metastealer | c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\Control Panel\International\Geo\Nation	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
Key value queried	\REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\Control Panel\International\Geo\Nation	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
Key value queried	\REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\Control Panel\International\Geo\Nation	Windows version update.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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\IMAP Subsystem = "C:\\Program Files (x86)\\IMAP Subsystem\\imapss.exe"	Windows version update.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Windows version update.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4624 set thread context of 4784	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	93
PID 4636 set thread context of 532	4636	Windows version update.exe	101

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\IMAP Subsystem\imapss.exe	Windows version update.exe
File created	C:\Program Files (x86)\IMAP Subsystem\imapss.exe	Windows version update.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 4 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

pid	Process
3928	schtasks.exe
2244	schtasks.exe
4288	schtasks.exe
4812	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
4784	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
4784	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
4784	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
4636	Windows version update.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
Token: SeDebugPrivilege	4784	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
Token: SeDebugPrivilege	4636	Windows version update.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 4624 wrote to memory of 4288	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	90
PID 4624 wrote to memory of 4288	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	90
PID 4624 wrote to memory of 4288	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	90
PID 4624 wrote to memory of 860	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	92
PID 4624 wrote to memory of 860	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	92
PID 4624 wrote to memory of 860	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	92
PID 4624 wrote to memory of 4784	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	93
PID 4624 wrote to memory of 4784	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	93
PID 4624 wrote to memory of 4784	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	93
PID 4624 wrote to memory of 4784	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	93
PID 4624 wrote to memory of 4784	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	93
PID 4624 wrote to memory of 4784	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	93
PID 4624 wrote to memory of 4784	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	93
PID 4624 wrote to memory of 4784	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	93
PID 4624 wrote to memory of 4784	4624	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	93
PID 4784 wrote to memory of 4636	4784	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	96
PID 4784 wrote to memory of 4636	4784	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	96
PID 4784 wrote to memory of 4636	4784	c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe	96
PID 4636 wrote to memory of 4812	4636	Windows version update.exe	99
PID 4636 wrote to memory of 4812	4636	Windows version update.exe	99
PID 4636 wrote to memory of 4812	4636	Windows version update.exe	99
PID 4636 wrote to memory of 532	4636	Windows version update.exe	101
PID 4636 wrote to memory of 532	4636	Windows version update.exe	101
PID 4636 wrote to memory of 532	4636	Windows version update.exe	101
PID 4636 wrote to memory of 532	4636	Windows version update.exe	101
PID 4636 wrote to memory of 532	4636	Windows version update.exe	101
PID 4636 wrote to memory of 532	4636	Windows version update.exe	101
PID 4636 wrote to memory of 532	4636	Windows version update.exe	101
PID 4636 wrote to memory of 532	4636	Windows version update.exe	101
PID 532 wrote to memory of 3928	532	Windows version update.exe	102
PID 532 wrote to memory of 3928	532	Windows version update.exe	102
PID 532 wrote to memory of 3928	532	Windows version update.exe	102
PID 532 wrote to memory of 2244	532	Windows version update.exe	104
PID 532 wrote to memory of 2244	532	Windows version update.exe	104
PID 532 wrote to memory of 2244	532	Windows version update.exe	104

C:\Users\Admin\AppData\Local\Temp\c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
"C:\Users\Admin\AppData\Local\Temp\c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe"
1⤵
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4624
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ARCeIRiCVNN" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7460.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:4288
- C:\Users\Admin\AppData\Local\Temp\c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
  "{path}"
  2⤵
  PID:860
- C:\Users\Admin\AppData\Local\Temp\c27e641edc2184890a340b8eac895e9f710a0aca5706b4becd117b2ed395d4d1.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4784
- - C:\Users\Admin\AppData\Local\Temp\Windows version update.exe
    "C:\Users\Admin\AppData\Local\Temp\Windows version update.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4636
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EvIVyHwuYkDISk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp67A9.tmp"
      4⤵
      Creates scheduled task(s)
      PID:4812
  - - C:\Users\Admin\AppData\Local\Temp\Windows version update.exe
      "{path}"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Checks whether UAC is enabled
      Drops file in Program Files directory
      Suspicious use of WriteProcessMemory
      PID:532
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks.exe" /create /f /tn "IMAP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp7371.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:3928
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks.exe" /create /f /tn "IMAP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8033.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:2244

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

Privilege Escalation

Scheduled Task

Defense Evasion

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery