luminosity | 66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f

Analysis

max time kernel
166s
max time network
176s
platform
windows10_x64
resource
win10-en-20211208
submitted
29-01-2022 22:48

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General

Target

66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe
Size

306KB
MD5

6cdbe9944dc0f99bd89379b5bb715ddc
SHA1

75cc7159ba568fb936354473c70c338e37f1a55c
SHA256

66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f
SHA512

fe42b09547596be9c621abb27b9c930046d2c56f7d9a924560f3c65142ca4ceaef3c0a110e2fa19bbb4c9e7a02e712edb49c4796dafa4dac23f9bf8c9cb1e6ed

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\USER\S-1-5-21-369956170-74428499-1628131376-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\ProgramData\\395351\\RezohSkypeToolV2.exe\""	RezohSkypeToolV2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,\"C:\\Windows\\system32\\clientsvr.exe\""	RezohSkypeToolV2.exe

Executes dropped EXE 3 IoCs

pid	Process
4352	RezohSkypeToolV2.exe
4412	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce	RezohSkypeToolV2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\RezohSkypeToolV2 = "\"C:\\ProgramData\\395351\\RezohSkypeToolV2.exe\""	RezohSkypeToolV2.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\clientsvr.exe	RezohSkypeToolV2.exe
File opened for modification	C:\Windows\SysWOW64\clientsvr.exe	RezohSkypeToolV2.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3544 set thread context of 3500	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	69
PID 3544 set thread context of 4092	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	68
PID 4352 set thread context of 4408	4352	RezohSkypeToolV2.exe	73
PID 4352 set thread context of 4412	4352	RezohSkypeToolV2.exe	72

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
3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe
3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe
4352	RezohSkypeToolV2.exe
4352	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
3500	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe
3500	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe
4408	RezohSkypeToolV2.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3500	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe
Token: SeDebugPrivilege	4352	RezohSkypeToolV2.exe
Token: SeDebugPrivilege	4408	RezohSkypeToolV2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4408	RezohSkypeToolV2.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3544 wrote to memory of 4092	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	68
PID 3544 wrote to memory of 4092	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	68
PID 3544 wrote to memory of 4092	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	68
PID 3544 wrote to memory of 3500	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	69
PID 3544 wrote to memory of 3500	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	69
PID 3544 wrote to memory of 3500	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	69
PID 3544 wrote to memory of 3500	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	69
PID 3544 wrote to memory of 3500	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	69
PID 3544 wrote to memory of 3500	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	69
PID 3544 wrote to memory of 3500	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	69
PID 3544 wrote to memory of 3500	3544	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	69
PID 3500 wrote to memory of 4352	3500	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	71
PID 3500 wrote to memory of 4352	3500	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	71
PID 3500 wrote to memory of 4352	3500	66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe	71
PID 4352 wrote to memory of 4412	4352	RezohSkypeToolV2.exe	72
PID 4352 wrote to memory of 4412	4352	RezohSkypeToolV2.exe	72
PID 4352 wrote to memory of 4412	4352	RezohSkypeToolV2.exe	72
PID 4352 wrote to memory of 4408	4352	RezohSkypeToolV2.exe	73
PID 4352 wrote to memory of 4408	4352	RezohSkypeToolV2.exe	73
PID 4352 wrote to memory of 4408	4352	RezohSkypeToolV2.exe	73
PID 4352 wrote to memory of 4408	4352	RezohSkypeToolV2.exe	73
PID 4352 wrote to memory of 4408	4352	RezohSkypeToolV2.exe	73
PID 4352 wrote to memory of 4408	4352	RezohSkypeToolV2.exe	73
PID 4352 wrote to memory of 4408	4352	RezohSkypeToolV2.exe	73
PID 4352 wrote to memory of 4408	4352	RezohSkypeToolV2.exe	73
PID 4408 wrote to memory of 3500	4408	RezohSkypeToolV2.exe	69
PID 4408 wrote to memory of 3500	4408	RezohSkypeToolV2.exe	69
PID 4408 wrote to memory of 3500	4408	RezohSkypeToolV2.exe	69
PID 4408 wrote to memory of 3500	4408	RezohSkypeToolV2.exe	69
PID 4408 wrote to memory of 3500	4408	RezohSkypeToolV2.exe	69

C:\Users\Admin\AppData\Local\Temp\66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe
"C:\Users\Admin\AppData\Local\Temp\66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3544
- C:\Users\Admin\AppData\Local\Temp\66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe
  "C:\Users\Admin\AppData\Local\Temp\66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe"
  2⤵
  PID:4092
- C:\Users\Admin\AppData\Local\Temp\66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe
  "C:\Users\Admin\AppData\Local\Temp\66fcf7b770ca9f62f18c4c30e3d4597b9ba86091d737abb4f83acfd31ed81f4f.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of WriteProcessMemory
  PID:3500
- - C:\ProgramData\395351\RezohSkypeToolV2.exe
    "C:\ProgramData\395351\RezohSkypeToolV2.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4352
  - - C:\ProgramData\395351\RezohSkypeToolV2.exe
      "C:\ProgramData\395351\RezohSkypeToolV2.exe"
      4⤵
      Executes dropped EXE
      PID:4412
  - - C:\ProgramData\395351\RezohSkypeToolV2.exe
      "C:\ProgramData\395351\RezohSkypeToolV2.exe"
      4⤵
      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:4408

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3500-119-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/3500-121-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/3500-124-0x00000000030E0000-0x00000000030E1000-memory.dmp

Filesize
4KB

Download
memory/3500-135-0x0000000007110000-0x0000000007111000-memory.dmp

Filesize
4KB

Download
memory/3544-118-0x00000000006C0000-0x00000000006C1000-memory.dmp

Filesize
4KB

Download
memory/4408-134-0x0000000002C20000-0x0000000002C21000-memory.dmp

Filesize
4KB

Download