luminosity | 7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e

General

Target

7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe
Size

193KB
MD5

d26216b074c217894eb57c1413983c17
SHA1

1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79
SHA256

7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e
SHA512

19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5
SSDEEP

3072:PGfeC5RmS3LGpjPBX28Vz7Mj7eQnyzu5/1RXHHaDXqV3Td+SAU19sbh:PGfhmS3LejZ2KvOeNaXnxQUb

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\""	csrd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\ProgramData\\954820\\csrd.exe\""	csrd.exe

Executes dropped EXE 2 IoCs

pid	Process
4692	csrd.exe
1784	csrd.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.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-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\csrdLink = "\"C:\\ProgramData\\954820\\csrd.exe\""	csrd.exe

Drops file in System32 directory 2 IoCs

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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1748 set thread context of 3664	1748	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	84
PID 4692 set thread context of 1784	4692	csrd.exe	86

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

System Information Discovery
T1082

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3664	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1748	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe
Token: SeDebugPrivilege	4692	csrd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1784	csrd.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1748 wrote to memory of 3664	1748	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	84
PID 1748 wrote to memory of 3664	1748	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	84
PID 1748 wrote to memory of 3664	1748	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	84
PID 1748 wrote to memory of 3664	1748	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	84
PID 1748 wrote to memory of 3664	1748	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	84
PID 1748 wrote to memory of 3664	1748	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	84
PID 1748 wrote to memory of 3664	1748	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	84
PID 1748 wrote to memory of 3664	1748	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	84
PID 3664 wrote to memory of 4692	3664	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	85
PID 3664 wrote to memory of 4692	3664	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	85
PID 3664 wrote to memory of 4692	3664	7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe	85
PID 4692 wrote to memory of 1784	4692	csrd.exe	86
PID 4692 wrote to memory of 1784	4692	csrd.exe	86
PID 4692 wrote to memory of 1784	4692	csrd.exe	86
PID 4692 wrote to memory of 1784	4692	csrd.exe	86
PID 4692 wrote to memory of 1784	4692	csrd.exe	86
PID 4692 wrote to memory of 1784	4692	csrd.exe	86
PID 4692 wrote to memory of 1784	4692	csrd.exe	86
PID 4692 wrote to memory of 1784	4692	csrd.exe	86

C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe
"C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe
  "C:\Users\Admin\AppData\Local\Temp\7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e.exe"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: RenamesItself
  - Suspicious use of WriteProcessMemory
  PID:3664
- - C:\ProgramData\954820\csrd.exe
    "C:\ProgramData\954820\csrd.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4692
  - - C:\ProgramData\954820\csrd.exe
      "C:\ProgramData\954820\csrd.exe"
      4⤵
      Modifies WinLogon for persistence
      Executes dropped EXE
      Adds Run key to start application
      Drops file in System32 directory
      Suspicious use of SetWindowsHookEx
      PID:1784

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\954820\csrd.exe

Filesize
193KB

MD5
d26216b074c217894eb57c1413983c17

SHA1
1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79

SHA256
7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e

SHA512
19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5

Download Submit
C:\ProgramData\954820\csrd.exe

Filesize
193KB

MD5
d26216b074c217894eb57c1413983c17

SHA1
1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79

SHA256
7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e

SHA512
19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5

Download Submit
C:\ProgramData\954820\csrd.exe

Filesize
193KB

MD5
d26216b074c217894eb57c1413983c17

SHA1
1dd2b4b7dc841f4bdc2e45b4485670f8fd107c79

SHA256
7b8255fb2333e7a24017fb75314f56f946b15220ee6815f2444ee867c25e7d1e

SHA512
19cc79de139fdcc01c9cebd61af2619f63b1606d3308cc25e9ac7e368fead021467136b7e3cf27dd18e81052ec66dc523f5e5ae3320002f03aa8213d9990e8a5

Download Submit
memory/1748-133-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/1748-132-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/1784-147-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/1784-146-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/3664-136-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/3664-141-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/3664-135-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/3664-148-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/4692-142-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download
memory/4692-140-0x00000000753F0000-0x00000000759A1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads