remcos | 4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Virtual.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Lin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Lin.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Virtual.exe

Executes dropped EXE 3 IoCs

pid	Process
2804	login.exe
2716	Lin.exe
3000	Virtual.exe

Loads dropped DLL 2 IoCs

pid	Process
2716	Lin.exe
2716	Lin.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Lin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Lin.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Virtual.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Virtual.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3000 set thread context of 2612	3000	Virtual.exe	34

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	login.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Lin.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Virtual.exe

Modifies Internet Explorer settings 1 TTPs 3 IoCs

adware spyware

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	login.exe
Key created	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Internet Explorer\Main	login.exe
Key created	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	login.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3000	Virtual.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2804	login.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2804	login.exe
2804	login.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1416 wrote to memory of 2804	1416	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	31
PID 1416 wrote to memory of 2804	1416	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	31
PID 1416 wrote to memory of 2804	1416	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	31
PID 1416 wrote to memory of 2804	1416	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	31
PID 1416 wrote to memory of 2716	1416	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	32
PID 1416 wrote to memory of 2716	1416	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	32
PID 1416 wrote to memory of 2716	1416	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	32
PID 1416 wrote to memory of 2716	1416	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	32
PID 2716 wrote to memory of 3000	2716	Lin.exe	33
PID 2716 wrote to memory of 3000	2716	Lin.exe	33
PID 2716 wrote to memory of 3000	2716	Lin.exe	33
PID 2716 wrote to memory of 3000	2716	Lin.exe	33
PID 3000 wrote to memory of 2612	3000	Virtual.exe	34
PID 3000 wrote to memory of 2612	3000	Virtual.exe	34
PID 3000 wrote to memory of 2612	3000	Virtual.exe	34
PID 3000 wrote to memory of 2612	3000	Virtual.exe	34
PID 3000 wrote to memory of 2612	3000	Virtual.exe	34

C:\Users\Admin\AppData\Local\Temp\4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe
"C:\Users\Admin\AppData\Local\Temp\4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1416
- C:\Users\Admin\AppData\Local\Temp\login.exe
  "C:\Users\Admin\AppData\Local\Temp\login.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies Internet Explorer settings
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2804
- C:\Users\Admin\AppData\Local\Temp\Lin.exe
  "C:\Users\Admin\AppData\Local\Temp\Lin.exe"
  2⤵
  - Adds policy Run key to start application
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\Users\Admin\AppData\Local\Temp\Oracle\Virtual.exe
    "C:\Users\Admin\AppData\Local\Temp\Oracle\Virtual.exe"
    3⤵
    - Adds policy Run key to start application
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:3000
  - - C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      4⤵
      PID:2612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Modify Registry

3