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/5304-282-0x0000000002CB0000-0x0000000003CB0000-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 3 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-1-5-21-3027557611-1484967174-339164627-1000\Control Panel\International\Geo\Nation	scary.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3027557611-1484967174-339164627-1000\Control Panel\International\Geo\Nation	Optimiser.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3027557611-1484967174-339164627-1000\Control Panel\International\Geo\Nation	Cry.exe

Credentials from Password Stores: Windows Credential Manager 1 TTPs
Suspicious access to Credentials History.
credential_access stealer

Windows Credential Manager
T1555.004

Executes dropped EXE 15 IoCs

pid	Process
4736	spectrum.exe
4876	hostingBypass.exe
4556	MEMZ.exe
4496	build22.exe
4820	petya.exe
3560	pc raper.exe
2400	Cry.exe
2496	wannacry.exe
2096	Java Updater.exe
312	sample_stub.exe
5644	HorionInjector.exe
4464	Nemezida.exe
1468	Optimiser.exe
5304	CHROME.exe
2612	taskdl.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-1-5-21-3027557611-1484967174-339164627-1000\Software\Wine	petya.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1876	icacls.exe

VMProtect packed file 1 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral1/files/0x0007000000024216-437.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
4820	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 14 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	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskdl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scary.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	petya.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Optimiser.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CHROME.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MEMZ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample_stub.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
1624	schtasks.exe
1520	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5720	powershell.exe
5720	powershell.exe
4272	powershell.exe
4272	powershell.exe
4820	petya.exe
4820	petya.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	5720	powershell.exe
Token: SeDebugPrivilege	4272	powershell.exe
Token: SeDebugPrivilege	4736	spectrum.exe
Token: SeDebugPrivilege	4496	build22.exe
Token: SeDebugPrivilege	2096	Java Updater.exe
Token: SeDebugPrivilege	5644	HorionInjector.exe
Token: SeDebugPrivilege	4464	Nemezida.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 740 wrote to memory of 5720	740	scary.exe	84
PID 740 wrote to memory of 5720	740	scary.exe	84
PID 740 wrote to memory of 5720	740	scary.exe	84
PID 740 wrote to memory of 4272	740	scary.exe	88
PID 740 wrote to memory of 4272	740	scary.exe	88
PID 740 wrote to memory of 4272	740	scary.exe	88
PID 740 wrote to memory of 4736	740	scary.exe	90
PID 740 wrote to memory of 4736	740	scary.exe	90
PID 740 wrote to memory of 4876	740	scary.exe	91
PID 740 wrote to memory of 4876	740	scary.exe	91
PID 740 wrote to memory of 4556	740	scary.exe	92
PID 740 wrote to memory of 4556	740	scary.exe	92
PID 740 wrote to memory of 4556	740	scary.exe	92
PID 740 wrote to memory of 4496	740	scary.exe	93
PID 740 wrote to memory of 4496	740	scary.exe	93
PID 740 wrote to memory of 4820	740	scary.exe	94
PID 740 wrote to memory of 4820	740	scary.exe	94
PID 740 wrote to memory of 4820	740	scary.exe	94
PID 740 wrote to memory of 3560	740	scary.exe	95
PID 740 wrote to memory of 3560	740	scary.exe	95
PID 740 wrote to memory of 3560	740	scary.exe	95
PID 4736 wrote to memory of 1624	4736	spectrum.exe	96
PID 4736 wrote to memory of 1624	4736	spectrum.exe	96
PID 740 wrote to memory of 2400	740	scary.exe	99
PID 740 wrote to memory of 2400	740	scary.exe	99
PID 740 wrote to memory of 2400	740	scary.exe	99
PID 740 wrote to memory of 2496	740	scary.exe	100
PID 740 wrote to memory of 2496	740	scary.exe	100
PID 740 wrote to memory of 2496	740	scary.exe	100
PID 740 wrote to memory of 4524	740	scary.exe	102
PID 740 wrote to memory of 4524	740	scary.exe	102
PID 740 wrote to memory of 4524	740	scary.exe	102
PID 4736 wrote to memory of 2096	4736	spectrum.exe	101
PID 4736 wrote to memory of 2096	4736	spectrum.exe	101
PID 2496 wrote to memory of 5796	2496	wannacry.exe	104
PID 2496 wrote to memory of 5796	2496	wannacry.exe	104
PID 2496 wrote to memory of 5796	2496	wannacry.exe	104
PID 2496 wrote to memory of 1876	2496	wannacry.exe	105
PID 2496 wrote to memory of 1876	2496	wannacry.exe	105
PID 2496 wrote to memory of 1876	2496	wannacry.exe	105
PID 740 wrote to memory of 312	740	scary.exe	107
PID 740 wrote to memory of 312	740	scary.exe	107
PID 740 wrote to memory of 312	740	scary.exe	107
PID 740 wrote to memory of 5644	740	scary.exe	109
PID 740 wrote to memory of 5644	740	scary.exe	109
PID 740 wrote to memory of 4464	740	scary.exe	110
PID 740 wrote to memory of 4464	740	scary.exe	110
PID 740 wrote to memory of 1468	740	scary.exe	111
PID 740 wrote to memory of 1468	740	scary.exe	111
PID 740 wrote to memory of 1468	740	scary.exe	111
PID 740 wrote to memory of 5304	740	scary.exe	112
PID 740 wrote to memory of 5304	740	scary.exe	112
PID 740 wrote to memory of 5304	740	scary.exe	112
PID 2496 wrote to memory of 2612	2496	wannacry.exe	113
PID 2496 wrote to memory of 2612	2496	wannacry.exe	113
PID 2496 wrote to memory of 2612	2496	wannacry.exe	113
PID 2096 wrote to memory of 1520	2096	Java Updater.exe	114
PID 2096 wrote to memory of 1520	2096	Java Updater.exe	114
PID 2496 wrote to memory of 5588	2496	wannacry.exe	116
PID 2496 wrote to memory of 5588	2496	wannacry.exe	116
PID 2496 wrote to memory of 5588	2496	wannacry.exe	116
PID 1468 wrote to memory of 448	1468	Optimiser.exe	117
PID 1468 wrote to memory of 448	1468	Optimiser.exe	117
PID 1468 wrote to memory of 448	1468	Optimiser.exe	117

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
5796	attrib.exe
1636	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:740
- 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:5720
- 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:4272
- 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:4736
- - 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:1624
- - 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
    - Suspicious use of WriteProcessMemory
    PID:2096
  - - 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:1520
- C:\Users\Admin\AppData\Roaming\hostingBypass.exe
  "C:\Users\Admin\AppData\Roaming\hostingBypass.exe"
  2⤵
  - Executes dropped EXE
  PID:4876
- - C:\Windows\system32\cmd.exe
    /c reg delete "HKEY_CURRENT_USER\Software\Classes\ms-settings" /f
    3⤵
    PID:4448
- 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:4556
- C:\Users\Admin\AppData\Roaming\build22.exe
  "C:\Users\Admin\AppData\Roaming\build22.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:4496
- 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:4820
- 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:3560
- C:\Users\Admin\AppData\Roaming\Cry.exe
  "C:\Users\Admin\AppData\Roaming\Cry.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2400
- - C:\Users\Admin\AppData\Local\Temp\4363463463464363463463463.exe
    "C:\Users\Admin\AppData\Local\Temp\4363463463464363463463463.exe"
    3⤵
    PID:3696
- - C:\Users\Admin\AppData\Local\Temp\a76e49df84ba2a7b33e8ea959995b5e6faecb90d551ef169d8272ce9042c35a5.exe
    "C:\Users\Admin\AppData\Local\Temp\a76e49df84ba2a7b33e8ea959995b5e6faecb90d551ef169d8272ce9042c35a5.exe"
    3⤵
    PID:3800
- - C:\Users\Admin\AppData\Local\Temp\asena.exe
    "C:\Users\Admin\AppData\Local\Temp\asena.exe"
    3⤵
    PID:2672
- - C:\Users\Admin\AppData\Local\Temp\Bomb.exe
    "C:\Users\Admin\AppData\Local\Temp\Bomb.exe"
    3⤵
    PID:4584
- 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:2496
- - C:\Windows\SysWOW64\attrib.exe
    attrib +h .
    3⤵
    - Views/modifies file attributes
    PID:5796
- - C:\Windows\SysWOW64\icacls.exe
    icacls . /grant Everyone:F /T /C /Q
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:1876
- - C:\Users\Admin\AppData\Roaming\taskdl.exe
    taskdl.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2612
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c 78481744400774.bat
    3⤵
    PID:5588
- - C:\Windows\SysWOW64\attrib.exe
    attrib +h +s F:\$RECYCLE
    3⤵
    - Views/modifies file attributes
    PID:1636
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\V1.5 App view (1) (1).bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4524
- 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:312
- C:\Users\Admin\AppData\Roaming\HorionInjector.exe
  "C:\Users\Admin\AppData\Roaming\HorionInjector.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:5644
- C:\Users\Admin\AppData\Roaming\Nemezida.exe
  "C:\Users\Admin\AppData\Roaming\Nemezida.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:4464
- C:\Users\Admin\AppData\Roaming\Optimiser.exe
  "C:\Users\Admin\AppData\Roaming\Optimiser.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1468
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHkAdgBlACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGcAZwB3ACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAGMAagBrACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGkAcABlACMAPgA="
    3⤵
    PID:448
- - C:\Users\Admin\AppData\Local\Temp\Optimiser.exe
    "C:\Users\Admin\AppData\Local\Temp\Optimiser.exe"
    3⤵
    PID:4428
- C:\Users\Admin\AppData\Roaming\CHROME.exe
  "C:\Users\Admin\AppData\Roaming\CHROME.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:5304

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

Credentials from Password Stores

T1555

Windows Credential Manager

T1555.004

Discovery

Query Registry

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion