marsstealer | bfe1158258e04a58d37eab94edfe9cdf88438a0f7244747d73f81fd7c5798c4b

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	petya.exe

ModiLoader Second Stage 1 IoCs

resource	yara_rule
behavioral1/memory/3596-230-0x0000000002F10000-0x0000000003F10000-memory.dmp	modiloader_stage2

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

T1082

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

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3078542121-369484597-920690335-1000\Control Panel\International\Geo\Nation	scary.exe

Executes dropped EXE 12 IoCs

pid	Process
4932	spectrum.exe
4832	hostingBypass.exe
5376	MEMZ.exe
4280	build22.exe
4792	petya.exe
1776	pc raper.exe
3404	Java Updater.exe
5880	Cry.exe
4592	wannacry.exe
2872	sample_stub.exe
1688	Nemezida.exe
2548	HorionInjector.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

defense_evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3078542121-369484597-920690335-1000\Software\Wine	petya.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3772	icacls.exe

VMProtect packed file 1 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral1/files/0x000700000002420a-285.dat	vmprotect

File and Directory Permissions Modification: Windows File and Directory Permissions Modification 1 TTPs
defense_evasion

Windows File and Directory Permissions Modification
T1222.001
Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	petya.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4792	petya.exe

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 9 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	MEMZ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pc raper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Cry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample_stub.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scary.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	petya.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

pid	Process
2216	schtasks.exe
864	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
5844	powershell.exe
5844	powershell.exe
1832	powershell.exe
4792	petya.exe
4792	petya.exe
1832	powershell.exe
1832	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	5844	powershell.exe
Token: SeDebugPrivilege	4932	spectrum.exe
Token: SeDebugPrivilege	4280	build22.exe
Token: SeDebugPrivilege	1832	powershell.exe
Token: SeDebugPrivilege	3404	Java Updater.exe

Suspicious use of WriteProcessMemory 47 IoCs

description	pid	Process	procid_target
PID 5052 wrote to memory of 5844	5052	scary.exe	89
PID 5052 wrote to memory of 5844	5052	scary.exe	89
PID 5052 wrote to memory of 5844	5052	scary.exe	89
PID 5052 wrote to memory of 1832	5052	scary.exe	93
PID 5052 wrote to memory of 1832	5052	scary.exe	93
PID 5052 wrote to memory of 1832	5052	scary.exe	93
PID 5052 wrote to memory of 4932	5052	scary.exe	95
PID 5052 wrote to memory of 4932	5052	scary.exe	95
PID 5052 wrote to memory of 4832	5052	scary.exe	96
PID 5052 wrote to memory of 4832	5052	scary.exe	96
PID 5052 wrote to memory of 5376	5052	scary.exe	97
PID 5052 wrote to memory of 5376	5052	scary.exe	97
PID 5052 wrote to memory of 5376	5052	scary.exe	97
PID 5052 wrote to memory of 4280	5052	scary.exe	98
PID 5052 wrote to memory of 4280	5052	scary.exe	98
PID 5052 wrote to memory of 4792	5052	scary.exe	99
PID 5052 wrote to memory of 4792	5052	scary.exe	99
PID 5052 wrote to memory of 4792	5052	scary.exe	99
PID 5052 wrote to memory of 1776	5052	scary.exe	100
PID 5052 wrote to memory of 1776	5052	scary.exe	100
PID 5052 wrote to memory of 1776	5052	scary.exe	100
PID 4932 wrote to memory of 2216	4932	spectrum.exe	102
PID 4932 wrote to memory of 2216	4932	spectrum.exe	102
PID 4932 wrote to memory of 3404	4932	spectrum.exe	105
PID 4932 wrote to memory of 3404	4932	spectrum.exe	105
PID 5052 wrote to memory of 5880	5052	scary.exe	104
PID 5052 wrote to memory of 5880	5052	scary.exe	104
PID 5052 wrote to memory of 5880	5052	scary.exe	104
PID 5052 wrote to memory of 4592	5052	scary.exe	106
PID 5052 wrote to memory of 4592	5052	scary.exe	106
PID 5052 wrote to memory of 4592	5052	scary.exe	106
PID 5052 wrote to memory of 3108	5052	scary.exe	107
PID 5052 wrote to memory of 3108	5052	scary.exe	107
PID 5052 wrote to memory of 3108	5052	scary.exe	107
PID 5052 wrote to memory of 2872	5052	scary.exe	108
PID 5052 wrote to memory of 2872	5052	scary.exe	108
PID 5052 wrote to memory of 2872	5052	scary.exe	108
PID 5052 wrote to memory of 2548	5052	scary.exe	110
PID 5052 wrote to memory of 2548	5052	scary.exe	110
PID 5052 wrote to memory of 1688	5052	scary.exe	111
PID 5052 wrote to memory of 1688	5052	scary.exe	111
PID 4592 wrote to memory of 5428	4592	wannacry.exe	112
PID 4592 wrote to memory of 5428	4592	wannacry.exe	112
PID 4592 wrote to memory of 5428	4592	wannacry.exe	112
PID 4592 wrote to memory of 3772	4592	wannacry.exe	113
PID 4592 wrote to memory of 3772	4592	wannacry.exe	113
PID 4592 wrote to memory of 3772	4592	wannacry.exe	113

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

Views/modifies file attributes 1 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
5428	attrib.exe
5008	attrib.exe

C:\Users\Admin\AppData\Local\Temp\scary.exe
"C:\Users\Admin\AppData\Local\Temp\scary.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5052
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGIAYgBsACMAPgBBAGQAZAAtAFQAeQBwAGUAIAAtAEEAcwBzAGUAbQBiAGwAeQBOAGEAbQBlACAAUwB5AHMAdABlAG0ALgBXAGkAbgBkAG8AdwBzAC4ARgBvAHIAbQBzADsAPAAjAGUAegBsACMAPgBbAFMAeQBzAHQAZQBtAC4AVwBpAG4AZABvAHcAcwAuAEYAbwByAG0AcwAuAE0AZQBzAHMAYQBnAGUAQgBvAHgAXQA6ADoAUwBoAG8AdwAoACcAQQByAGUAIAB5AG8AdQAgAGEAbgAgAGkAZABpAG8AdAA/ACcALAAnACcALAAnAE8ASwAnACwAJwBRAHUAZQBzAHQAaQBvAG4AJwApADwAIwBlAHEAagAjAD4A"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5844
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGEAZgByACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAHcAaABpACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAHoAegBnACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGEAdwByACMAPgA="
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1832
- C:\Users\Admin\AppData\Roaming\spectrum.exe
  "C:\Users\Admin\AppData\Roaming\spectrum.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4932
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\spectrum.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2216
- - C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3404
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:864
- C:\Users\Admin\AppData\Roaming\hostingBypass.exe
  "C:\Users\Admin\AppData\Roaming\hostingBypass.exe"
  2⤵
  - Executes dropped EXE
  PID:4832
- - C:\Windows\system32\cmd.exe
    /c reg delete "HKEY_CURRENT_USER\Software\Classes\ms-settings" /f
    3⤵
    PID:1204
- C:\Users\Admin\AppData\Roaming\MEMZ.exe
  "C:\Users\Admin\AppData\Roaming\MEMZ.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:5376
- - C:\Users\Admin\AppData\Roaming\MEMZ.exe
    "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
    3⤵
    PID:5280
- - C:\Users\Admin\AppData\Roaming\MEMZ.exe
    "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
    3⤵
    PID:3256
- - C:\Users\Admin\AppData\Roaming\MEMZ.exe
    "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
    3⤵
    PID:5296
- - C:\Users\Admin\AppData\Roaming\MEMZ.exe
    "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
    3⤵
    PID:4368
- - C:\Users\Admin\AppData\Roaming\MEMZ.exe
    "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
    3⤵
    PID:4740
- - C:\Users\Admin\AppData\Roaming\MEMZ.exe
    "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /main
    3⤵
    PID:4436
- C:\Users\Admin\AppData\Roaming\build22.exe
  "C:\Users\Admin\AppData\Roaming\build22.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:4280
- C:\Users\Admin\AppData\Roaming\petya.exe
  "C:\Users\Admin\AppData\Roaming\petya.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Identifies Wine through registry keys
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4792
- C:\Users\Admin\AppData\Roaming\pc raper.exe
  "C:\Users\Admin\AppData\Roaming\pc raper.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:1776
- C:\Users\Admin\AppData\Roaming\Cry.exe
  "C:\Users\Admin\AppData\Roaming\Cry.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:5880
- - C:\Users\Admin\AppData\Local\Temp\4363463463464363463463463.exe
    "C:\Users\Admin\AppData\Local\Temp\4363463463464363463463463.exe"
    3⤵
    PID:4948
- - C:\Users\Admin\AppData\Local\Temp\a76e49df84ba2a7b33e8ea959995b5e6faecb90d551ef169d8272ce9042c35a5.exe
    "C:\Users\Admin\AppData\Local\Temp\a76e49df84ba2a7b33e8ea959995b5e6faecb90d551ef169d8272ce9042c35a5.exe"
    3⤵
    PID:2960
- - C:\Users\Admin\AppData\Local\Temp\asena.exe
    "C:\Users\Admin\AppData\Local\Temp\asena.exe"
    3⤵
    PID:5744
- - C:\Users\Admin\AppData\Local\Temp\Bomb.exe
    "C:\Users\Admin\AppData\Local\Temp\Bomb.exe"
    3⤵
    PID:4260
- C:\Users\Admin\AppData\Roaming\wannacry.exe
  "C:\Users\Admin\AppData\Roaming\wannacry.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4592
- - C:\Windows\SysWOW64\attrib.exe
    attrib +h .
    3⤵
    - Views/modifies file attributes
    PID:5428
- - C:\Windows\SysWOW64\icacls.exe
    icacls . /grant Everyone:F /T /C /Q
    3⤵
    - Modifies file permissions
    PID:3772
- - C:\Users\Admin\AppData\Roaming\taskdl.exe
    taskdl.exe
    3⤵
    PID:2884
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c 302461744403330.bat
    3⤵
    PID:5112
- - C:\Windows\SysWOW64\attrib.exe
    attrib +h +s F:\$RECYCLE
    3⤵
    - Views/modifies file attributes
    PID:5008
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\V1.5 App view (1) (1).bat" "
  2⤵
  PID:3108
- C:\Users\Admin\AppData\Roaming\sample_stub.exe
  "C:\Users\Admin\AppData\Roaming\sample_stub.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2872
- C:\Users\Admin\AppData\Roaming\HorionInjector.exe
  "C:\Users\Admin\AppData\Roaming\HorionInjector.exe"
  2⤵
  - Executes dropped EXE
  PID:2548
- C:\Users\Admin\AppData\Roaming\Nemezida.exe
  "C:\Users\Admin\AppData\Roaming\Nemezida.exe"
  2⤵
  - Executes dropped EXE
  PID:1688
- C:\Users\Admin\AppData\Roaming\Optimiser.exe
  "C:\Users\Admin\AppData\Roaming\Optimiser.exe"
  2⤵
  PID:1376
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHkAdgBlACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGcAZwB3ACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAGMAagBrACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGkAcABlACMAPgA="
    3⤵
    PID:5040
- - C:\Users\Admin\AppData\Local\Temp\Optimiser.exe
    "C:\Users\Admin\AppData\Local\Temp\Optimiser.exe"
    3⤵
    PID:4420
- - C:\Users\Admin\AppData\Local\Temp\system.exe
    "C:\Users\Admin\AppData\Local\Temp\system.exe"
    3⤵
    PID:4684
- C:\Users\Admin\AppData\Roaming\CHROME.exe
  "C:\Users\Admin\AppData\Roaming\CHROME.exe"
  2⤵
  PID:3596

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

File and Directory Permissions Modification

T1222

Windows File and Directory Permissions Modification

T1222.001

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Obfuscated Files or Information

T1027

Command Obfuscation

T1027.010

Pre-OS Boot

T1542

Bootkit

T1542.003

Virtualization/Sandbox Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion