remcos | 6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1632-59-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1812-58-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral1/memory/2732-63-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1632-59-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/1812-58-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

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
2648	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	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.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	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	wab.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	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.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	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1736 set thread context of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 2592 set thread context of 1812	2592	wab.exe	38
PID 2592 set thread context of 1632	2592	wab.exe	39
PID 2592 set thread context of 2732	2592	wab.exe	40

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2648	powershell.exe
1812	wab.exe
1812	wab.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2592	wab.exe
2592	wab.exe
2592	wab.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2648	powershell.exe
Token: SeDebugPrivilege	2732	wab.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2592	wab.exe

Suspicious use of WriteProcessMemory 54 IoCs

description	pid	Process	procid_target
PID 1736 wrote to memory of 2648	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	30
PID 1736 wrote to memory of 2648	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	30
PID 1736 wrote to memory of 2648	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	30
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2860	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	32
PID 1736 wrote to memory of 2776	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	33
PID 1736 wrote to memory of 2776	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	33
PID 1736 wrote to memory of 2776	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	33
PID 1736 wrote to memory of 2776	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	33
PID 1736 wrote to memory of 2588	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	34
PID 1736 wrote to memory of 2588	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	34
PID 1736 wrote to memory of 2588	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	34
PID 1736 wrote to memory of 2588	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	34
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2592	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	35
PID 1736 wrote to memory of 2468	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	36
PID 1736 wrote to memory of 2468	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	36
PID 1736 wrote to memory of 2468	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	36
PID 1736 wrote to memory of 2468	1736	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe	36
PID 2592 wrote to memory of 1812	2592	wab.exe	38
PID 2592 wrote to memory of 1812	2592	wab.exe	38
PID 2592 wrote to memory of 1812	2592	wab.exe	38
PID 2592 wrote to memory of 1812	2592	wab.exe	38
PID 2592 wrote to memory of 1812	2592	wab.exe	38
PID 2592 wrote to memory of 1632	2592	wab.exe	39
PID 2592 wrote to memory of 1632	2592	wab.exe	39
PID 2592 wrote to memory of 1632	2592	wab.exe	39
PID 2592 wrote to memory of 1632	2592	wab.exe	39
PID 2592 wrote to memory of 1632	2592	wab.exe	39
PID 2592 wrote to memory of 2732	2592	wab.exe	40
PID 2592 wrote to memory of 2732	2592	wab.exe	40
PID 2592 wrote to memory of 2732	2592	wab.exe	40
PID 2592 wrote to memory of 2732	2592	wab.exe	40
PID 2592 wrote to memory of 2732	2592	wab.exe	40

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"	6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe

C:\Users\Admin\AppData\Local\Temp\6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe
"C:\Users\Admin\AppData\Local\Temp\6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.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:1736
- 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\6c7572f38ec5853112211eb940751b660538d61f67ae8097c8435991768af98f.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2648
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe"
  2⤵
  PID:2860
- 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\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  PID:2588
- C:\Program Files (x86)\Windows Mail\wab.exe
  "C:\Program Files (x86)\Windows Mail\wab.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2592
- - C:\Program Files (x86)\Windows Mail\wab.exe
    "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\tdshggprjyfimlbfzjowwg"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:1812
- - C:\Program Files (x86)\Windows Mail\wab.exe
    "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\dxxzhzalxgxvwrpjiubphltbm"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1632
- - C:\Program Files (x86)\Windows Mail\wab.exe
    "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\nrdsirknlppazflnafnrkyosvxft"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2732
- C:\Program Files (x86)\Windows Mail\wab.exe
  "C:\Program Files (x86)\Windows Mail\wab.exe"
  2⤵
  PID:2468

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scripting

T1064

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

Scripting

T1064

Virtualization/Sandbox Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

Virtualization/Sandbox Evasion