remcos | 93eab443abea7ef1d947b5183a291db18bf61ce5e7f9c3646621ded7a0aaec46

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\	YESS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\s8-2IFSXQ = "\"C:\\ProgramData\\s8\\s8.exe\""	YESS.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\	s8.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\s8-2IFSXQ = "\"C:\\ProgramData\\s8\\s8.exe\""	s8.exe

Executes dropped EXE 1 IoCs

pid	Process
3240	s8.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4280978039-528710165-233981602-1000\Software\Microsoft\Windows\CurrentVersion\Run\s8-2IFSXQ = "\"C:\\ProgramData\\s8\\s8.exe\""	YESS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\s8-2IFSXQ = "\"C:\\ProgramData\\s8\\s8.exe\""	YESS.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4280978039-528710165-233981602-1000\Software\Microsoft\Windows\CurrentVersion\Run\s8-2IFSXQ = "\"C:\\ProgramData\\s8\\s8.exe\""	s8.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\s8-2IFSXQ = "\"C:\\ProgramData\\s8\\s8.exe\""	s8.exe

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

System Information Discovery
T1082

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	s8.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	s8.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3240	s8.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	4484	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	4484	AUDIODG.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3240	s8.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3240	s8.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3240	s8.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 2636 wrote to memory of 3240	2636	YESS.exe	93

C:\Users\Admin\AppData\Local\Temp\YESS.exe
"C:\Users\Admin\AppData\Local\Temp\YESS.exe"
1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2636
- C:\ProgramData\s8\s8.exe
  "C:\ProgramData\s8\s8.exe"
  2⤵
  - Adds policy Run key to start application
  - Executes dropped EXE
  - Adds Run key to start application
  - Reads the TCP/IP host and domain name from the registry
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:3240

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x00000000000004F8 0x00000000000004D8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4484

Network

MITRE ATT&CK Enterprise v16

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

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Lateral Movement

Collection

Data from Local System