09541b3dc5e89aac4dd5602d45d81

SHA256
f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415

SHA512
e1f5522dda3af9c0caa2c4a5c62880fec5c183f70704988eaec933319a5f89797415fd9baec97a7718986a8d180e42f6e3b6fa96339514cbafd2c71742a11de4

Download Submit
C:\Users\Admin\AppData\Roaming\winlogon.exe
Filesize
329KB

MD5
2927cfa58259da34494ae3445107a372

SHA1
3b6ef88d46c09541b3dc5e89aac4dd5602d45d81

SHA256
f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415

SHA512
e1f5522dda3af9c0caa2c4a5c62880fec5c183f70704988eaec933319a5f89797415fd9baec97a7718986a8d180e42f6e3b6fa96339514cbafd2c71742a11de4

Download Submit
\Users\Admin\AppData\Roaming\server.exe
Filesize
329KB

MD5
2927cfa58259da34494ae3445107a372

SHA1
3b6ef88d46c09541b3dc5e89aac4dd5602d45d81

SHA256
f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415

SHA512
e1f5522dda3af9c0caa2c4a5c62880fec5c183f70704988eaec933319a5f89797415fd9baec97a7718986a8d180e42f6e3b6fa96339514cbafd2c71742a11de4

Download Submit
\Users\Admin\AppData\Roaming\server.exe
Filesize
329KB

MD5
2927cfa58259da34494ae3445107a372

SHA1
3b6ef88d46c09541b3dc5e89aac4dd5602d45d81

SHA256
f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415

SHA512
e1f5522dda3af9c0caa2c4a5c62880fec5c183f70704988eaec933319a5f89797415fd9baec97a7718986a8d180e42f6e3b6fa96339514cbafd2c71742a11de4

Download Submit
\Users\Admin\AppData\Roaming\winlogon.exe
Filesize
329KB

MD5
2927cfa58259da34494ae3445107a372

SHA1
3b6ef88d46c09541b3dc5e89aac4dd5602d45d81

SHA256
f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415

SHA512
e1f5522dda3af9c0caa2c4a5c62880fec5c183f70704988eaec933319a5f89797415fd9baec97a7718986a8d180e42f6e3b6fa96339514cbafd2c71742a11de4

Download Submit
\Users\Admin\AppData\Roaming\winlogon.exe
Filesize
329KB

MD5
2927cfa58259da34494ae3445107a372

SHA1
3b6ef88d46c09541b3dc5e89aac4dd5602d45d81

SHA256
f6d21661b97d9aef334cdeba7fec3e348b9f35e5a10b36d92896795796ce9415

SHA512
e1f5522dda3af9c0caa2c4a5c62880fec5c183f70704988eaec933319a5f89797415fd9baec97a7718986a8d180e42f6e3b6fa96339514cbafd2c71742a11de4

Download Submit
memory/240-63-0x00000000742E0000-0x000000007488B000-memory.dmp

Filesize
5.7MB

Download
memory/240-54-0x00000000753C1000-0x00000000753C3000-memory.dmp

Filesize
8KB

Download
memory/240-56-0x00000000742E0000-0x000000007488B000-memory.dmp

Filesize
5.7MB

Download
memory/240-55-0x00000000742E0000-0x000000007488B000-memory.dmp

Filesize
5.7MB

Download
memory/692-68-0x0000000000000000-mapping.dmp

Download
memory/2032-59-0x0000000000000000-mapping.dmp

Download
memory/2032-64-0x00000000742E0000-0x000000007488B000-memory.dmp

Filesize
5.7MB

Download
memory/2032-65-0x00000000742E0000-0x000000007488B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads