luminosity | f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11

Analysis

max time kernel
152s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
27-11-2022 18:22

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General

Target

f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe
Size

349KB
MD5

60eec175da96472e274f381336f2e953
SHA1

3bf49fe29e8a17070594ab1df37d36c7d605576a
SHA256

f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11
SHA512

3715091d4beb2e3903f4f5e2a37366d0c0d55e88d2aba78f4000d348fc31ef7936a9092fb716e8af10bcd9932b940e931a667f6cf8244ac7bfe9d8e34e519549
SSDEEP

6144:/v+2p5fGOmQ2lBZnUnoJHwGYb3XFNCSbLnTZYJFpiNX85pRpp99k9T9s9s9:H+2p5pmQg5U6HCB5bzOFwd2pRpp99k9l

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\""	csrss.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\\950199\\csrss.exe\""	csrss.exe

Executes dropped EXE 2 IoCs

pid	Process
3572	csrss.exe
5040	csrss.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	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.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\Client Services Runtime Service = "\"C:\\ProgramData\\950199\\csrss.exe\""	csrss.exe

Drops file in System32 directory 2 IoCs

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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4980 set thread context of 2108	4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	83
PID 3572 set thread context of 5040	3572	csrss.exe	87

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
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
2108	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe
2108	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe
4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe
5040	csrss.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2108	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe
Token: SeDebugPrivilege	3572	csrss.exe
Token: SeDebugPrivilege	5040	csrss.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5040	csrss.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 4980 wrote to memory of 2108	4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	83
PID 4980 wrote to memory of 2108	4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	83
PID 4980 wrote to memory of 2108	4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	83
PID 4980 wrote to memory of 2108	4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	83
PID 4980 wrote to memory of 2108	4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	83
PID 4980 wrote to memory of 2108	4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	83
PID 4980 wrote to memory of 2108	4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	83
PID 4980 wrote to memory of 2108	4980	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	83
PID 2108 wrote to memory of 3572	2108	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	84
PID 2108 wrote to memory of 3572	2108	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	84
PID 2108 wrote to memory of 3572	2108	f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe	84
PID 3572 wrote to memory of 5040	3572	csrss.exe	87
PID 3572 wrote to memory of 5040	3572	csrss.exe	87
PID 3572 wrote to memory of 5040	3572	csrss.exe	87
PID 3572 wrote to memory of 5040	3572	csrss.exe	87
PID 3572 wrote to memory of 5040	3572	csrss.exe	87
PID 3572 wrote to memory of 5040	3572	csrss.exe	87
PID 3572 wrote to memory of 5040	3572	csrss.exe	87
PID 3572 wrote to memory of 5040	3572	csrss.exe	87
PID 5040 wrote to memory of 2108	5040	csrss.exe	83
PID 5040 wrote to memory of 2108	5040	csrss.exe	83
PID 5040 wrote to memory of 2108	5040	csrss.exe	83
PID 5040 wrote to memory of 2108	5040	csrss.exe	83
PID 5040 wrote to memory of 2108	5040	csrss.exe	83
PID 5040 wrote to memory of 4980	5040	csrss.exe	81
PID 5040 wrote to memory of 4980	5040	csrss.exe	81
PID 5040 wrote to memory of 4980	5040	csrss.exe	81
PID 5040 wrote to memory of 4980	5040	csrss.exe	81
PID 5040 wrote to memory of 4980	5040	csrss.exe	81

C:\Users\Admin\AppData\Local\Temp\f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe
"C:\Users\Admin\AppData\Local\Temp\f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4980
- C:\Users\Admin\AppData\Local\Temp\f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe
  "C:\Users\Admin\AppData\Local\Temp\f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11.exe"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of WriteProcessMemory
  PID:2108
- - C:\ProgramData\950199\csrss.exe
    "C:\ProgramData\950199\csrss.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3572
  - - C:\ProgramData\950199\csrss.exe
      "C:\ProgramData\950199\csrss.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:5040

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\950199\csrss.exe

Filesize
349KB

MD5
60eec175da96472e274f381336f2e953

SHA1
3bf49fe29e8a17070594ab1df37d36c7d605576a

SHA256
f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11

SHA512
3715091d4beb2e3903f4f5e2a37366d0c0d55e88d2aba78f4000d348fc31ef7936a9092fb716e8af10bcd9932b940e931a667f6cf8244ac7bfe9d8e34e519549

Download Submit
C:\ProgramData\950199\csrss.exe

Filesize
349KB

MD5
60eec175da96472e274f381336f2e953

SHA1
3bf49fe29e8a17070594ab1df37d36c7d605576a

SHA256
f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11

SHA512
3715091d4beb2e3903f4f5e2a37366d0c0d55e88d2aba78f4000d348fc31ef7936a9092fb716e8af10bcd9932b940e931a667f6cf8244ac7bfe9d8e34e519549

Download Submit
C:\ProgramData\950199\csrss.exe

Filesize
349KB

MD5
60eec175da96472e274f381336f2e953

SHA1
3bf49fe29e8a17070594ab1df37d36c7d605576a

SHA256
f00480b1d8e9b860b77fc5fb64c5ecc3cde8ae3bfe8aa9bbdabe57da5633bc11

SHA512
3715091d4beb2e3903f4f5e2a37366d0c0d55e88d2aba78f4000d348fc31ef7936a9092fb716e8af10bcd9932b940e931a667f6cf8244ac7bfe9d8e34e519549

Download Submit
memory/2108-154-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/2108-135-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2108-136-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/2108-148-0x00000000073D0000-0x00000000073E7000-memory.dmp

Filesize
92KB

Download
memory/2108-149-0x00000000073D0000-0x00000000073E7000-memory.dmp

Filesize
92KB

Download
memory/2108-141-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/2108-147-0x00000000073D0000-0x00000000073E7000-memory.dmp

Filesize
92KB

Download
memory/3572-142-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/3572-140-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/4980-132-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/4980-150-0x0000000007250000-0x0000000007267000-memory.dmp

Filesize
92KB

Download
memory/4980-152-0x0000000007250000-0x0000000007267000-memory.dmp

Filesize
92KB

Download
memory/4980-151-0x0000000007250000-0x0000000007267000-memory.dmp

Filesize
92KB

Download
memory/4980-133-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/5040-146-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/5040-153-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download