remcos | e291787eb38a6bd40ca70158d8873ee4f9d8efe22906edf703f0ea2b8af3c248

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.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\WOW6432Node\VMware, Inc.\VMware Tools	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.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	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

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	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 828 set thread context of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101

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	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

pid	Process
4496	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 828 wrote to memory of 4496	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	99
PID 828 wrote to memory of 4496	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	99
PID 828 wrote to memory of 4496	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	99
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101
PID 828 wrote to memory of 2200	828	fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe	101

C:\Users\Admin\AppData\Local\Temp\fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fa24f9da95f1fc7861963a6f7b023b48_JaffaCakes118.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:828
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\xxvPBmNamwnD" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4DAE.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4496
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2200

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Virtualization/Sandbox Evasion

2

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

2