remcos | 7053c8d9983dc949e5d559ba1b006b8ba9c059a23e06cd87c857c3d04201381b

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	IB9876789000.bat.exe

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2892-55-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1384-54-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2568	powershell.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	IB9876789000.bat.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	IB9876789000.bat.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	IB9876789000.bat.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	wmplayer.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	IB9876789000.bat.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	IB9876789000.bat.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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	IB9876789000.bat.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	IB9876789000.bat.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2708 set thread context of 2864	2708	IB9876789000.bat.exe	37
PID 2864 set thread context of 1384	2864	wmplayer.exe	40
PID 2864 set thread context of 2892	2864	wmplayer.exe	41
PID 2864 set thread context of 2928	2864	wmplayer.exe	42

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 4 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	wmplayer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmplayer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmplayer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmplayer.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2568	powershell.exe
1384	wmplayer.exe
1384	wmplayer.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2864	wmplayer.exe
2864	wmplayer.exe
2864	wmplayer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2568	powershell.exe
Token: SeDebugPrivilege	2928	wmplayer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2864	wmplayer.exe

Suspicious use of WriteProcessMemory 49 IoCs

description	pid	Process	procid_target
PID 2708 wrote to memory of 2568	2708	IB9876789000.bat.exe	32
PID 2708 wrote to memory of 2568	2708	IB9876789000.bat.exe	32
PID 2708 wrote to memory of 2568	2708	IB9876789000.bat.exe	32
PID 2708 wrote to memory of 1128	2708	IB9876789000.bat.exe	34
PID 2708 wrote to memory of 1128	2708	IB9876789000.bat.exe	34
PID 2708 wrote to memory of 1128	2708	IB9876789000.bat.exe	34
PID 2708 wrote to memory of 1128	2708	IB9876789000.bat.exe	34
PID 2708 wrote to memory of 1128	2708	IB9876789000.bat.exe	34
PID 2708 wrote to memory of 1128	2708	IB9876789000.bat.exe	34
PID 2708 wrote to memory of 1128	2708	IB9876789000.bat.exe	34
PID 2708 wrote to memory of 1128	2708	IB9876789000.bat.exe	34
PID 2708 wrote to memory of 1128	2708	IB9876789000.bat.exe	34
PID 2708 wrote to memory of 2776	2708	IB9876789000.bat.exe	35
PID 2708 wrote to memory of 2776	2708	IB9876789000.bat.exe	35
PID 2708 wrote to memory of 2776	2708	IB9876789000.bat.exe	35
PID 2708 wrote to memory of 2776	2708	IB9876789000.bat.exe	35
PID 2708 wrote to memory of 2852	2708	IB9876789000.bat.exe	36
PID 2708 wrote to memory of 2852	2708	IB9876789000.bat.exe	36
PID 2708 wrote to memory of 2852	2708	IB9876789000.bat.exe	36
PID 2708 wrote to memory of 2852	2708	IB9876789000.bat.exe	36
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2864	2708	IB9876789000.bat.exe	37
PID 2708 wrote to memory of 2988	2708	IB9876789000.bat.exe	38
PID 2708 wrote to memory of 2988	2708	IB9876789000.bat.exe	38
PID 2708 wrote to memory of 2988	2708	IB9876789000.bat.exe	38
PID 2864 wrote to memory of 1384	2864	wmplayer.exe	40
PID 2864 wrote to memory of 1384	2864	wmplayer.exe	40
PID 2864 wrote to memory of 1384	2864	wmplayer.exe	40
PID 2864 wrote to memory of 1384	2864	wmplayer.exe	40
PID 2864 wrote to memory of 1384	2864	wmplayer.exe	40
PID 2864 wrote to memory of 2892	2864	wmplayer.exe	41
PID 2864 wrote to memory of 2892	2864	wmplayer.exe	41
PID 2864 wrote to memory of 2892	2864	wmplayer.exe	41
PID 2864 wrote to memory of 2892	2864	wmplayer.exe	41
PID 2864 wrote to memory of 2892	2864	wmplayer.exe	41
PID 2864 wrote to memory of 2928	2864	wmplayer.exe	42
PID 2864 wrote to memory of 2928	2864	wmplayer.exe	42
PID 2864 wrote to memory of 2928	2864	wmplayer.exe	42
PID 2864 wrote to memory of 2928	2864	wmplayer.exe	42
PID 2864 wrote to memory of 2928	2864	wmplayer.exe	42

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	IB9876789000.bat.exe

C:\Users\Admin\AppData\Local\Temp\IB9876789000.bat.exe
"C:\Users\Admin\AppData\Local\Temp\IB9876789000.bat.exe"
1⤵
- UAC bypass
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2708
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\IB9876789000.bat.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2568
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe"
  2⤵
  PID:1128
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  PID:2776
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe"
  2⤵
  PID:2852
- C:\Program Files (x86)\Windows Media Player\wmplayer.exe
  "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2864
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\sdyrmdxtqib"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1384
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\uxdjnvineqtuwn"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2892
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\fzqcnobosylzgbzez"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2928
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2708 -s 836
  2⤵
  PID:2988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Virtualization/Sandbox Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion