luminosity | 41028718b81c51998d11be05e664fae1e2f80ca76b4936a46736c5f7b712b13b

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09-03-2024 20:23

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General

Target

bcb88f34917a59dbc6795b620dd798df.exe
Size

220KB
MD5

bcb88f34917a59dbc6795b620dd798df
SHA1

6c3e9f9bd3b5d42210e0b368ef5b2b97a01679a0
SHA256

41028718b81c51998d11be05e664fae1e2f80ca76b4936a46736c5f7b712b13b
SHA512

4cf64f890e534ae58b5a70a2aaaaf0afe86269ec1b6e3ef481c5da93ed5b28c2a12899b43deea740eaadf07e296b96f0141df45e085c6c42b270595de6773ac2
SSDEEP

3072:v/uybjWFAN44SHX4ty3IP25Ll40TV81RxwLRMcR9aBeWvfxLWDwCeWJ2NJ2RD1cy:vmA22S314WZOmLbR9JWJW7JYJK1

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

T1547.004

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\""	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\ProgramData\\861237\\rundll32.exe\""	rundll32.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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	bcb88f34917a59dbc6795b620dd798df.exe

Executes dropped EXE 1 IoCs

pid	Process
4548	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\System32 = "\"C:\\ProgramData\\861237\\rundll32.exe\""	rundll32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\clientsvr.exe	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\clientsvr.exe	rundll32.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
2084	bcb88f34917a59dbc6795b620dd798df.exe
2084	bcb88f34917a59dbc6795b620dd798df.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe
4548	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2084	bcb88f34917a59dbc6795b620dd798df.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4548	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4548	rundll32.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 4548	2084	bcb88f34917a59dbc6795b620dd798df.exe	91
PID 2084 wrote to memory of 4548	2084	bcb88f34917a59dbc6795b620dd798df.exe	91
PID 2084 wrote to memory of 4548	2084	bcb88f34917a59dbc6795b620dd798df.exe	91
PID 4548 wrote to memory of 2084	4548	rundll32.exe	87
PID 4548 wrote to memory of 2084	4548	rundll32.exe	87
PID 4548 wrote to memory of 2084	4548	rundll32.exe	87
PID 4548 wrote to memory of 2084	4548	rundll32.exe	87
PID 4548 wrote to memory of 2084	4548	rundll32.exe	87

C:\Users\Admin\AppData\Local\Temp\bcb88f34917a59dbc6795b620dd798df.exe
"C:\Users\Admin\AppData\Local\Temp\bcb88f34917a59dbc6795b620dd798df.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:2084
- C:\ProgramData\861237\rundll32.exe
  "C:\ProgramData\861237\rundll32.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:4548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\861237\rundll32.exe

Filesize
220KB

MD5
bcb88f34917a59dbc6795b620dd798df

SHA1
6c3e9f9bd3b5d42210e0b368ef5b2b97a01679a0

SHA256
41028718b81c51998d11be05e664fae1e2f80ca76b4936a46736c5f7b712b13b

SHA512
4cf64f890e534ae58b5a70a2aaaaf0afe86269ec1b6e3ef481c5da93ed5b28c2a12899b43deea740eaadf07e296b96f0141df45e085c6c42b270595de6773ac2

Download Submit
memory/2084-24-0x0000000077842000-0x0000000077843000-memory.dmp

Filesize
4KB

Download
memory/2084-26-0x0000000001020000-0x0000000001030000-memory.dmp

Filesize
64KB

Download
memory/2084-21-0x0000000006900000-0x0000000006901000-memory.dmp

Filesize
4KB

Download
memory/2084-22-0x00000000068E0000-0x00000000068F7000-memory.dmp

Filesize
92KB

Download
memory/2084-20-0x00000000068E0000-0x00000000068F7000-memory.dmp

Filesize
92KB

Download
memory/2084-30-0x00000000068E0000-0x00000000068F7000-memory.dmp

Filesize
92KB

Download
memory/2084-18-0x00000000068E0000-0x00000000068F7000-memory.dmp

Filesize
92KB

Download
memory/2084-19-0x00000000068E0000-0x00000000068F7000-memory.dmp

Filesize
92KB

Download
memory/2084-31-0x0000000074F20000-0x00000000754D1000-memory.dmp

Filesize
5.7MB

Download
memory/2084-1-0x0000000074F20000-0x00000000754D1000-memory.dmp

Filesize
5.7MB

Download
memory/2084-2-0x0000000001020000-0x0000000001030000-memory.dmp

Filesize
64KB

Download
memory/2084-0-0x0000000074F20000-0x00000000754D1000-memory.dmp

Filesize
5.7MB

Download
memory/2084-25-0x0000000074F20000-0x00000000754D1000-memory.dmp

Filesize
5.7MB

Download
memory/4548-13-0x0000000074F20000-0x00000000754D1000-memory.dmp

Filesize
5.7MB

Download
memory/4548-27-0x0000000074F20000-0x00000000754D1000-memory.dmp

Filesize
5.7MB

Download
memory/4548-28-0x0000000003010000-0x0000000003020000-memory.dmp

Filesize
64KB

Download
memory/4548-15-0x0000000074F20000-0x00000000754D1000-memory.dmp

Filesize
5.7MB

Download
memory/4548-14-0x0000000003010000-0x0000000003020000-memory.dmp

Filesize
64KB

Download