luminosity | 257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d

Analysis

max time kernel
153s
max time network
178s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
26-11-2022 18:01

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General

Target

257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe
Size

258KB
MD5

220e4be9f75f1a8ed6091702fc0b7fe5
SHA1

4cae4f91647f96474eecd5e186a63e5d8451a11e
SHA256

257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d
SHA512

177bb7ae8e5e61cebdac28917e19afb053b3d77c408c12fe4bb6d91ab1eeef356c495f8da100c541052459b45f4dd32f00bfbd642925b57042e3e1e99c42bd22
SSDEEP

6144:95FgsZZ+c7PQBpWHiyu8Qu+tsrnFr9Ha4S9mhJMJAPMDmp:90s2BwHifXirFJa0hEAUDy

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\""	helper.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\\514248\\helper.exe\""	helper.exe

Executes dropped EXE 2 IoCs

pid	Process
5012	helper.exe
3760	helper.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	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.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\Computer Helper = "\"C:\\ProgramData\\514248\\helper.exe\""	helper.exe

Drops file in System32 directory 2 IoCs

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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1684 set thread context of 1400	1684	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	85
PID 5012 set thread context of 3760	5012	helper.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
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe
3760	helper.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1400	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3760	helper.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3760	helper.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1684 wrote to memory of 1400	1684	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	85
PID 1684 wrote to memory of 1400	1684	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	85
PID 1684 wrote to memory of 1400	1684	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	85
PID 1684 wrote to memory of 1400	1684	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	85
PID 1684 wrote to memory of 1400	1684	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	85
PID 1684 wrote to memory of 1400	1684	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	85
PID 1684 wrote to memory of 1400	1684	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	85
PID 1684 wrote to memory of 1400	1684	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	85
PID 1400 wrote to memory of 5012	1400	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	86
PID 1400 wrote to memory of 5012	1400	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	86
PID 1400 wrote to memory of 5012	1400	257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe	86
PID 5012 wrote to memory of 3760	5012	helper.exe	87
PID 5012 wrote to memory of 3760	5012	helper.exe	87
PID 5012 wrote to memory of 3760	5012	helper.exe	87
PID 5012 wrote to memory of 3760	5012	helper.exe	87
PID 5012 wrote to memory of 3760	5012	helper.exe	87
PID 5012 wrote to memory of 3760	5012	helper.exe	87
PID 5012 wrote to memory of 3760	5012	helper.exe	87
PID 5012 wrote to memory of 3760	5012	helper.exe	87

C:\Users\Admin\AppData\Local\Temp\257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe
"C:\Users\Admin\AppData\Local\Temp\257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Users\Admin\AppData\Local\Temp\257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe
  "C:\Users\Admin\AppData\Local\Temp\257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: RenamesItself
  - Suspicious use of WriteProcessMemory
  PID:1400
- - C:\ProgramData\514248\helper.exe
    "C:\ProgramData\514248\helper.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5012
  - - C:\ProgramData\514248\helper.exe
      "C:\ProgramData\514248\helper.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
      PID:3760

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

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Downloads

C:\ProgramData\514248\helper.exe

Filesize
258KB

MD5
220e4be9f75f1a8ed6091702fc0b7fe5

SHA1
4cae4f91647f96474eecd5e186a63e5d8451a11e

SHA256
257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d

SHA512
177bb7ae8e5e61cebdac28917e19afb053b3d77c408c12fe4bb6d91ab1eeef356c495f8da100c541052459b45f4dd32f00bfbd642925b57042e3e1e99c42bd22

Download Submit
C:\ProgramData\514248\helper.exe

Filesize
258KB

MD5
220e4be9f75f1a8ed6091702fc0b7fe5

SHA1
4cae4f91647f96474eecd5e186a63e5d8451a11e

SHA256
257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d

SHA512
177bb7ae8e5e61cebdac28917e19afb053b3d77c408c12fe4bb6d91ab1eeef356c495f8da100c541052459b45f4dd32f00bfbd642925b57042e3e1e99c42bd22

Download Submit
C:\ProgramData\514248\helper.exe

Filesize
258KB

MD5
220e4be9f75f1a8ed6091702fc0b7fe5

SHA1
4cae4f91647f96474eecd5e186a63e5d8451a11e

SHA256
257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d

SHA512
177bb7ae8e5e61cebdac28917e19afb053b3d77c408c12fe4bb6d91ab1eeef356c495f8da100c541052459b45f4dd32f00bfbd642925b57042e3e1e99c42bd22

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\257d954b25d5d45b7ee8fd5bb47ad2e423e39f88a64da75e34e4a482a9728d1d.exe.log

Filesize
312B

MD5
6dba4702b346903da02f7dd9e839a128

SHA1
d69f255866f30a87c9eca8312d425c47059bf15e

SHA256
29d145faac0201870c39b9119894f78694a776e03fc8f79349bdf92e56a65bcd

SHA512
33afef187e806838717238881aaaf41272f8b484fcfe97a85057fd43a7eeb119df813d6023d2ee770aa22a067f7e9d532dd1c30b512f9c48b76f838615863e1d

Download Submit
memory/1400-140-0x0000000074B70000-0x0000000075121000-memory.dmp

Filesize
5.7MB

Download
memory/1400-155-0x0000000074B70000-0x0000000075121000-memory.dmp

Filesize
5.7MB

Download
memory/1400-134-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/1400-136-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/1400-151-0x0000000074B70000-0x0000000075121000-memory.dmp

Filesize
5.7MB

Download
memory/1684-132-0x0000000074B70000-0x0000000075121000-memory.dmp

Filesize
5.7MB

Download
memory/1684-139-0x0000000074B70000-0x0000000075121000-memory.dmp

Filesize
5.7MB

Download
memory/3760-153-0x0000000074B70000-0x0000000075121000-memory.dmp

Filesize
5.7MB

Download
memory/3760-154-0x0000000074B70000-0x0000000075121000-memory.dmp

Filesize
5.7MB

Download
memory/5012-144-0x0000000074B70000-0x0000000075121000-memory.dmp

Filesize
5.7MB

Download
memory/5012-152-0x0000000074B70000-0x0000000075121000-memory.dmp

Filesize
5.7MB

Download