luminosity | 82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
29-10-2022 06:09

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General

Target

82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110.exe
Size

222KB
MD5

7d31c5bae564a40de802cc01c4f53b17
SHA1

fea43a3a19fbd0024c7b09b575f0f7e14fbeb790
SHA256

82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110
SHA512

ec194b90dbdf610e338139cb84961ea1fb46cbff5a4132125d9041b9559e054c74b37889f550769d8910f34cf95a8ae0826c8b591bf99932b45a584bcf82781f
SSDEEP

3072:8U4f+fkjZt7fF0L2vMCDiu0Y8RxwLRMcR9aBeWvfxLWDwUeWJ2NJucbPvJ1nlYZC:81i+f3uBmLbR9JWJWdJYJuEvPr

Score

10^/10

luminosity persistence rat

Malware Config

Signatures

Luminosity
Luminosity is a RAT family that was on sale, while claiming to be a system administration utility.
rat luminosity

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,\"C:\\Windows\\system32\\clientsvr.exe\""	client.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\ProgramData\\639718\\client.exe\""	client.exe

Executes dropped EXE 1 IoCs

pid	Process
32	client.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Luminosity Client = "\"C:\\ProgramData\\639718\\client.exe\""	client.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\clientsvr.exe	client.exe
File opened for modification	C:\Windows\SysWOW64\clientsvr.exe	client.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
4584	82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110.exe
4584	82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe
32	client.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4584	82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	32	client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
32	client.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4584 wrote to memory of 32	4584	82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110.exe	86
PID 4584 wrote to memory of 32	4584	82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110.exe	86
PID 4584 wrote to memory of 32	4584	82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110.exe	86
PID 32 wrote to memory of 4584	32	client.exe	81
PID 32 wrote to memory of 4584	32	client.exe	81
PID 32 wrote to memory of 4584	32	client.exe	81
PID 32 wrote to memory of 4584	32	client.exe	81
PID 32 wrote to memory of 4584	32	client.exe	81

C:\Users\Admin\AppData\Local\Temp\82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110.exe
"C:\Users\Admin\AppData\Local\Temp\82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:4584
- C:\ProgramData\639718\client.exe
  "C:\ProgramData\639718\client.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:32

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\639718\client.exe

Filesize
222KB

MD5
7d31c5bae564a40de802cc01c4f53b17

SHA1
fea43a3a19fbd0024c7b09b575f0f7e14fbeb790

SHA256
82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110

SHA512
ec194b90dbdf610e338139cb84961ea1fb46cbff5a4132125d9041b9559e054c74b37889f550769d8910f34cf95a8ae0826c8b591bf99932b45a584bcf82781f

Download Submit
C:\ProgramData\639718\client.exe

Filesize
222KB

MD5
7d31c5bae564a40de802cc01c4f53b17

SHA1
fea43a3a19fbd0024c7b09b575f0f7e14fbeb790

SHA256
82fb7cce94762a644bc7e320b1bde14f693c7e16624a84592f6ea8b519d0c110

SHA512
ec194b90dbdf610e338139cb84961ea1fb46cbff5a4132125d9041b9559e054c74b37889f550769d8910f34cf95a8ae0826c8b591bf99932b45a584bcf82781f

Download Submit
memory/32-136-0x0000000074890000-0x0000000074E41000-memory.dmp

Filesize
5.7MB

Download
memory/32-138-0x0000000074890000-0x0000000074E41000-memory.dmp

Filesize
5.7MB

Download
memory/4584-132-0x0000000074890000-0x0000000074E41000-memory.dmp

Filesize
5.7MB

Download
memory/4584-137-0x0000000074890000-0x0000000074E41000-memory.dmp

Filesize
5.7MB

Download
memory/4584-139-0x0000000007170000-0x0000000007187000-memory.dmp

Filesize
92KB

Download
memory/4584-140-0x0000000007170000-0x0000000007187000-memory.dmp

Filesize
92KB

Download
memory/4584-141-0x0000000007170000-0x0000000007187000-memory.dmp

Filesize
92KB

Download
memory/4584-142-0x0000000074890000-0x0000000074E41000-memory.dmp

Filesize
5.7MB

Download